![Johannes Benedikt](https://profiles-cardiff.imgix.net/attachments/3838?w=200&h=200&auto=format&crop=faces&fit=crop&q=90")
Overview
Johannes Benedikt received the Dipl.-Ing. Degree in electrical engineering from the University of Ulm, Germany in 1997 and shortly after he started a PhD course at Cardiff University. During his PhD project he developed a £0.5M research project with Nokia on RF power amplifiers and took on the position of senior research associate at Cardiff University starting at October 2000. He was awarded a PhD degree in 2002 and was appointed as a Lecturer in 2004 and a Senior Lecturer from August 2009. Following his success in research and engagement activities with industry he was awarded a personal chair in May 2010.
He has a strong industrial background working together with DaimlerChrysler, Siemens, Robert Bosch, Nokia, Agilent, Tektronix, Mitsubishi Electric and Huawei. He has successfully submitted four international patents in Europe, North America and parts of Asia with his patents in the area of high-frequency measurement systems resulting in the formation of a university spin-out in 2008. In April 2009 he took on the position of a CTO at Mesuro Ltd, leading the commercial introduction of new measurement solutions that enable systematic waveform engineering at RF and microwave frequencies. Following the company acquisition by Focus Microwave Group he has returned to research at Cardiff University.
His research focuses on
- wideband and pulsed load-pull instrumentation and
- application of low-power RF irradiation on human cells in collaboration with School of Medical.
With regards to the second topic, the impact on human cancer cells has been of particular focus. Here, modulated RF signals at power levels that maintain a temperature below 40 degree Celcius are utilised to reduce the growth of cancarous tissues. The achieved promising results have lead to a new patent application and an on-going commercialisation effort.
Publication
2024
- Xu, Y., Benedikt, J. and Ye, L. 2024. Hyaluronic acid interacting molecules mediated crosstalk between cancer cells and microenvironment from primary tumour to distant metastasis. Cancers 16(10), article number: 1907. (10.3390/cancers16101907)
2021
- Alimohammadi, Y. et al. 2021. Incorporating gate-lag effects into the Cardiff Behavioural Model. Presented at: 50th European Microwave Conference (EuMC 2020), Utrecht, Netherlands, 12-14 January 20212020 50th European Microwave Conference (EuMC). IEEE pp. 684-687., (10.23919/EuMC48046.2021.9338185)
2020
- Alimohammadi, Y. et al. 2020. Pulse profiling active load pull measurements. Presented at: IEEE/MTT-S International Microwave Symposium (IMS 2020), Los Angeles, CA, USA, 4-6 August 20202020 IEEE/MTT-S International Microwave Symposium (IMS). IEEE pp. 759-762., (10.1109/IMS30576.2020.9223989)
- Zhao, Z. et al. 2020. Abstract P3-01-18: Kinase D interacting substrate 220 (Kidins220) and disease progression of breast cancer, the role of heat shock protein90 (HSP90). Presented at: San Antonio Breast Cancer Symposium, San Antonio, TX, United States, 10-14 December 2019, Vol. 80. Vol. 4, Sup. American Association for Cancer Research pp. P3-01-18., (10.1158/1538-7445.SABCS19-P3-01-18)
- Zhao, Z. et al. 2020. Abstract P2-07-01: Kidins220 (kinase D interacting substrate 220) has a connection with neutrotrophic related factors, BDNF and NGF, in human breast cancer. Presented at: San Antonio Breast Cancer Symposium, San Antonio, TX, United States, 10-14 December 2019, Vol. 80. Vol. 4, Sup. pp. P2-07-01., (10.1158/1538-7445.SABCS19-P2-07-01)
2019
- Chaudhary, M. A., Yusoff, Z., Lees, J., Benedikt, J. and Tasker, P. 2019. Auxiliary envelope tracking focused investigations of a 10W GaN HEMTs device. Presented at: 3rd International Conference on Circuits, Systems and Devices (ICCSD), Chengdu, China, 23-25 Aug 2017Proceedings of 3rd International Conference on Circuits, Systems and Devices (ICCSD). IEEE pp. 92., (10.1109/ICCSD.2019.8843202)
- You, F. and Benedikt, J. 2019. An optimized-load-impedance calculation and mining method based on i-v curves: Using broadband class-e power amplifier as example. IEEE Transactions on Industrial Electronics 66(7), pp. 5254-5263. (10.1109/TIE.2018.2868020)
- Al-Rawachy, A., Husseini, T., Benedikt, J., Tasker, P. and Bell, J. 2019. Cardiff behavioural model analysis using a two-tone stimulus. Presented at: 2019 IEEE Topical Conference on RF/Microwave Power Amplifiers for Radio and Wireless Applications (PAWR), Orlando, FL, USA, 20-23 January 20192019 IEEE Topical Conference on RF/Microwave Power Amplifiers for Radio and Wireless Applications (PAWR). IEEE pp. 5-8., (10.1109/PAWR.2019.8708726)
- Syed Anera, S. M. H. et al. 2019. High-efficiency broadband PA design based on continuous Class-F mode with compression. Presented at: 2019 IEEE MTT-S International Microwave Symposium, IMS 2019, Boston, USA, 2 -7 June 2019MTT-S International Microwave Symposium (IMS). IEEE pp. 698-701., (10.1109/MWSYM.2019.8700767)
- Al-Rawachy, A., Husseini, T., Benedikt, J., Bell, J. and Tasker, P. 2019. Behavioural model extraction using novel multitone active load-pull. Presented at: 2019 IEEE MTT-S International Microwave Symposium, IMS 2019, Boston, USA, 2 -7 June 2019MTT-S International Microwave Symposium (IMS). IEEE pp. 196-199., (10.1109/MWSYM.2019.8700779)
- Husseini, T., Al-Rawachy, A., Benedikt, J., Bell, J. and Tasker, P. 2019. Global behavioural model generation using coefficients interpolation. Presented at: 2019 IEEE MTT-S International Microwave Symposium, IMS 2019, Boston, USA, 2 -7 June 2019. pp. -.
2018
- Liu, Z., Wu, Y., Zhao, C., Benedikt, J. and Kang, K. 2018. A 5-Gb/s 66 dB CMOS variable-gain amplifier with reconfigurable DC-offset cancellation for multi-standard applications. IEEE Access 6, pp. 54139-54146. (10.1109/ACCESS.2018.2867227)
- Husseini, T., Al-Rawachy, A., Benedikt, J., Bel, J. and Tasker, P. 2018. Automating the accurate extraction and verification of the Cardiff Model via the direct measurement of load-pull power contours. Presented at: 2018 IEEE/MTT-S International Microwave Symposium - IMS, Philadelphia, PA, USA, 10-15 June 20182018 IEEE/MTT-S International Microwave Symposium - IMS. IEEE pp. 544., (10.1109/MWSYM.2018.8439581)
- Husseini, T., Al-Rawachy, A., Anera, S. S., Bell, J., Tasker, P. and Benedikt, J. 2018. On the effective modeling of the test-set non-linearity. Presented at: 2018 91st ARFTG Microwave Measurement Conference (ARFTG), Philadelphia, PA, USA, 15 June 20182018 91st ARFTG Microwave Measurement Conference (ARFTG). IEEE, (10.1109/ARFTG.2018.8423832)
- Chaudhary, M. A., Memon, Z. A., Yusoff, Z., Lees, J., Benedikt, J. and Tasker, P. 2018. Optimization of out-of-band impedance environment for linearity improvements of microwave power transistors. Presented at: 2018 5th International Conference on Electrical and Electronic Engineering (ICEEE), Istanbul, Turkey, 3-5 May 20182018 5th International Conference on Electrical and Electronic Engineering (ICEEE). IEEE pp. 219-223., (10.1109/ICEEE2.2018.8391334)
- Chaudhary, M. A., Memon, Z. A., Lees, J., Benedikt, J. and Tasker, P. 2018. Multitone measurement system for linearity investigations of microwave devices. Presented at: International Multi-Topic Conference (Inmic), Lahore, Pakistan, 24-26 Nov 2017International Multi-Topic Conference (Inmic). IEEE, (10.1109/INMIC.2017.8289455)
2017
- Ji, S., Hong, Y., Spencer, P. S., Benedikt, J. and Davies, I. 2017. Broad tunable photonic microwave source using a single-mode VCSEL subject to parallel optical injection. Presented at: Lasers and Electro-Optics Europe & European Quantum Electronics Conference (CLEO/Europe-EQEC), Munich, Germany, 25-29 June 20172017 Conference on Lasers and Electro-Optics Europe & European Quantum Electronics Conference (CLEO/Europe-EQEC). IEEE pp. 1., (10.1109/CLEOE-EQEC.2017.8086553)
- Song, Y. et al. 2017. A compact ka-band active integrated antenna with a GaAs amplifier in a ceramic package. IEEE Antennas and Wireless Propagation Letters 16, pp. 2416-2419. (10.1109/LAWP.2017.2721956)
- Ji, S., Hong, Y., Spencer, P. S., Benedikt, J. and Davies, I. 2017. Broad tunable photonic microwave generation based on period-one dynamics of optical injection vertical-cavity surface-emitting lasers. Optics Express 25(17), pp. 19863-19871. (10.1364/OE.25.019863)
- Chaudhary, M. A., Memon, Z. A., Yusoff, Z., Lees, J., Benedikt, J. and Tasker, P. J. 2017. Characterization of baseband electrical memory in microwave devices using multi-tone measurement system. Presented at: 2016 16th Mediterranean Microwave Symposium (MMS), 14-16 November 201616th Mediterranean Microwave Symposium (MMS), 2016. IEEE pp. 1., (10.1109/MMS.2016.7803811)
2016
- Chaudhary, M. A., Lees, J., Benedikt, J. and Tasker, P. J. 2016. Modulated waveform measurement and engineering system. Presented at: 2015 2nd International Conference on Electronics and Communication Systems (ICECS), Cairo, Egypt, 6-9 December 20152015 IEEE International Conference on Electronics, Circuits, and Systems (ICECS 2015). Institute of Electrical and Electronics Engineers (IEEE) pp. 252-255., (10.1109/ICECS.2015.7440296)
2014
- Ogboi, F. L. et al. 2014. Investigation of various envelope complexity linearity under modulated stimulus using a new envelope formulation approach. Presented at: 83rd ARFTG Microwave Measurement Conference 2014, Tampa, USA, 1 - 6 June 2014Compound Semiconductor Integrated Circuit Symposium (CSICs), 2014 IEEE. IEEE pp. 1-4., (10.1109/CSICS.2014.6978563)
- Ogboi, F. L. et al. 2014. High bandwidth investigations of a baseband linearization approach formulated in the envelope domain under modulated stimulus. Presented at: European Microwave Conference (EuMC) 2014, Rome, Italy, 6-9 October 2014European Microwave Conference (EuMC), Vol. 44. IEEE pp. 1305-1308., (10.1109/EuMC.2014.6986683)
- Ogboi, F. L. et al. 2014. Sensitivity of AM/AM linearizer to AM/PM distortion in devices. Presented at: 83rd ARFTG Microwave Measurement Conference 2014, Tampa, FL, USA, 6 June 2014ARFTG Microwave Measurement Conference (ARFTG), 2014 83rd. IEEE pp. 1-4., (10.1109/ARFTG.2014.6899507)
2013
- Ogboi, F. L. et al. 2013. A LSNA configured to perform baseband engineering for device linearity investigations under modulated excitations. Presented at: 43rd European Microwave Conference, Nuremberg, Germany, 7-10 October 2013Proceedings of the 43rd European Microwave Conference. pp. 684-687.
- Chaudhary, M. A., Memon, Z. A., Lees, J., Benedikt, J. and Tasker, P. J. 2013. Investigation of baseband electrical memory effects on the dynamic characteristics of power transistors. Presented at: 2013 16th International Multi Topic Conference (INMIC), Lahore, Pakistan, 19-20 December 2013Multi Topic Conference (INMIC), 2013 16th International. IEEE pp. 106-109., (10.1109/INMIC.2013.6731333)
- Chaudhary, M. A., Lees, J., Benedikt, J. and Tasker, P. J. 2013. Reduction of baseband electrical memory effects using broadband active baseband load-pull. Presented at: 2013 IEEE International Wireless Symposium (IWS), Beijing, China, 14-18 April 2013Wireless Symposium (IWS), 2013 IEEE International. IEEE pp. 1-4., (10.1109/IEEE-IWS.2013.6616709)
- Hone, T. M. et al. 2013. Inverse active load-pull in an inverse Doherty amplifier. Presented at: 2013 IEEE Topical Conference on Power Amplifiers for Wireless and Radio Applications, Santa Clara, CA, USA, 20 Jauary 2013Power Amplifiers for Wireless and Radio Applications (PAWR), 2013 IEEE Topical Conference on. IEEE pp. 4-6., (10.1109/PAWR.2013.6490170)
2012
- McGenn, W., Uren, M. J., Benedikt, J. and Tasker, P. J. 2012. Development of an RF IV waveform based stress test procedure for use on GaN HFETs. Microelectronics Reliability 52(12), pp. 2880-2883. (10.1016/j.microrel.2012.09.007)
- Bensmida, S. et al. 2012. Nonlinear envelope tracking for efficiency optimization of power amplifiers. Presented at: 7th European Microwave Integrated Circuits Conference (EuMIC) 2012, Amsterdam, The Netherlands, 29-30 October 20127th European Microwave Integrated Circuits Conference (EuMIC), 2012. Picastaway, NJ: IEEE pp. 480-483.
- Carrubba, V., Akmal, M., Quay, R., Lees, J., Benedikt, J., Cripps, S. C. and Tasker, P. J. 2012. The Continuous Inverse Class-F Mode With Resistive Second-Harmonic Impedance. IEEE Transactions on Microwave Theory and Techniques 60(6), pp. 1928-1936. (10.1109/TMTT.2012.2189228)
- Hone, T. M. et al. 2012. Controlling Active Load-Pull in a Dual-Input Inverse Load Modulated Doherty Architecture. IEEE Transactions on Microwave Theory and Techniques 60(6), pp. 1797-1804. (10.1109/TMTT.2012.2190748)
- McGenn, W., Choi, H., Lees, J., Uren, M. J., Benedikt, J. and Tasker, P. J. 2012. Development of a RF waveform stress test procedure for GaN HFETs subjected to infinite VSWR sweeps. Presented at: 2012 IEEE MTT-S International Microwave Symposium Digest, Montreal, Canada, 17-22 June 2012Microwave Symposium Digest (MTT), 2012 IEEE MTT-S International. IEEE pp. 1-3., (10.1109/MWSYM.2012.6259725)
- Carrubba, V. et al. 2012. Continuous-ClassF3 power amplifier mode varying simultaneously first 3 harmonic impedances. Presented at: 2012 IEEE MTT-S International Microwave Symposium Digest, Montreal, Canada, 17-22 June 2012Microwave Symposium Digest (MTT), 2012 IEEE MTT-S International. IEEE pp. 1-3., (10.1109/MWSYM.2012.6258343)
- Smith, R. M., Lees, J., Tasker, P. J., Benedikt, J. and Cripps, S. C. 2012. A 40W push-pull power amplifier for high efficiency, decade bandwidth applications at microwave frequencies. Presented at: 2012 IEEE MTT-S International Microwave Symposium Digest (MTT, Montreal, Canada, 17-22 June 2012Microwave Symposium Digest (MTT), 2012 IEEE MTT-S International. IEEE pp. 1-3., (10.1109/MWSYM.2012.6259418)
- Smith, R. M., Lees, J., Tasker, P. J., Benedikt, J. and Cripps, S. C. 2012. A Novel Formulation for High Efficiency Modes in Push-Pull Power Amplifiers Using Transmission Line Baluns. IEEE Microwave and Wireless Components Letters 22(5), pp. 257-259. (10.1109/LMWC.2012.2191273)
- Tasker, P. J., Carrubba, V., Wright, P., Lees, J., Benedikt, J. and Cripps, S. C. 2012. Wideband PA design: The "continuous" mode of operation. Presented at: Compound Semiconductor Integrated Circuit Symposium (CSICS), La Jolla, CA, USA, 14-17 October 2012Compound Semiconductor Integrated Circuit Symposium (CSICS), 2012 IEEE. IEEE pp. 1-4., (10.1109/CSICS.2012.6340048)
- Mimis, K., Morris, K. A., Beach, M. A., McGeehan, J. P., Lees, J., Benedikt, J. and Tasker, P. J. 2012. Overlapped segment piece-wise polynomial pre-distortion for the linearisation of power amplifiers in the presence of high PAPR OFDM signals. Presented at: 2012 IEEE MTT-S International Microwave Symposium Digest, Montreal, Canada, 17-22 June 2012Microwave Symposium Digest (MTT), 2012 IEEE MTT-S International. pp. 1-3., (10.1109/MWSYM.2012.6259543)
- Akmal, M., Carrubba, V., Lees, J., Benedikt, J. and Tasker, P. J. 2012. An enhanced modulated waveform measurement system. Australian Journal of Electrical and Electronics Engineering 9(4), pp. 429-438. (10.7158/E11-033.2012.9.4)
- Akmal, M. et al. 2012. Characterization of electrical memory effects for complex multi-tone excitations using broadband active baseband load-pull. Presented at: 7th European Microwave Integrated Circuits Conference, Amsterdam, The Netherlands, 29-30 October 20127th European Microwave Integrated Circuits Conference (EuMIC), 2012. Picastaway, NJ: IEEE pp. 885-888.
2011
- Carrubba, V., Clarke, A. L., Akmal, M., Lees, J., Benedikt, J., Tasker, P. J. and Cripps, S. C. 2011. On the extension of the continuous class-F mode power amplifier. IEEE Transactions on Microwave Theory and Techniques 59(5), pp. 1294-1303. (10.1109/TMTT.2011.2117435)
- Tasker, P. J. and Benedikt, J. 2011. Waveform inspired models and the harmonic balance emulator. IEEE Microwave Magazine 12(2), pp. 38-54. (10.1109/MMM.2010.940101)
- Yusoff, Z. B., Akmal, M., Carrubba, V., Lees, J., Benedikt, J., Tasker, P. J. and Cripps, S. C. 2011. The benefit of GaN characteristics over LDMOS for linearity improvement using drain modulation in power amplifier system. Presented at: 2011 Workshop on Integrated Nonlinear Microwave and Millimetre-Wave Circuits, Vienna, Austria, 18-19 April 20112011 Workshop on Integrated Nonlinear Microwave and Millimetre-Wave Circuits (INMMIC 2011). New York: IEEE pp. 109-112., (10.1109/INMMIC.2011.5773334)
- Carrubba, V., Lees, J., Benedikt, J., Tasker, P. J. and Cripps, S. C. 2011. A novel highly efficient broadband continuous class-F RFPA delivering 74% average efficiency for an octave bandwidth. Presented at: 2011 IEEE/MTT-S International Microwave Symposium, Baltimore, MD, USA, 5-10 June 20112011 IEEE/MTT-S International Microwave Symposium - MTT 2011. New York: IEEE pp. 350-353., (10.1109/MWSYM.2011.5972701)
- Yusoff, Z. B., Lees, J., Benedikt, J., Tasker, P. J. and Cripps, S. C. 2011. Linearity improvement in RF power amplifier system using integrated Auxiliary Envelope Tracking system. Presented at: 2011 IEEE/MTT-S International Microwave Symposium, Baltimore, MD, USA, 5-10 June 2011 Presented at Seigel, P. et al. eds.2011 IEEE/MTT-S International Microwave Symposium - MTT 2011. New York: IEEE pp. 1752-1755., (10.1109/MWSYM.2011.5972769)
- FitzPatrick, D., Saini, R., Lees, J., Benedikt, J., Cripps, S. C. and Tasker, P. J. 2011. A waveform engineering approach to the design of improved efficiency wideband MMIC amplifiers. Presented at: Wireless and Microwave Technology Conference (WAMICON), 2011 IEEE 12th Annual., Clearwater Beach, FL, USA, 18-19 April 20112011 IEEE 12th Annual Wireless and Microwave Technology Conference (WAMICON), Clearwater Beach, FL, 18-19 April 2011. Los Alamitos, CA: IEEE pp. 225-230., (10.1109/WAMICON.2011.5872859)
- Akmal, M. et al. 2011. Linearity enhancement of GaN HEMTs under complex modulated excitation by optimizing the baseband impedance environment. Presented at: 2011 IEEE/MTT-S International Microwave Symposium, Baltimore, MD, USA, 5-10 June 2011 Presented at Seigel, P. et al. eds.2011 IEEE/MTT-S International Microwave Symposium - MTT 2011. New York: IEEE pp. 1747-1750., (10.1109/MWSYM.2011.5972833)
- Smith, R. M., Cripps, S. C., Tasker, P. J., Benedikt, J. and Lees, J. 2011. A design methodology for the realization of multi-decade baluns at microwave frequencies. Presented at: 2011 IEEE/MTT-S International Microwave Symposium, Baltimore, MD, USA, 5-10 June 2011 Presented at Seigel, P. et al. eds.2011 IEEE/MTT-S International Microwave Symposium - MTT 2011. New York: IEEE pp. 1204-1208., (10.1109/MWSYM.2011.5972702)
- Bell, J. J., Saini, R., Woodington, S. P., Lees, J., Benedikt, J., Cripps, S. C. and Tasker, P. J. 2011. Behavioral model analysis using simultaneous active fundamental load-pull and harmonic source-pull measurements at X-band. Presented at: 2011 IEEE/MTT-S International Microwave Symposium, Baltimore, MD, USA, 5-10 June 2011Microwave Symposium Digest (MTT), 2011 IEEE MTT-S International. New York: IEEE pp. 982-986., (10.1109/MWSYM.2011.5972803)
- Powell, J. R. et al. 2011. GaAs X-band high efficiency (65%) broadband (30%) amplifier MMIC based on the Class B to Class J continuum. Presented at: 2011 IEEE/MTT-S International Microwave Symposium, Baltimore, MD, USA, 5-10 June 2011 Presented at Seigel, P. et al. eds.2011 IEEE/MTT-S International Microwave Symposium - MTT 2011. New York: IEEE pp. 355., (10.1109/MWSYM.2011.5973350)
- Saini, R. et al. 2011. High speed non-linear device characterization and uniformity investigations at X-band frequencies exploiting behavioral models. Presented at: 2011 77th ARFTG Microwave Measurement Conference (ARFTG), Baltimore, MD, USA, 10 June 2011Design and Measurement of Microwave Systems - Proceedings of the 2011 77th ARFTG Microwave Measurement Conference (ARFTG). Los Alamitos, CA: IEEE, (10.1109/ARFTG77.2011.6034552)
- Carrubba, V. et al. 2011. High-speed device characterization using an active load-pull system and waveform engineering postulator. Presented at: 2011 77th ARFTG Microwave Measurement Conference (ARFTG), Baltimore, MD, USA, 10 June 2011Design and Measurement of Microwave Systems - Proceedings of the 2011 77th ARFTG Microwave Measurement Conference (ARFTG). Los Alamitos, CA: IEEE, (10.1109/ARFTG77.2011.6034553)
- Canning, T. A. J., Almuhaisen, A., Lees, J., Benedikt, J., Cripps, S. C. and Tasker, P. J. 2011. Utilization of RF I-V waveform load-pull information to identify the role FET knee profile has on locating the efficiency maxima. Presented at: 2011 78th ARFTG Microwave Measurement Symposium (ARFTG), Tempe, AZ, USA, 1-2 December 2011Proceedings of the 2011 78th ARFTG Microwave Measurement Symposium (ARFTG) - High Power RF Measurement Techniques. Los Alamitos, CA: IEEE, (10.1109/ARFTG78.2011.6183864)
- Saini, R., Bell, J. J., Williams, T., Lees, J., Benedikt, J. and Tasker, P. J. 2011. Interpolation and extrapolation capabilities of non-linear behavioural models. Presented at: 2011 78th ARFTG Microwave Measurement Symposium (ARFTG), Tempe, AZ, USA, 1-2 December 2011Proceedings of the 2011 78th ARFTG Microwave Measurement Symposium (ARFTG) - High Power RF Measurement Techniques. Los Alamitos, CA: IEEE, (10.1109/ARFTG78.2011.6183865)
- Casbon, M. A., Tasker, P. J. and Benedikt, J. 2011. Waveform Engineering beyond the Safe Operating Region: Fully Active Harmonic Load Pull Measurements under Pulsed Conditions. Presented at: 2011 IEEE Compound Semiconductor Integrated Circuit Symposium (CSICS), Waikoloa, HI, USA, 16-19 October 2011Proceedings of the 2011 IEEE Compound Semiconductor Integrated Circuit Symposium (CSICS) - INTEGRATED CIRCUITS IN GaAs, InP, SiGe, GaN and Other Compound Semiconductors. Los Alamitos, CA: IEEE, (10.1109/CSICS.2011.6062435)
- Carrubba, V. et al. 2011. Exploring the Design Space for Broadband PAs using the Novel "Continuous Inverse Class-F Mode". Presented at: 6th European Microwave Integrated Circuits Conference (EuMIC) 2011, Manchester, UK, 10-11 October 2011Proceedings of the 41st European Microwave Conference (EuMC). IEEE pp. 333-336.
- Hone, T. et al. 2011. Optimized load modulation in a doherty amplifier using a current injection technique. Presented at: 6th European Microwave Integrated Circuits Conference (EuMIC) 2011, Manchester, UK, 10-11 October 2011Proceedings of the 6th European Microwave Integrated Circuits Conference (EuMIC). Los Alamitos, CA: IEEE pp. 296-299.
- Akmal, M. et al. 2011. An enhanced modulated waveform measurement system for the robust characterization of microwave devices under modulated excitation. Presented at: Microwave Integrated Circuits Conference (EuMIC), 2011 European, Manchester, 10-11 October 2011Microwave Integrated Circuits Conference (EuMIC), 2011 European. IEEE pp. 180-183.
- McGenn, W., Benedikt, J., Tasker, P. J., Powell, J. and Uren, M. 2011. RF waveform investigation of VSWR sweeps on GaN HFETs. Presented at: 6th European Microwave Integrated Circuits Conference (EuMIC) 2011, Manchester, UK, 10-11 October 2011Proceedings of the 6th European Microwave Integrated Circuits Conference (EuMIC). Los Alamitos, CA: IEEE pp. 17-20.
- Paynter, M. et al. 2011. Non-linear large signal PA modelling for switching-mode operation (class-F/continuous class-F). Presented at: 6th European Microwave Integrated Circuits Conference (EuMIC) 2011, Manchester, UK, 10-11 October 2011Proceedings of the 6th European Microwave Integrated Circuits Conference (EuMIC). Los Alamitos, CA: IEEE pp. 152-155.
- Almuhaisen, A., Lees, J., Cripps, S. C., Tasker, P. J. and Benedikt, J. 2011. Wide band high-efficiency power amplifier design. Presented at: 6th European Microwave Integrated Circuits Conference (EuMIC) 2011, Manchester, UK, 10-11 October 2011Proceedings of the 6th European Microwave Integrated Circuits Conference (EuMIC). Los Alamitos, CA: IEEE pp. 184-187.
2010
- Hashmi, M. S., Clarke, A. L., Woodington, S. P., Lees, J., Benedikt, J. and Tasker, P. J. 2010. An accurate calibrate-able multiharmonic active load-pull system based on the envelope load-pull concept. IEEE Transactions on Microwave Theory and Techniques 58(3), pp. 656-664. (10.1109/TMTT.2010.2040403)
- Clarke, A. L., Akmal, M., Lees, J., Tasker, P. J. and Benedikt, J. 2010. Investigation and analysis into device optimization for attaining efficiencies in-excess of 90% when accounting for higher harmonics. Presented at: IEEE MTT-S International Microwave Symposium, Anaheim, CA, USA, 23-28 May 20102010 IEEE MTT-S International Microwave Symposium Digest (MTT 2010). New York: IEEE pp. 1114-1117., (10.1109/MWSYM.2010.5517222)
- Alghanim, A., Benedikt, J. and Tasker, P. 2010. Effect of low frequency memory on high power 12W LDMOS transistors intermodulation distortion. Proceedings of the World Academy of Science, Engineering and Technology 63, pp. 53-57.
- Hashmi, M. S., Benedikt, J. and Tasker, P. 2010. Impact of group delay on the load emulation in multi-tone active envelope load-pull system. Australian Journal of Electrical and Electronics Engineering 7(1), pp. 83-88.
- Akmal, M. et al. 2010. The effect of baseband impedance termination on the linearity of GaN HEMTs. Presented at: European Microwave Conference 2010, Paris, France. Vol. 561636. pp. 1046-1049.
- Akmal, M. et al. 2010. The impact of baseband electrical memory effects on the dynamic transfer characteristics of microwave power transistors. Presented at: 2010 Workshop on Integrated Nonlinear Microwave and Millimetre-Wave Circuits (INMMIC), Gothenburg, Sweden. Vol. 548011. pp. 148-151.
- Hashim, S., Hashmi, M. S., Benedikt, J. and Tasker, P. J. 2010. Effect of impedance variation around the fundamentals on PA distortions characteristics under wideband multi-tone stimulus. Presented at: IEEE Asia Pacific Conference on Circuits and Systems, Kuala Lumpur, Malaysia, 6-9 December 2010 Presented at Rohani, F. Z. et al. eds.Proceedings of the 2010 Asia Pacific Conference on Circuit and System, 6th – 9th December 2010, Kuala Lumpur, Malaysia. Los Alamitos, CA: IEEE pp. 1115-1118., (10.1109/APCCAS.2010.5775081)
- Mashad Nemati, H. et al. 2010. Evaluation of a GaN HEMT transistor for load- and supply-modulation applications using intrinsic waveform measurements. Presented at: IEEE MTT 2010 International Microwave Symposium, Anaheim, CA, USA, 23-28 May 20102010 IEEE MTT-S International Microwave Symposium Digest (MTT 2010). Piscataway, NJ: IEEE pp. 509-512., (10.1109/MWSYM.2010.5517696)
- Woodington, S. P., Saini, R., Williams, D., Lees, J., Benedikt, J. and Tasker, P. J. 2010. Behavioral model analysis of active harmonic load-pull measurements. Presented at: IEEE MTT-S International Microwave Symposium, Anaheim, CA, USA, 23-28 May 2010Microwave Symposium Digest (MTT), 2010 IEEE MTT-S International. New York: IEEE pp. 1688-1691., (10.1109/MWSYM.2010.5517261)
- Almuhaisen, A., Wright, P. T., Lees, J., Tasker, P. J., Cripps, S. C. and Benedikt, J. 2010. Novel wide band high-efficiency active harmonic injection power amplifier concept. Presented at: IEEE MTT-S International Microwave Symposium, Anaheim, CA, USA, 23-28 May 20102010 IEEE MTT-S International Microwave Symposium Digest (MTT 2010). New York: IEEE pp. 664-667., (10.1109/MWSYM.2010.5514759)
- FitzPatrick, D. M., Williams, T., Lees, J., Benedikt, J., Cripps, S. C. and Tasker, P. 2010. Exploitation of active load-pull and DLUT models in MMIC design. Presented at: IEEE Radio Frequency Integrated Circuits Symposium, Anaheim, CA, USA, 23-25 May 2010Proceedings of the 2010 IEEE Radio Frequency Integrated Circuits Symposium May 23-25, 2010, Anaheim, California, USA. Piscataway, NJ: IEEE pp. 487-490., (10.1109/RFIC.2010.5477406)
- McGenn, W., Powell, J., Uren, M., Benedikt, J. and Tasker, P. 2010. RF waveform method for the determination of the safe operating area of GaN HFET's for amplifiers subjected to high output VSWR. Presented at: European Microwave Week 2010: Connecting the World, (EuMIC 2010), Paris, France. Vol. 561371. pp. 282-285.
- Bensmida, S. et al. 2010. Generic pre-distortion of a Class-J Power amplifier. Presented at: European Microwave Conference 2010, Paris, France. Vol. 561648. pp. 1022-1025.
- Carrubba, V., Clarke, A. L., Akmal, M., Lees, J., Benedikt, J., Tasker, P. and Cripps, S. C. 2010. The continuous Class-F Mode mode power amplifier. Presented at: European Microwave Conference (EuMC) 2010, Paris, France. Vol. 561630. pp. 1674-1677.
- Lees, J. et al. 2010. Waveform engineering applied to linear-efficient PA design. Presented at: 2010 IEEE 11th Annual Wireless and Microwave Technology Conference (WAMICON 2010), Melbourne Beach, USA, 12-13 April, 2010. Vol. 546184., (10.1109/WAMICON.2010.5461847)
- Saini, R., Woodington, S. P., Lees, J., Benedikt, J. and Tasker, P. J. 2010. An intelligence driven active loadpull system. Presented at: 75th ARFTG Microwave Measurement Conference: Measurement of Modulated Signals for Communications, Anaheim, USA. Vol. 549632.
- Akmal, M. et al. 2010. Minimization of baseband electrical memory effects in GaN HEMTs using active IF load-pull. Presented at: Asia-Pacific Microwave Conference (22nd : 2010), Yokahama-shi, Japan, 7-10 December 20102010 Asia-Pacific Microwave Conference proceedings : APMC 2010 : Dec. 7-10, Yokohama, Japan. Tokyo, Japan: Institute of Electronics, Information and Communication Engineers (IEICE) pp. 5-8.
2009
- Wright, P., Lees, J., Benedikt, J., Tasker, P. and Cripps, S. C. 2009. A Methodology for Realizing High Efficiency Class-J in a Linear and Broadband PA. IEEE Transactions on Microwave Theory and Techniques 57(12), pp. 3196-3204. (10.1109/TMTT.2009.2033295)
- Fitzpatrick, D. M., Lees, J., Sheikh, A., Benedikt, J. and Tasker, P. J. 2009. Systematic investigation of the impact of harmonic termination in the efficiency performance of above octave bandwidth microwave amplifiers. Presented at: European Microwave Conference, 2009 (EuMC 2009), Rome, Italy, 29 September - 1 October 2009European Microwave Week 2009 - "Science, Progress and Quality at Radiofrequencies": Conference Proceedings. London: Horizon House Publications pp. 1445-1448.
- Cripps, S. C., Tasker, P., Clarke, A. L., Lees, J. and Benedikt, J. 2009. On the continuity of high efficiency modes in linear RF power amplifiers. IEEE Microwave and Wireless Components Letters 19(10), pp. 665-667. (10.1109/LMWC.2009.2029754)
- Sheikh, A., Roff, C., Benedikt, J., Tasker, P. J., Noori, B., Wood, J. and Aaen, P. H. 2009. Peak class F and inverse class F drain efficiencies using Si LDMOS in a limited bandwidth design. IEEE Microwave and Wireless Components Letters 19(7), pp. 473-475. (10.1109/LMWC.2009.2022138)
- Qi, H., Benedikt, J. and Tasker, P. 2009. Nonlinear Data Utilization: From Direct Data Lookup to Behavioral Modeling. IEEE Transactions on Microwave Theory and Techniques 57(6), pp. 1425-1432. (10.1109/TMTT.2009.2019996)
- Roff, C. et al. 2009. Analysis of DC-RF Dispersion in AlGaN/GaN HFETs Using RF Waveform Engineering. IEEE Transactions of Electron Devices 56(1), pp. 13-19. (10.1109/TED.2008.2008674)
- Hashim, S. J., Hashmi, M. S., Williams, T., Woodington, W., Benedikt, J. and Tasker, P. 2009. Active envelope load-pull for wideband multi-tone stimulus incorporating delay compensation. Presented at: 38th European Microwave Conference, 2008 (EuMC 2008), Amsterdam, The Netherlands, 27-31 October 2008Proceedings of the 38th European Microwave Conference, 2008 (EuMC 2008). Los Alamitos, CA: IEEE pp. 317-320., (10.1109/EUMC.2008.4751452)
- Sheikh, A., Lees, J., Benedikt, J. and Tasker, P. J. 2009. Utilization of a measurement based CAD tool for enhanced pa design investigations. Presented at: 38th European Microwave Conference, 2008 (EuMC 2008), Amsterdam, The Netherlands, 27-31 October 2008Proceedings of the 38th European Microwave Conference, 2008 (EuMC 2008). Los Alamitos, CA: IEEE pp. 1671-1674., (10.1109/EUMC.2008.4751795)
- Hashmi, M. S., Clarke, A. L., Woodington, S. P., Lees, J., Benedikt, J. and Tasker, P. 2009. Electronic Multi-Harmonic Load-Pull System for Experimentally Driven Power Amplifier Design Optimization. Presented at: IEEE/MTT-S International Microwave Symposium 2009, Boston, USA. pp. 1549-1552.
- Kang, I., Zhang, H., Yun, Y., Tasker, P., Benedikt, J. and Porch, A. 2009. High quality factor extraction of miniaturised coupled line bandpass filter implemented using RF silicon integrated circuits. Presented at: Proceedings 39th European Microwave Conference (EuMC 2009), Rome, Italy. pp. 830-833., (10.1109/EUMC.2009.5295966)
- Wright, P. T., Lees, J., Tasker, P. J., Benedikt, J. and Cripps, S. C. 2009. An Efficient, Linear, Broadband Class-J-Mode PA Realised Using RF. Presented at: IEEE/MTT-S International Microwave Symposium 2009, Boston, MA, USA, 7-12 June 2009IEEE MTT-S International Microwave Symposium Digest, 2009. MTT '09. Los Alamitos, CA: IEEE pp. 653-656., (10.1109/MWSYM.2009.5165781)
- Bensmida, S. et al. 2009. Power amplifier memory-less pre-distortion for 3GPP LTE application. Presented at: European Microwave Conference, 2009 (EuMC 2009), Rome, Italy, 29 September - 1 October 2009European Microwave Week 2009 - "Science, Progress and Quality at Radiofrequencies": Conference Proceedings. London: Horizon House Publications pp. 1433-1436.
2008
- Alghanim, A., Lees, J., Williams, T., Benedikt, J. and Tasker, P. J. 2008. Sensitivity of electrical baseband memory effects to higher-order IF components for high-power LDMOS power amplifiers. Electronics Letters 44(5), pp. 358-359. (10.1049/el:20083348)
- Alghanim, A., Lees, J., Williams, T., Benedikt, J. and Tasker, P. 2008. Reduction of electrical baseband memory effect in high-power LDMOS devices using optimum termination for IMD3 and IMD5 using active load-pull. Presented at: IEEE MTT-S International Microwave Symposium Digest, Atlanta, USA. pp. 415-418., (10.1109/MWSYM.2008.4633191)
- FitzPatrick, D. M., Williams, T., Lees, J., Benedikt, J. and Tasker, P. 2008. Large signal device characterisation using active load-pull for improved MMIC design. Presented at: IET Seminar on RF and Microwave IC Design, London, UK. IET pp. 1-7.
- Hashmi, M. S., Hashim, S. J., Woodington, S., Williams, T., Benedikt, J. and Tasker, P. 2008. Active envelope load pull system suitable for high modulation rate multi-tone applications. Presented at: Integrated Nonlinear Microwave & Millimetre-Wave Circuits 2008 Workshop (INMMIC 2008), Malaga, Spain. pp. 93-96., (10.1109/INMMIC.2008.4745724)
- Wright, P. T., Sheikh, A., Roff, C., Tasker, P. J. and Benedikt, J. 2008. Highly efficient operation modes in GaN power transistors delivering upwards of 81% efficiency and 12W output power. Presented at: IEEE MTT-S International Microwave Symposium, Atlanta, GA, USA, 15-20 June 2008Proceedings of the IEEE MTT-S International Microwave Symposium Digest, Atlanta, USA, 15-20 June 2008. Piscataway, NJ: Institute of Electrical and Electronics Engineers pp. 1147-1150., (10.1109/MWSYM.2008.4633260)
- Jiangtao, S., Benedikt, J. and Tasker, P. 2008. A new method for the design of multi-sine excitations for the assessment of non-linear devices. Presented at: Microwave Symposium Digest, 2008 IEEE MTT-S International, Atlanta, GA. pp. 265-268., (10.1109/MWSYM.2008.463315)
- Lees, J., Williams, T., Woodington, S., McGovern, P., Cripps, S. C., Benedikt, J. and Tasker, P. 2008. Demystifying Device related Memory Effects using Waveform Engineering and Envelope Domain Analysis. Presented at: 38th European Microwave Conference 2008 (EuMC 2008), Amsterdam, The Netherlands. pp. 753-756., (10.1109/EUMC.2008.471562)
- Roff, C. et al. 2008. Pulsed-IV and RF waveform measurements of unique high-K dielectric GaN MOSFETs. Presented at: IEEE International Conference on Microwaves, Communications, Antennas and Electronic Systems (COMCAS), Tel Aviv, Israel. , (10.1109/COMCAS.2008.4562790)
- Sheikh, A., Roff, C., Benedikt, J., Tasker, P. J., Noori, B., Aaen, P. and Wood, J. P. 2008. Systematic waveform engineering enabling high efficiency modes of operation in Si LDMOS at both L-band and S-band frequencies. Presented at: IEEE MTT-S International Microwave Symposium Digest, Atlanta, USA. pp. 1143-1146., (10.1109/MWSYM.2008.4633259)
- Su, J., Benedikt, J. and Tasker, P. J. 2008. A new method for the design of multi-sine excitations for the assessment of non-linear devices. Presented at: IEEE MTT-S International Microwave Symposium Digest, Atlanta, USA. pp. 265-268., (10.1109/MWSYM.2008.4633154)
- Williams, T., Mojon, O., Woodington, S. P., Lees, J., Barciela, M. F., Benedikt, J. and Tasker, P. J. 2008. A robust approach for comparison and validation of large signal measurement systems. Presented at: IEEE MTT-S International Microwave Symposium Digest, Atlanta, USA. pp. 257-260., (10.1109/MWSYM.2008.4633152)
- Woodington, S. P. et al. 2008. A novel measurement based method enabling rapid extraction of a RF waveform look-up table based behavioural model. Presented at: IEEE MTT-S International Microwave Symposium Digest, Atlanta, USA. pp. 1453-1456., (10.1109/MWSYM.2008.463305)
- Wright, P. T., Lees, J., Tasker, P. J. and Benedikt, J. 2008. GaN power transistors in narrow and wide bandwidth applications. Presented at: IET Seminar on Wideband Receivers and Components, London, UK. pp. 1.
2007
- Benedikt, J., Qi, H. and Tasker, P. . J. 2007. Novel Nonlinear Model for Rapid Waveform-based Extraction Enabling Accurate High Power PA Design. Presented at: IEEE MTT-S International Microwave Symposium Digest 2007. , (10.1109/MWSYM.2007.380246)
- Roff, C., Benedikt, J. and Tasker, P. J. 2007. Design Approach for Realization of Very High Efficiency Power Amplifiers. Presented at: IEEE MTT-S International Microwave Symposium Digest 2007. , (10.1109/MWSYM.2007.380310)
- Roff, C. et al. 2007. Detailed analysis of DC-RF dispersion in AlGaN/GaN HFETs using waveform measurements. Presented at: 1st European Microwave Integrated Circuits Conference, Manchester, UK, 10-13 Sept 20062006 European Microwave Integrated Circuits Conference. IEEE pp. 43., (10.1109/EMICC.2006.282745)
- Gaddi, R., Williams, T., Benedikt, J., Tasker, P., Giacomozzi, F., Margesin, B. and Gnudi, A. 2007. Large-Signal Vectorial Load - Pull Characterization of MEMS RF-Actuation. IEEE Microwave and Wireless Components Letters 17(12), pp. 903-905. (10.1109/LMWC.2007.908049)
- Alghanim, A., Lees, J., Wiliams, T., Benedikt, J. and Tasker, P. 2007. Investigation of electrical base-band memory effects in high power 20w LDMOS power amplifiers. Presented at: 37th European Microwave Conference, Munich, Germany. pp. 48-51., (10.1109/EUMC.2007.4405122)
- Hashmi, M. S., Hashim, S. J., Williams, T., Benedikt, J. and Tasker, P. 2007. A broadband control electronics for envelope load pull system. Presented at: International Symposium on Signals, Systems and Electronics (ISSSE07), Montreal, Canada. pp. 197-200., (10.1109/ISSSE.2007.4294447)
- Benedikt, J. and Tasker, P. 2007. Characterisation of high power RF transistors: Waveform measurement and engineering. Presented at: Proceedings Workshop on Advances in Active Device Characterisation and Modelling for RF and Microwave, IEEE MTT-S International Microwave Symposium.
- Roff, C. et al. 2007. Optimising GaN/AIGaN HFET designs for high efficiency. Presented at: 2nd European Microwave Integrated Circuits Conference (EuMIC 2007), Munich, Germany. pp. 165-168., (10.1109/EMICC.2007.4412674)
- Sheikh, A., Tasker, P. J., Lees, J. and Benedikt, J. 2007. The impact of system impedance on the characterisation of high power devices. Presented at: 37th European Microwave Conference (EuMC), Munich, Germany. pp. 949-952., (10.1109/EUMC.2007.4405315)
- Alghanim, A., Lees, J., Williams, T., Benedikt, J. and Tasker, P. J. 2007. Using active IF load-pull to investigate electrical base-band induced memory effects in high-power LDMOS transistors. Presented at: Asia-Pacific Microwave Conference (APMC 2007), Bangkok, Thailand. IEEE pp. 1-4., (10.1109/APMC.2007.4554737)
- Tasker, P. J. and Benedikt, J. 2007. Waveform measurement and characterisation: The multi-tone characterisation challenge. Presented at: Proceedings of Workshop on RF power transistor and amplifier characterisation techniques, IEEE 2007 Radio and Wireless Symposium, Long Beach, USA.
2006
- Qi, H., Benedikt, J. and Tasker, P. J. 2006. A novel approach for effective import of nonlinear device characteristics into CAD for large signal power amplifier design. Presented at: IEEE MTT-S International Microwave Symposium Digest 2006. pp. 477-480., (10.1109/MWSYM.2006.249596)
- Aboush, Z., Benedikt, J., Priday, J. and Tasker, P. 2006. DC-50 GHz low loss thermally enhanced low cost LCP package process utilizing mico via technology. Presented at: 2006 IEEE Microwave Symposium, San Francisco, USA. pp. 961-964.
- Mayer, M., Arthaber, H., Magerl, G., Kother, D., Lees, J., Benedikt, J. and Tasker, P. 2006. Advanced load pull systems. Presented at: The Institution of Engineering and Technology Seminar on High Efficiency Power Amplifier Design for Next Generation Wireless Applications, Cambridge, UK. pp. 27-54.
- Lees, J., Sheikj, A., Benedikt, J. and Tasker, P. 2006. The Design of a Gallium Nitride Doherty Amplifier using Waveform Measurements and Active Harmonic Load-Pull. Presented at: 2006 International Workshop on Integrated Nonlinear Microwave and Millimeter-Wave Circuits, Aveiro, Portugal. pp. 26-29.
- Roff, R. et al. 2006. Detailed analysis of DC-RF dispersion in AIGaN/GaN NFETs using waveform measurements. Presented at: 1st European Microwave Integrated Circuits Conference (EuMIC), Manchester, UK. pp. 43-45.
- Tudor, W., Benedikt, J. and Tasker, P. J. 2006. Full functional 'real time' non-linear device characterization system incorporating active load control. Presented at: 36th European Microwave Conference. pp. 1610-1613.
- Uren, M. J. et al. 2006. Control of short-channel effects in GaN/AIGaN HFETs. Presented at: 1st European Microwave Integrated Circuits Conference, Manchester, UK. pp. 65-68.
- Uren, M. et al. 2006. Control of Short-Channel Effects in GaN/AlGaN HFETs. Presented at: 1st European Microwave Integrated Circuits Conference, Manchester, UK, 10-13 Sept 20062006 European Microwave Integrated Circuits Conference. IEEE pp. 65-65., (10.1109/EMICC.2006.282751)
2005
- Aboush, Z., Lees, J., Benedikt, J. and Tasker, P. J. 2005. Active harmonic load-pull system for characterising highly mismatched high power transistors. Presented at: IEEE MTT-S International Microwave Symposium Digest 2005, 2005. , (10.1109/MWSYM.2005.1516920)
- Williams, T., Tasker, P. J. and Benedikt, J. 2005. Experimental evaluation of an active envelope load pull architecture for high speed device characterization. Presented at: IEEE MTT-S International Microwave Symposium Digest 2005. IEEE, (10.1109/MWSYM.2005.1516980)
- Aboush, Z., Benedikt, J., Priday, J. and Tasker, P. 2005. Novel cost-efficient packaging technology for high-power LDMOS devices. Presented at: 10th IEEE High Frequency Postgraduate Student Colloquium, Leeds, UK. pp. 15-18.
- Aboush, Z. et al. 2005. High power active harmonic load-pull system for characterisation of high power 100-Watt transistors. Presented at: 35th European Microwave Conference, Paris, France, Vol. 1. pp. 609-612., (10.1109/EUMC.2005.1608930)
- Alghanim, A., Benedikt, J. and Tasker, P. 2005. A measurement test-set for characterisation of high power LDMOS transistors including memory effects. Presented at: 10th IEEE High Frequency Postgraduate Student Colloquium, Leeds, UK. pp. 29-32.
- Lees, J. et al. 2005. Experimental gallium nitride microwave Doherty amplifier. IEEE Electronic Letters 41(23), pp. 1284-1285. (10.1049/el:20053155)
- McGovern, P. et al. 2005. Analysis of DC-RF dispersion in AlGaN/GaN HFETs using pulsed I-V and time-domain waveform measurements. Presented at: Microwave Symposium Digest, IEEE MTT-S International, Atlanta, USA. pp. 503-506.
- Qi, H., Benedikt, J. and Tasker, P. 2005. Direct extraction of large-signal table-based behavioural models from time-domain voltage and current waveforms. Presented at: 10th IEEE High Fequency Postgraduate Student Colloquium, Leeds, UK. pp. 25-28.
- Kharji, O. A., Williams, T., Benedikt, J. and Tasker, P. 2005. A broadband envelope load pull system. Presented at: 10th IEEE High Frequency Postgraduate Student Colloquium, Leeds, UK. pp. 21-24.
- Lees, J. et al. 2005. A comparison of load-pull measurement results of a 4W Phemt involving five European laboratories. Presented at: European Gallium Arsenide and Other Semiconductor Application Symposium, Paris, France, 3-4 October, 2005Proceedings of the European Gallium Arsenide and Other Semiconductor Application Symposium Paris, France,3-4 October, 2005. IEEE pp. 321-324.
- Lees, J. et al. 2005. Characterisation of an experimental gallium nitride microwave Doherty amplifier. Presented at: 35th European Microwave Conference, Paris, France, 4-6 October 200535th European Microwave Conference: conference proceedings. Horizon House
- Williams, T., Benedikt, J. and Tasker, P. J. 2005. Application of a novel active envelope load pull architecture in large signal device characterisation. Presented at: 35th European Microwave Conference, Paris, France.
2004
- McGovern, P. et al. 2004. Single-tone and two-tone time-domain large signal characterization of GaN HFETs operated in class A. Presented at: IEEE MTT-S International Microwave Symposium Digest 2004, Vol 2, 2004. pp. 825-828., (10.1109/MWSYM.2004.1339092)
- Aboush, Z., Benedikt, J. and Tasker, P. 2004. High power harmonic active load-pull using broadband matching networks. Presented at: 9th IEEE High Frequency Postgraduate Student Colloquium, Manchester, UK. pp. 145-150.
- Lees, J., Haczewski, J., Benedikt, J. and Tasker, P. 2004. An automated multi-stimulus measurement system for characterising multi-device amplifiers. Presented at: 34th European Microwave Conference, Amsterdam, The Netherlands, Vol. Nov-15. pp. 435-438.
- Williams, T., Benedikt, J. and Tasker, P. J. 2004. Novel base-band envelope load pull architecture. Presented at: 9th IEEE High Frequency Postgraduate Student Colloquium, Manchester, UK. pp. 157-161.
2003
- Lees, J., Goss, M., Benedikt, J. and Tasker, P. 2003. Single-tone optimisation of an adaptive-bias Doherty structure. Presented at: Microwave Symposium Digest, IEEE MTT-S International, Philadelphia, USA, 8-13 June 2003Microwave Symposium Digest, IEEE MTT-S International, Vol. 3. IEEE pp. 2213-2216., (10.1109/MWSYM.2003.1210604)
2002
- Benedikt, J. and Tasker, P. 2002. High power time-domain measurement bench for power amplifier development. Presented at: Asia-Pacific Microwave Conference, Institute of Electronics, Information and Communication Engineers (IEICE), Kyoto, Japan. pp. 303-306.
- Tasker, P. J. and Benedikt, J. 2002. High-power time-domain measurement bench for power amplifier development. Presented at: 59th ARFTG Conference Digest, Seattle, USA. pp. 107-110.
2001
- Gaddi, R., Pla, J. A., Benedikt, J. and Tasker, P. J. 2001. LDMOS electro-thermal model validation from large-signal time-domain measurement. Presented at: IEEE MTT-S International Microwave Symposium Digest 2001, Phoenix, AZ, USA, 20-25 May 2001Microwave Symposium Digest, IEEE MTT-S International (Phoenix, USA), Vol. 1. pp. 399-402.
2000
- Benedikt, J., Gaddi, R., Tasker, P. J. and Goss, M. 2000. High-power time-domain measurement system with active harmonic load-pull for high-efficiency base-station amplifier design. IEEE Transactions on Microwave Theory and Techniques 48(12), pp. 2617-2624. (10.1109/22.899021)
- Benedikt, J., Gaddi, R., Tasker, P. J., Goss, M. and Zadeh, M. 2000. High power time domain measurement system with active harmonic load-pull for high efficiency base station amplifier design. Presented at: 2000 IEEE MTT-S International Microwave Symposium, Boston, MA, USA, 11-16 June 2000 Presented at Perkins, T. ed.2000 IEEE MTT-S International Microwave Symposium Digest, Vol. 3. Los Alamitos, CA: IEEE pp. 1459-1462., (10.1109/MWSYM.2000.862249)
Articles
- Xu, Y., Benedikt, J. and Ye, L. 2024. Hyaluronic acid interacting molecules mediated crosstalk between cancer cells and microenvironment from primary tumour to distant metastasis. Cancers 16(10), article number: 1907. (10.3390/cancers16101907)
- You, F. and Benedikt, J. 2019. An optimized-load-impedance calculation and mining method based on i-v curves: Using broadband class-e power amplifier as example. IEEE Transactions on Industrial Electronics 66(7), pp. 5254-5263. (10.1109/TIE.2018.2868020)
- Liu, Z., Wu, Y., Zhao, C., Benedikt, J. and Kang, K. 2018. A 5-Gb/s 66 dB CMOS variable-gain amplifier with reconfigurable DC-offset cancellation for multi-standard applications. IEEE Access 6, pp. 54139-54146. (10.1109/ACCESS.2018.2867227)
- Song, Y. et al. 2017. A compact ka-band active integrated antenna with a GaAs amplifier in a ceramic package. IEEE Antennas and Wireless Propagation Letters 16, pp. 2416-2419. (10.1109/LAWP.2017.2721956)
- Ji, S., Hong, Y., Spencer, P. S., Benedikt, J. and Davies, I. 2017. Broad tunable photonic microwave generation based on period-one dynamics of optical injection vertical-cavity surface-emitting lasers. Optics Express 25(17), pp. 19863-19871. (10.1364/OE.25.019863)
- McGenn, W., Uren, M. J., Benedikt, J. and Tasker, P. J. 2012. Development of an RF IV waveform based stress test procedure for use on GaN HFETs. Microelectronics Reliability 52(12), pp. 2880-2883. (10.1016/j.microrel.2012.09.007)
- Carrubba, V., Akmal, M., Quay, R., Lees, J., Benedikt, J., Cripps, S. C. and Tasker, P. J. 2012. The Continuous Inverse Class-F Mode With Resistive Second-Harmonic Impedance. IEEE Transactions on Microwave Theory and Techniques 60(6), pp. 1928-1936. (10.1109/TMTT.2012.2189228)
- Hone, T. M. et al. 2012. Controlling Active Load-Pull in a Dual-Input Inverse Load Modulated Doherty Architecture. IEEE Transactions on Microwave Theory and Techniques 60(6), pp. 1797-1804. (10.1109/TMTT.2012.2190748)
- Smith, R. M., Lees, J., Tasker, P. J., Benedikt, J. and Cripps, S. C. 2012. A Novel Formulation for High Efficiency Modes in Push-Pull Power Amplifiers Using Transmission Line Baluns. IEEE Microwave and Wireless Components Letters 22(5), pp. 257-259. (10.1109/LMWC.2012.2191273)
- Akmal, M., Carrubba, V., Lees, J., Benedikt, J. and Tasker, P. J. 2012. An enhanced modulated waveform measurement system. Australian Journal of Electrical and Electronics Engineering 9(4), pp. 429-438. (10.7158/E11-033.2012.9.4)
- Carrubba, V., Clarke, A. L., Akmal, M., Lees, J., Benedikt, J., Tasker, P. J. and Cripps, S. C. 2011. On the extension of the continuous class-F mode power amplifier. IEEE Transactions on Microwave Theory and Techniques 59(5), pp. 1294-1303. (10.1109/TMTT.2011.2117435)
- Tasker, P. J. and Benedikt, J. 2011. Waveform inspired models and the harmonic balance emulator. IEEE Microwave Magazine 12(2), pp. 38-54. (10.1109/MMM.2010.940101)
- Hashmi, M. S., Clarke, A. L., Woodington, S. P., Lees, J., Benedikt, J. and Tasker, P. J. 2010. An accurate calibrate-able multiharmonic active load-pull system based on the envelope load-pull concept. IEEE Transactions on Microwave Theory and Techniques 58(3), pp. 656-664. (10.1109/TMTT.2010.2040403)
- Alghanim, A., Benedikt, J. and Tasker, P. 2010. Effect of low frequency memory on high power 12W LDMOS transistors intermodulation distortion. Proceedings of the World Academy of Science, Engineering and Technology 63, pp. 53-57.
- Hashmi, M. S., Benedikt, J. and Tasker, P. 2010. Impact of group delay on the load emulation in multi-tone active envelope load-pull system. Australian Journal of Electrical and Electronics Engineering 7(1), pp. 83-88.
- Wright, P., Lees, J., Benedikt, J., Tasker, P. and Cripps, S. C. 2009. A Methodology for Realizing High Efficiency Class-J in a Linear and Broadband PA. IEEE Transactions on Microwave Theory and Techniques 57(12), pp. 3196-3204. (10.1109/TMTT.2009.2033295)
- Cripps, S. C., Tasker, P., Clarke, A. L., Lees, J. and Benedikt, J. 2009. On the continuity of high efficiency modes in linear RF power amplifiers. IEEE Microwave and Wireless Components Letters 19(10), pp. 665-667. (10.1109/LMWC.2009.2029754)
- Sheikh, A., Roff, C., Benedikt, J., Tasker, P. J., Noori, B., Wood, J. and Aaen, P. H. 2009. Peak class F and inverse class F drain efficiencies using Si LDMOS in a limited bandwidth design. IEEE Microwave and Wireless Components Letters 19(7), pp. 473-475. (10.1109/LMWC.2009.2022138)
- Qi, H., Benedikt, J. and Tasker, P. 2009. Nonlinear Data Utilization: From Direct Data Lookup to Behavioral Modeling. IEEE Transactions on Microwave Theory and Techniques 57(6), pp. 1425-1432. (10.1109/TMTT.2009.2019996)
- Roff, C. et al. 2009. Analysis of DC-RF Dispersion in AlGaN/GaN HFETs Using RF Waveform Engineering. IEEE Transactions of Electron Devices 56(1), pp. 13-19. (10.1109/TED.2008.2008674)
- Alghanim, A., Lees, J., Williams, T., Benedikt, J. and Tasker, P. J. 2008. Sensitivity of electrical baseband memory effects to higher-order IF components for high-power LDMOS power amplifiers. Electronics Letters 44(5), pp. 358-359. (10.1049/el:20083348)
- Gaddi, R., Williams, T., Benedikt, J., Tasker, P., Giacomozzi, F., Margesin, B. and Gnudi, A. 2007. Large-Signal Vectorial Load - Pull Characterization of MEMS RF-Actuation. IEEE Microwave and Wireless Components Letters 17(12), pp. 903-905. (10.1109/LMWC.2007.908049)
- Lees, J. et al. 2005. Experimental gallium nitride microwave Doherty amplifier. IEEE Electronic Letters 41(23), pp. 1284-1285. (10.1049/el:20053155)
- Benedikt, J., Gaddi, R., Tasker, P. J. and Goss, M. 2000. High-power time-domain measurement system with active harmonic load-pull for high-efficiency base-station amplifier design. IEEE Transactions on Microwave Theory and Techniques 48(12), pp. 2617-2624. (10.1109/22.899021)
Conferences
- Alimohammadi, Y. et al. 2021. Incorporating gate-lag effects into the Cardiff Behavioural Model. Presented at: 50th European Microwave Conference (EuMC 2020), Utrecht, Netherlands, 12-14 January 20212020 50th European Microwave Conference (EuMC). IEEE pp. 684-687., (10.23919/EuMC48046.2021.9338185)
- Alimohammadi, Y. et al. 2020. Pulse profiling active load pull measurements. Presented at: IEEE/MTT-S International Microwave Symposium (IMS 2020), Los Angeles, CA, USA, 4-6 August 20202020 IEEE/MTT-S International Microwave Symposium (IMS). IEEE pp. 759-762., (10.1109/IMS30576.2020.9223989)
- Zhao, Z. et al. 2020. Abstract P3-01-18: Kinase D interacting substrate 220 (Kidins220) and disease progression of breast cancer, the role of heat shock protein90 (HSP90). Presented at: San Antonio Breast Cancer Symposium, San Antonio, TX, United States, 10-14 December 2019, Vol. 80. Vol. 4, Sup. American Association for Cancer Research pp. P3-01-18., (10.1158/1538-7445.SABCS19-P3-01-18)
- Zhao, Z. et al. 2020. Abstract P2-07-01: Kidins220 (kinase D interacting substrate 220) has a connection with neutrotrophic related factors, BDNF and NGF, in human breast cancer. Presented at: San Antonio Breast Cancer Symposium, San Antonio, TX, United States, 10-14 December 2019, Vol. 80. Vol. 4, Sup. pp. P2-07-01., (10.1158/1538-7445.SABCS19-P2-07-01)
- Chaudhary, M. A., Yusoff, Z., Lees, J., Benedikt, J. and Tasker, P. 2019. Auxiliary envelope tracking focused investigations of a 10W GaN HEMTs device. Presented at: 3rd International Conference on Circuits, Systems and Devices (ICCSD), Chengdu, China, 23-25 Aug 2017Proceedings of 3rd International Conference on Circuits, Systems and Devices (ICCSD). IEEE pp. 92., (10.1109/ICCSD.2019.8843202)
- Al-Rawachy, A., Husseini, T., Benedikt, J., Tasker, P. and Bell, J. 2019. Cardiff behavioural model analysis using a two-tone stimulus. Presented at: 2019 IEEE Topical Conference on RF/Microwave Power Amplifiers for Radio and Wireless Applications (PAWR), Orlando, FL, USA, 20-23 January 20192019 IEEE Topical Conference on RF/Microwave Power Amplifiers for Radio and Wireless Applications (PAWR). IEEE pp. 5-8., (10.1109/PAWR.2019.8708726)
- Syed Anera, S. M. H. et al. 2019. High-efficiency broadband PA design based on continuous Class-F mode with compression. Presented at: 2019 IEEE MTT-S International Microwave Symposium, IMS 2019, Boston, USA, 2 -7 June 2019MTT-S International Microwave Symposium (IMS). IEEE pp. 698-701., (10.1109/MWSYM.2019.8700767)
- Al-Rawachy, A., Husseini, T., Benedikt, J., Bell, J. and Tasker, P. 2019. Behavioural model extraction using novel multitone active load-pull. Presented at: 2019 IEEE MTT-S International Microwave Symposium, IMS 2019, Boston, USA, 2 -7 June 2019MTT-S International Microwave Symposium (IMS). IEEE pp. 196-199., (10.1109/MWSYM.2019.8700779)
- Husseini, T., Al-Rawachy, A., Benedikt, J., Bell, J. and Tasker, P. 2019. Global behavioural model generation using coefficients interpolation. Presented at: 2019 IEEE MTT-S International Microwave Symposium, IMS 2019, Boston, USA, 2 -7 June 2019. pp. -.
- Husseini, T., Al-Rawachy, A., Benedikt, J., Bel, J. and Tasker, P. 2018. Automating the accurate extraction and verification of the Cardiff Model via the direct measurement of load-pull power contours. Presented at: 2018 IEEE/MTT-S International Microwave Symposium - IMS, Philadelphia, PA, USA, 10-15 June 20182018 IEEE/MTT-S International Microwave Symposium - IMS. IEEE pp. 544., (10.1109/MWSYM.2018.8439581)
- Husseini, T., Al-Rawachy, A., Anera, S. S., Bell, J., Tasker, P. and Benedikt, J. 2018. On the effective modeling of the test-set non-linearity. Presented at: 2018 91st ARFTG Microwave Measurement Conference (ARFTG), Philadelphia, PA, USA, 15 June 20182018 91st ARFTG Microwave Measurement Conference (ARFTG). IEEE, (10.1109/ARFTG.2018.8423832)
- Chaudhary, M. A., Memon, Z. A., Yusoff, Z., Lees, J., Benedikt, J. and Tasker, P. 2018. Optimization of out-of-band impedance environment for linearity improvements of microwave power transistors. Presented at: 2018 5th International Conference on Electrical and Electronic Engineering (ICEEE), Istanbul, Turkey, 3-5 May 20182018 5th International Conference on Electrical and Electronic Engineering (ICEEE). IEEE pp. 219-223., (10.1109/ICEEE2.2018.8391334)
- Chaudhary, M. A., Memon, Z. A., Lees, J., Benedikt, J. and Tasker, P. 2018. Multitone measurement system for linearity investigations of microwave devices. Presented at: International Multi-Topic Conference (Inmic), Lahore, Pakistan, 24-26 Nov 2017International Multi-Topic Conference (Inmic). IEEE, (10.1109/INMIC.2017.8289455)
- Ji, S., Hong, Y., Spencer, P. S., Benedikt, J. and Davies, I. 2017. Broad tunable photonic microwave source using a single-mode VCSEL subject to parallel optical injection. Presented at: Lasers and Electro-Optics Europe & European Quantum Electronics Conference (CLEO/Europe-EQEC), Munich, Germany, 25-29 June 20172017 Conference on Lasers and Electro-Optics Europe & European Quantum Electronics Conference (CLEO/Europe-EQEC). IEEE pp. 1., (10.1109/CLEOE-EQEC.2017.8086553)
- Chaudhary, M. A., Memon, Z. A., Yusoff, Z., Lees, J., Benedikt, J. and Tasker, P. J. 2017. Characterization of baseband electrical memory in microwave devices using multi-tone measurement system. Presented at: 2016 16th Mediterranean Microwave Symposium (MMS), 14-16 November 201616th Mediterranean Microwave Symposium (MMS), 2016. IEEE pp. 1., (10.1109/MMS.2016.7803811)
- Chaudhary, M. A., Lees, J., Benedikt, J. and Tasker, P. J. 2016. Modulated waveform measurement and engineering system. Presented at: 2015 2nd International Conference on Electronics and Communication Systems (ICECS), Cairo, Egypt, 6-9 December 20152015 IEEE International Conference on Electronics, Circuits, and Systems (ICECS 2015). Institute of Electrical and Electronics Engineers (IEEE) pp. 252-255., (10.1109/ICECS.2015.7440296)
- Ogboi, F. L. et al. 2014. Investigation of various envelope complexity linearity under modulated stimulus using a new envelope formulation approach. Presented at: 83rd ARFTG Microwave Measurement Conference 2014, Tampa, USA, 1 - 6 June 2014Compound Semiconductor Integrated Circuit Symposium (CSICs), 2014 IEEE. IEEE pp. 1-4., (10.1109/CSICS.2014.6978563)
- Ogboi, F. L. et al. 2014. High bandwidth investigations of a baseband linearization approach formulated in the envelope domain under modulated stimulus. Presented at: European Microwave Conference (EuMC) 2014, Rome, Italy, 6-9 October 2014European Microwave Conference (EuMC), Vol. 44. IEEE pp. 1305-1308., (10.1109/EuMC.2014.6986683)
- Ogboi, F. L. et al. 2014. Sensitivity of AM/AM linearizer to AM/PM distortion in devices. Presented at: 83rd ARFTG Microwave Measurement Conference 2014, Tampa, FL, USA, 6 June 2014ARFTG Microwave Measurement Conference (ARFTG), 2014 83rd. IEEE pp. 1-4., (10.1109/ARFTG.2014.6899507)
- Ogboi, F. L. et al. 2013. A LSNA configured to perform baseband engineering for device linearity investigations under modulated excitations. Presented at: 43rd European Microwave Conference, Nuremberg, Germany, 7-10 October 2013Proceedings of the 43rd European Microwave Conference. pp. 684-687.
- Chaudhary, M. A., Memon, Z. A., Lees, J., Benedikt, J. and Tasker, P. J. 2013. Investigation of baseband electrical memory effects on the dynamic characteristics of power transistors. Presented at: 2013 16th International Multi Topic Conference (INMIC), Lahore, Pakistan, 19-20 December 2013Multi Topic Conference (INMIC), 2013 16th International. IEEE pp. 106-109., (10.1109/INMIC.2013.6731333)
- Chaudhary, M. A., Lees, J., Benedikt, J. and Tasker, P. J. 2013. Reduction of baseband electrical memory effects using broadband active baseband load-pull. Presented at: 2013 IEEE International Wireless Symposium (IWS), Beijing, China, 14-18 April 2013Wireless Symposium (IWS), 2013 IEEE International. IEEE pp. 1-4., (10.1109/IEEE-IWS.2013.6616709)
- Hone, T. M. et al. 2013. Inverse active load-pull in an inverse Doherty amplifier. Presented at: 2013 IEEE Topical Conference on Power Amplifiers for Wireless and Radio Applications, Santa Clara, CA, USA, 20 Jauary 2013Power Amplifiers for Wireless and Radio Applications (PAWR), 2013 IEEE Topical Conference on. IEEE pp. 4-6., (10.1109/PAWR.2013.6490170)
- Bensmida, S. et al. 2012. Nonlinear envelope tracking for efficiency optimization of power amplifiers. Presented at: 7th European Microwave Integrated Circuits Conference (EuMIC) 2012, Amsterdam, The Netherlands, 29-30 October 20127th European Microwave Integrated Circuits Conference (EuMIC), 2012. Picastaway, NJ: IEEE pp. 480-483.
- McGenn, W., Choi, H., Lees, J., Uren, M. J., Benedikt, J. and Tasker, P. J. 2012. Development of a RF waveform stress test procedure for GaN HFETs subjected to infinite VSWR sweeps. Presented at: 2012 IEEE MTT-S International Microwave Symposium Digest, Montreal, Canada, 17-22 June 2012Microwave Symposium Digest (MTT), 2012 IEEE MTT-S International. IEEE pp. 1-3., (10.1109/MWSYM.2012.6259725)
- Carrubba, V. et al. 2012. Continuous-ClassF3 power amplifier mode varying simultaneously first 3 harmonic impedances. Presented at: 2012 IEEE MTT-S International Microwave Symposium Digest, Montreal, Canada, 17-22 June 2012Microwave Symposium Digest (MTT), 2012 IEEE MTT-S International. IEEE pp. 1-3., (10.1109/MWSYM.2012.6258343)
- Smith, R. M., Lees, J., Tasker, P. J., Benedikt, J. and Cripps, S. C. 2012. A 40W push-pull power amplifier for high efficiency, decade bandwidth applications at microwave frequencies. Presented at: 2012 IEEE MTT-S International Microwave Symposium Digest (MTT, Montreal, Canada, 17-22 June 2012Microwave Symposium Digest (MTT), 2012 IEEE MTT-S International. IEEE pp. 1-3., (10.1109/MWSYM.2012.6259418)
- Tasker, P. J., Carrubba, V., Wright, P., Lees, J., Benedikt, J. and Cripps, S. C. 2012. Wideband PA design: The "continuous" mode of operation. Presented at: Compound Semiconductor Integrated Circuit Symposium (CSICS), La Jolla, CA, USA, 14-17 October 2012Compound Semiconductor Integrated Circuit Symposium (CSICS), 2012 IEEE. IEEE pp. 1-4., (10.1109/CSICS.2012.6340048)
- Mimis, K., Morris, K. A., Beach, M. A., McGeehan, J. P., Lees, J., Benedikt, J. and Tasker, P. J. 2012. Overlapped segment piece-wise polynomial pre-distortion for the linearisation of power amplifiers in the presence of high PAPR OFDM signals. Presented at: 2012 IEEE MTT-S International Microwave Symposium Digest, Montreal, Canada, 17-22 June 2012Microwave Symposium Digest (MTT), 2012 IEEE MTT-S International. pp. 1-3., (10.1109/MWSYM.2012.6259543)
- Akmal, M. et al. 2012. Characterization of electrical memory effects for complex multi-tone excitations using broadband active baseband load-pull. Presented at: 7th European Microwave Integrated Circuits Conference, Amsterdam, The Netherlands, 29-30 October 20127th European Microwave Integrated Circuits Conference (EuMIC), 2012. Picastaway, NJ: IEEE pp. 885-888.
- Yusoff, Z. B., Akmal, M., Carrubba, V., Lees, J., Benedikt, J., Tasker, P. J. and Cripps, S. C. 2011. The benefit of GaN characteristics over LDMOS for linearity improvement using drain modulation in power amplifier system. Presented at: 2011 Workshop on Integrated Nonlinear Microwave and Millimetre-Wave Circuits, Vienna, Austria, 18-19 April 20112011 Workshop on Integrated Nonlinear Microwave and Millimetre-Wave Circuits (INMMIC 2011). New York: IEEE pp. 109-112., (10.1109/INMMIC.2011.5773334)
- Carrubba, V., Lees, J., Benedikt, J., Tasker, P. J. and Cripps, S. C. 2011. A novel highly efficient broadband continuous class-F RFPA delivering 74% average efficiency for an octave bandwidth. Presented at: 2011 IEEE/MTT-S International Microwave Symposium, Baltimore, MD, USA, 5-10 June 20112011 IEEE/MTT-S International Microwave Symposium - MTT 2011. New York: IEEE pp. 350-353., (10.1109/MWSYM.2011.5972701)
- Yusoff, Z. B., Lees, J., Benedikt, J., Tasker, P. J. and Cripps, S. C. 2011. Linearity improvement in RF power amplifier system using integrated Auxiliary Envelope Tracking system. Presented at: 2011 IEEE/MTT-S International Microwave Symposium, Baltimore, MD, USA, 5-10 June 2011 Presented at Seigel, P. et al. eds.2011 IEEE/MTT-S International Microwave Symposium - MTT 2011. New York: IEEE pp. 1752-1755., (10.1109/MWSYM.2011.5972769)
- FitzPatrick, D., Saini, R., Lees, J., Benedikt, J., Cripps, S. C. and Tasker, P. J. 2011. A waveform engineering approach to the design of improved efficiency wideband MMIC amplifiers. Presented at: Wireless and Microwave Technology Conference (WAMICON), 2011 IEEE 12th Annual., Clearwater Beach, FL, USA, 18-19 April 20112011 IEEE 12th Annual Wireless and Microwave Technology Conference (WAMICON), Clearwater Beach, FL, 18-19 April 2011. Los Alamitos, CA: IEEE pp. 225-230., (10.1109/WAMICON.2011.5872859)
- Akmal, M. et al. 2011. Linearity enhancement of GaN HEMTs under complex modulated excitation by optimizing the baseband impedance environment. Presented at: 2011 IEEE/MTT-S International Microwave Symposium, Baltimore, MD, USA, 5-10 June 2011 Presented at Seigel, P. et al. eds.2011 IEEE/MTT-S International Microwave Symposium - MTT 2011. New York: IEEE pp. 1747-1750., (10.1109/MWSYM.2011.5972833)
- Smith, R. M., Cripps, S. C., Tasker, P. J., Benedikt, J. and Lees, J. 2011. A design methodology for the realization of multi-decade baluns at microwave frequencies. Presented at: 2011 IEEE/MTT-S International Microwave Symposium, Baltimore, MD, USA, 5-10 June 2011 Presented at Seigel, P. et al. eds.2011 IEEE/MTT-S International Microwave Symposium - MTT 2011. New York: IEEE pp. 1204-1208., (10.1109/MWSYM.2011.5972702)
- Bell, J. J., Saini, R., Woodington, S. P., Lees, J., Benedikt, J., Cripps, S. C. and Tasker, P. J. 2011. Behavioral model analysis using simultaneous active fundamental load-pull and harmonic source-pull measurements at X-band. Presented at: 2011 IEEE/MTT-S International Microwave Symposium, Baltimore, MD, USA, 5-10 June 2011Microwave Symposium Digest (MTT), 2011 IEEE MTT-S International. New York: IEEE pp. 982-986., (10.1109/MWSYM.2011.5972803)
- Powell, J. R. et al. 2011. GaAs X-band high efficiency (65%) broadband (30%) amplifier MMIC based on the Class B to Class J continuum. Presented at: 2011 IEEE/MTT-S International Microwave Symposium, Baltimore, MD, USA, 5-10 June 2011 Presented at Seigel, P. et al. eds.2011 IEEE/MTT-S International Microwave Symposium - MTT 2011. New York: IEEE pp. 355., (10.1109/MWSYM.2011.5973350)
- Saini, R. et al. 2011. High speed non-linear device characterization and uniformity investigations at X-band frequencies exploiting behavioral models. Presented at: 2011 77th ARFTG Microwave Measurement Conference (ARFTG), Baltimore, MD, USA, 10 June 2011Design and Measurement of Microwave Systems - Proceedings of the 2011 77th ARFTG Microwave Measurement Conference (ARFTG). Los Alamitos, CA: IEEE, (10.1109/ARFTG77.2011.6034552)
- Carrubba, V. et al. 2011. High-speed device characterization using an active load-pull system and waveform engineering postulator. Presented at: 2011 77th ARFTG Microwave Measurement Conference (ARFTG), Baltimore, MD, USA, 10 June 2011Design and Measurement of Microwave Systems - Proceedings of the 2011 77th ARFTG Microwave Measurement Conference (ARFTG). Los Alamitos, CA: IEEE, (10.1109/ARFTG77.2011.6034553)
- Canning, T. A. J., Almuhaisen, A., Lees, J., Benedikt, J., Cripps, S. C. and Tasker, P. J. 2011. Utilization of RF I-V waveform load-pull information to identify the role FET knee profile has on locating the efficiency maxima. Presented at: 2011 78th ARFTG Microwave Measurement Symposium (ARFTG), Tempe, AZ, USA, 1-2 December 2011Proceedings of the 2011 78th ARFTG Microwave Measurement Symposium (ARFTG) - High Power RF Measurement Techniques. Los Alamitos, CA: IEEE, (10.1109/ARFTG78.2011.6183864)
- Saini, R., Bell, J. J., Williams, T., Lees, J., Benedikt, J. and Tasker, P. J. 2011. Interpolation and extrapolation capabilities of non-linear behavioural models. Presented at: 2011 78th ARFTG Microwave Measurement Symposium (ARFTG), Tempe, AZ, USA, 1-2 December 2011Proceedings of the 2011 78th ARFTG Microwave Measurement Symposium (ARFTG) - High Power RF Measurement Techniques. Los Alamitos, CA: IEEE, (10.1109/ARFTG78.2011.6183865)
- Casbon, M. A., Tasker, P. J. and Benedikt, J. 2011. Waveform Engineering beyond the Safe Operating Region: Fully Active Harmonic Load Pull Measurements under Pulsed Conditions. Presented at: 2011 IEEE Compound Semiconductor Integrated Circuit Symposium (CSICS), Waikoloa, HI, USA, 16-19 October 2011Proceedings of the 2011 IEEE Compound Semiconductor Integrated Circuit Symposium (CSICS) - INTEGRATED CIRCUITS IN GaAs, InP, SiGe, GaN and Other Compound Semiconductors. Los Alamitos, CA: IEEE, (10.1109/CSICS.2011.6062435)
- Carrubba, V. et al. 2011. Exploring the Design Space for Broadband PAs using the Novel "Continuous Inverse Class-F Mode". Presented at: 6th European Microwave Integrated Circuits Conference (EuMIC) 2011, Manchester, UK, 10-11 October 2011Proceedings of the 41st European Microwave Conference (EuMC). IEEE pp. 333-336.
- Hone, T. et al. 2011. Optimized load modulation in a doherty amplifier using a current injection technique. Presented at: 6th European Microwave Integrated Circuits Conference (EuMIC) 2011, Manchester, UK, 10-11 October 2011Proceedings of the 6th European Microwave Integrated Circuits Conference (EuMIC). Los Alamitos, CA: IEEE pp. 296-299.
- Akmal, M. et al. 2011. An enhanced modulated waveform measurement system for the robust characterization of microwave devices under modulated excitation. Presented at: Microwave Integrated Circuits Conference (EuMIC), 2011 European, Manchester, 10-11 October 2011Microwave Integrated Circuits Conference (EuMIC), 2011 European. IEEE pp. 180-183.
- McGenn, W., Benedikt, J., Tasker, P. J., Powell, J. and Uren, M. 2011. RF waveform investigation of VSWR sweeps on GaN HFETs. Presented at: 6th European Microwave Integrated Circuits Conference (EuMIC) 2011, Manchester, UK, 10-11 October 2011Proceedings of the 6th European Microwave Integrated Circuits Conference (EuMIC). Los Alamitos, CA: IEEE pp. 17-20.
- Paynter, M. et al. 2011. Non-linear large signal PA modelling for switching-mode operation (class-F/continuous class-F). Presented at: 6th European Microwave Integrated Circuits Conference (EuMIC) 2011, Manchester, UK, 10-11 October 2011Proceedings of the 6th European Microwave Integrated Circuits Conference (EuMIC). Los Alamitos, CA: IEEE pp. 152-155.
- Almuhaisen, A., Lees, J., Cripps, S. C., Tasker, P. J. and Benedikt, J. 2011. Wide band high-efficiency power amplifier design. Presented at: 6th European Microwave Integrated Circuits Conference (EuMIC) 2011, Manchester, UK, 10-11 October 2011Proceedings of the 6th European Microwave Integrated Circuits Conference (EuMIC). Los Alamitos, CA: IEEE pp. 184-187.
- Clarke, A. L., Akmal, M., Lees, J., Tasker, P. J. and Benedikt, J. 2010. Investigation and analysis into device optimization for attaining efficiencies in-excess of 90% when accounting for higher harmonics. Presented at: IEEE MTT-S International Microwave Symposium, Anaheim, CA, USA, 23-28 May 20102010 IEEE MTT-S International Microwave Symposium Digest (MTT 2010). New York: IEEE pp. 1114-1117., (10.1109/MWSYM.2010.5517222)
- Akmal, M. et al. 2010. The effect of baseband impedance termination on the linearity of GaN HEMTs. Presented at: European Microwave Conference 2010, Paris, France. Vol. 561636. pp. 1046-1049.
- Akmal, M. et al. 2010. The impact of baseband electrical memory effects on the dynamic transfer characteristics of microwave power transistors. Presented at: 2010 Workshop on Integrated Nonlinear Microwave and Millimetre-Wave Circuits (INMMIC), Gothenburg, Sweden. Vol. 548011. pp. 148-151.
- Hashim, S., Hashmi, M. S., Benedikt, J. and Tasker, P. J. 2010. Effect of impedance variation around the fundamentals on PA distortions characteristics under wideband multi-tone stimulus. Presented at: IEEE Asia Pacific Conference on Circuits and Systems, Kuala Lumpur, Malaysia, 6-9 December 2010 Presented at Rohani, F. Z. et al. eds.Proceedings of the 2010 Asia Pacific Conference on Circuit and System, 6th – 9th December 2010, Kuala Lumpur, Malaysia. Los Alamitos, CA: IEEE pp. 1115-1118., (10.1109/APCCAS.2010.5775081)
- Mashad Nemati, H. et al. 2010. Evaluation of a GaN HEMT transistor for load- and supply-modulation applications using intrinsic waveform measurements. Presented at: IEEE MTT 2010 International Microwave Symposium, Anaheim, CA, USA, 23-28 May 20102010 IEEE MTT-S International Microwave Symposium Digest (MTT 2010). Piscataway, NJ: IEEE pp. 509-512., (10.1109/MWSYM.2010.5517696)
- Woodington, S. P., Saini, R., Williams, D., Lees, J., Benedikt, J. and Tasker, P. J. 2010. Behavioral model analysis of active harmonic load-pull measurements. Presented at: IEEE MTT-S International Microwave Symposium, Anaheim, CA, USA, 23-28 May 2010Microwave Symposium Digest (MTT), 2010 IEEE MTT-S International. New York: IEEE pp. 1688-1691., (10.1109/MWSYM.2010.5517261)
- Almuhaisen, A., Wright, P. T., Lees, J., Tasker, P. J., Cripps, S. C. and Benedikt, J. 2010. Novel wide band high-efficiency active harmonic injection power amplifier concept. Presented at: IEEE MTT-S International Microwave Symposium, Anaheim, CA, USA, 23-28 May 20102010 IEEE MTT-S International Microwave Symposium Digest (MTT 2010). New York: IEEE pp. 664-667., (10.1109/MWSYM.2010.5514759)
- FitzPatrick, D. M., Williams, T., Lees, J., Benedikt, J., Cripps, S. C. and Tasker, P. 2010. Exploitation of active load-pull and DLUT models in MMIC design. Presented at: IEEE Radio Frequency Integrated Circuits Symposium, Anaheim, CA, USA, 23-25 May 2010Proceedings of the 2010 IEEE Radio Frequency Integrated Circuits Symposium May 23-25, 2010, Anaheim, California, USA. Piscataway, NJ: IEEE pp. 487-490., (10.1109/RFIC.2010.5477406)
- McGenn, W., Powell, J., Uren, M., Benedikt, J. and Tasker, P. 2010. RF waveform method for the determination of the safe operating area of GaN HFET's for amplifiers subjected to high output VSWR. Presented at: European Microwave Week 2010: Connecting the World, (EuMIC 2010), Paris, France. Vol. 561371. pp. 282-285.
- Bensmida, S. et al. 2010. Generic pre-distortion of a Class-J Power amplifier. Presented at: European Microwave Conference 2010, Paris, France. Vol. 561648. pp. 1022-1025.
- Carrubba, V., Clarke, A. L., Akmal, M., Lees, J., Benedikt, J., Tasker, P. and Cripps, S. C. 2010. The continuous Class-F Mode mode power amplifier. Presented at: European Microwave Conference (EuMC) 2010, Paris, France. Vol. 561630. pp. 1674-1677.
- Lees, J. et al. 2010. Waveform engineering applied to linear-efficient PA design. Presented at: 2010 IEEE 11th Annual Wireless and Microwave Technology Conference (WAMICON 2010), Melbourne Beach, USA, 12-13 April, 2010. Vol. 546184., (10.1109/WAMICON.2010.5461847)
- Saini, R., Woodington, S. P., Lees, J., Benedikt, J. and Tasker, P. J. 2010. An intelligence driven active loadpull system. Presented at: 75th ARFTG Microwave Measurement Conference: Measurement of Modulated Signals for Communications, Anaheim, USA. Vol. 549632.
- Akmal, M. et al. 2010. Minimization of baseband electrical memory effects in GaN HEMTs using active IF load-pull. Presented at: Asia-Pacific Microwave Conference (22nd : 2010), Yokahama-shi, Japan, 7-10 December 20102010 Asia-Pacific Microwave Conference proceedings : APMC 2010 : Dec. 7-10, Yokohama, Japan. Tokyo, Japan: Institute of Electronics, Information and Communication Engineers (IEICE) pp. 5-8.
- Fitzpatrick, D. M., Lees, J., Sheikh, A., Benedikt, J. and Tasker, P. J. 2009. Systematic investigation of the impact of harmonic termination in the efficiency performance of above octave bandwidth microwave amplifiers. Presented at: European Microwave Conference, 2009 (EuMC 2009), Rome, Italy, 29 September - 1 October 2009European Microwave Week 2009 - "Science, Progress and Quality at Radiofrequencies": Conference Proceedings. London: Horizon House Publications pp. 1445-1448.
- Hashim, S. J., Hashmi, M. S., Williams, T., Woodington, W., Benedikt, J. and Tasker, P. 2009. Active envelope load-pull for wideband multi-tone stimulus incorporating delay compensation. Presented at: 38th European Microwave Conference, 2008 (EuMC 2008), Amsterdam, The Netherlands, 27-31 October 2008Proceedings of the 38th European Microwave Conference, 2008 (EuMC 2008). Los Alamitos, CA: IEEE pp. 317-320., (10.1109/EUMC.2008.4751452)
- Sheikh, A., Lees, J., Benedikt, J. and Tasker, P. J. 2009. Utilization of a measurement based CAD tool for enhanced pa design investigations. Presented at: 38th European Microwave Conference, 2008 (EuMC 2008), Amsterdam, The Netherlands, 27-31 October 2008Proceedings of the 38th European Microwave Conference, 2008 (EuMC 2008). Los Alamitos, CA: IEEE pp. 1671-1674., (10.1109/EUMC.2008.4751795)
- Hashmi, M. S., Clarke, A. L., Woodington, S. P., Lees, J., Benedikt, J. and Tasker, P. 2009. Electronic Multi-Harmonic Load-Pull System for Experimentally Driven Power Amplifier Design Optimization. Presented at: IEEE/MTT-S International Microwave Symposium 2009, Boston, USA. pp. 1549-1552.
- Kang, I., Zhang, H., Yun, Y., Tasker, P., Benedikt, J. and Porch, A. 2009. High quality factor extraction of miniaturised coupled line bandpass filter implemented using RF silicon integrated circuits. Presented at: Proceedings 39th European Microwave Conference (EuMC 2009), Rome, Italy. pp. 830-833., (10.1109/EUMC.2009.5295966)
- Wright, P. T., Lees, J., Tasker, P. J., Benedikt, J. and Cripps, S. C. 2009. An Efficient, Linear, Broadband Class-J-Mode PA Realised Using RF. Presented at: IEEE/MTT-S International Microwave Symposium 2009, Boston, MA, USA, 7-12 June 2009IEEE MTT-S International Microwave Symposium Digest, 2009. MTT '09. Los Alamitos, CA: IEEE pp. 653-656., (10.1109/MWSYM.2009.5165781)
- Bensmida, S. et al. 2009. Power amplifier memory-less pre-distortion for 3GPP LTE application. Presented at: European Microwave Conference, 2009 (EuMC 2009), Rome, Italy, 29 September - 1 October 2009European Microwave Week 2009 - "Science, Progress and Quality at Radiofrequencies": Conference Proceedings. London: Horizon House Publications pp. 1433-1436.
- Alghanim, A., Lees, J., Williams, T., Benedikt, J. and Tasker, P. 2008. Reduction of electrical baseband memory effect in high-power LDMOS devices using optimum termination for IMD3 and IMD5 using active load-pull. Presented at: IEEE MTT-S International Microwave Symposium Digest, Atlanta, USA. pp. 415-418., (10.1109/MWSYM.2008.4633191)
- FitzPatrick, D. M., Williams, T., Lees, J., Benedikt, J. and Tasker, P. 2008. Large signal device characterisation using active load-pull for improved MMIC design. Presented at: IET Seminar on RF and Microwave IC Design, London, UK. IET pp. 1-7.
- Hashmi, M. S., Hashim, S. J., Woodington, S., Williams, T., Benedikt, J. and Tasker, P. 2008. Active envelope load pull system suitable for high modulation rate multi-tone applications. Presented at: Integrated Nonlinear Microwave & Millimetre-Wave Circuits 2008 Workshop (INMMIC 2008), Malaga, Spain. pp. 93-96., (10.1109/INMMIC.2008.4745724)
- Wright, P. T., Sheikh, A., Roff, C., Tasker, P. J. and Benedikt, J. 2008. Highly efficient operation modes in GaN power transistors delivering upwards of 81% efficiency and 12W output power. Presented at: IEEE MTT-S International Microwave Symposium, Atlanta, GA, USA, 15-20 June 2008Proceedings of the IEEE MTT-S International Microwave Symposium Digest, Atlanta, USA, 15-20 June 2008. Piscataway, NJ: Institute of Electrical and Electronics Engineers pp. 1147-1150., (10.1109/MWSYM.2008.4633260)
- Jiangtao, S., Benedikt, J. and Tasker, P. 2008. A new method for the design of multi-sine excitations for the assessment of non-linear devices. Presented at: Microwave Symposium Digest, 2008 IEEE MTT-S International, Atlanta, GA. pp. 265-268., (10.1109/MWSYM.2008.463315)
- Lees, J., Williams, T., Woodington, S., McGovern, P., Cripps, S. C., Benedikt, J. and Tasker, P. 2008. Demystifying Device related Memory Effects using Waveform Engineering and Envelope Domain Analysis. Presented at: 38th European Microwave Conference 2008 (EuMC 2008), Amsterdam, The Netherlands. pp. 753-756., (10.1109/EUMC.2008.471562)
- Roff, C. et al. 2008. Pulsed-IV and RF waveform measurements of unique high-K dielectric GaN MOSFETs. Presented at: IEEE International Conference on Microwaves, Communications, Antennas and Electronic Systems (COMCAS), Tel Aviv, Israel. , (10.1109/COMCAS.2008.4562790)
- Sheikh, A., Roff, C., Benedikt, J., Tasker, P. J., Noori, B., Aaen, P. and Wood, J. P. 2008. Systematic waveform engineering enabling high efficiency modes of operation in Si LDMOS at both L-band and S-band frequencies. Presented at: IEEE MTT-S International Microwave Symposium Digest, Atlanta, USA. pp. 1143-1146., (10.1109/MWSYM.2008.4633259)
- Su, J., Benedikt, J. and Tasker, P. J. 2008. A new method for the design of multi-sine excitations for the assessment of non-linear devices. Presented at: IEEE MTT-S International Microwave Symposium Digest, Atlanta, USA. pp. 265-268., (10.1109/MWSYM.2008.4633154)
- Williams, T., Mojon, O., Woodington, S. P., Lees, J., Barciela, M. F., Benedikt, J. and Tasker, P. J. 2008. A robust approach for comparison and validation of large signal measurement systems. Presented at: IEEE MTT-S International Microwave Symposium Digest, Atlanta, USA. pp. 257-260., (10.1109/MWSYM.2008.4633152)
- Woodington, S. P. et al. 2008. A novel measurement based method enabling rapid extraction of a RF waveform look-up table based behavioural model. Presented at: IEEE MTT-S International Microwave Symposium Digest, Atlanta, USA. pp. 1453-1456., (10.1109/MWSYM.2008.463305)
- Wright, P. T., Lees, J., Tasker, P. J. and Benedikt, J. 2008. GaN power transistors in narrow and wide bandwidth applications. Presented at: IET Seminar on Wideband Receivers and Components, London, UK. pp. 1.
- Benedikt, J., Qi, H. and Tasker, P. . J. 2007. Novel Nonlinear Model for Rapid Waveform-based Extraction Enabling Accurate High Power PA Design. Presented at: IEEE MTT-S International Microwave Symposium Digest 2007. , (10.1109/MWSYM.2007.380246)
- Roff, C., Benedikt, J. and Tasker, P. J. 2007. Design Approach for Realization of Very High Efficiency Power Amplifiers. Presented at: IEEE MTT-S International Microwave Symposium Digest 2007. , (10.1109/MWSYM.2007.380310)
- Roff, C. et al. 2007. Detailed analysis of DC-RF dispersion in AlGaN/GaN HFETs using waveform measurements. Presented at: 1st European Microwave Integrated Circuits Conference, Manchester, UK, 10-13 Sept 20062006 European Microwave Integrated Circuits Conference. IEEE pp. 43., (10.1109/EMICC.2006.282745)
- Alghanim, A., Lees, J., Wiliams, T., Benedikt, J. and Tasker, P. 2007. Investigation of electrical base-band memory effects in high power 20w LDMOS power amplifiers. Presented at: 37th European Microwave Conference, Munich, Germany. pp. 48-51., (10.1109/EUMC.2007.4405122)
- Hashmi, M. S., Hashim, S. J., Williams, T., Benedikt, J. and Tasker, P. 2007. A broadband control electronics for envelope load pull system. Presented at: International Symposium on Signals, Systems and Electronics (ISSSE07), Montreal, Canada. pp. 197-200., (10.1109/ISSSE.2007.4294447)
- Benedikt, J. and Tasker, P. 2007. Characterisation of high power RF transistors: Waveform measurement and engineering. Presented at: Proceedings Workshop on Advances in Active Device Characterisation and Modelling for RF and Microwave, IEEE MTT-S International Microwave Symposium.
- Roff, C. et al. 2007. Optimising GaN/AIGaN HFET designs for high efficiency. Presented at: 2nd European Microwave Integrated Circuits Conference (EuMIC 2007), Munich, Germany. pp. 165-168., (10.1109/EMICC.2007.4412674)
- Sheikh, A., Tasker, P. J., Lees, J. and Benedikt, J. 2007. The impact of system impedance on the characterisation of high power devices. Presented at: 37th European Microwave Conference (EuMC), Munich, Germany. pp. 949-952., (10.1109/EUMC.2007.4405315)
- Alghanim, A., Lees, J., Williams, T., Benedikt, J. and Tasker, P. J. 2007. Using active IF load-pull to investigate electrical base-band induced memory effects in high-power LDMOS transistors. Presented at: Asia-Pacific Microwave Conference (APMC 2007), Bangkok, Thailand. IEEE pp. 1-4., (10.1109/APMC.2007.4554737)
- Tasker, P. J. and Benedikt, J. 2007. Waveform measurement and characterisation: The multi-tone characterisation challenge. Presented at: Proceedings of Workshop on RF power transistor and amplifier characterisation techniques, IEEE 2007 Radio and Wireless Symposium, Long Beach, USA.
- Qi, H., Benedikt, J. and Tasker, P. J. 2006. A novel approach for effective import of nonlinear device characteristics into CAD for large signal power amplifier design. Presented at: IEEE MTT-S International Microwave Symposium Digest 2006. pp. 477-480., (10.1109/MWSYM.2006.249596)
- Aboush, Z., Benedikt, J., Priday, J. and Tasker, P. 2006. DC-50 GHz low loss thermally enhanced low cost LCP package process utilizing mico via technology. Presented at: 2006 IEEE Microwave Symposium, San Francisco, USA. pp. 961-964.
- Mayer, M., Arthaber, H., Magerl, G., Kother, D., Lees, J., Benedikt, J. and Tasker, P. 2006. Advanced load pull systems. Presented at: The Institution of Engineering and Technology Seminar on High Efficiency Power Amplifier Design for Next Generation Wireless Applications, Cambridge, UK. pp. 27-54.
- Lees, J., Sheikj, A., Benedikt, J. and Tasker, P. 2006. The Design of a Gallium Nitride Doherty Amplifier using Waveform Measurements and Active Harmonic Load-Pull. Presented at: 2006 International Workshop on Integrated Nonlinear Microwave and Millimeter-Wave Circuits, Aveiro, Portugal. pp. 26-29.
- Roff, R. et al. 2006. Detailed analysis of DC-RF dispersion in AIGaN/GaN NFETs using waveform measurements. Presented at: 1st European Microwave Integrated Circuits Conference (EuMIC), Manchester, UK. pp. 43-45.
- Tudor, W., Benedikt, J. and Tasker, P. J. 2006. Full functional 'real time' non-linear device characterization system incorporating active load control. Presented at: 36th European Microwave Conference. pp. 1610-1613.
- Uren, M. J. et al. 2006. Control of short-channel effects in GaN/AIGaN HFETs. Presented at: 1st European Microwave Integrated Circuits Conference, Manchester, UK. pp. 65-68.
- Uren, M. et al. 2006. Control of Short-Channel Effects in GaN/AlGaN HFETs. Presented at: 1st European Microwave Integrated Circuits Conference, Manchester, UK, 10-13 Sept 20062006 European Microwave Integrated Circuits Conference. IEEE pp. 65-65., (10.1109/EMICC.2006.282751)
- Aboush, Z., Lees, J., Benedikt, J. and Tasker, P. J. 2005. Active harmonic load-pull system for characterising highly mismatched high power transistors. Presented at: IEEE MTT-S International Microwave Symposium Digest 2005, 2005. , (10.1109/MWSYM.2005.1516920)
- Williams, T., Tasker, P. J. and Benedikt, J. 2005. Experimental evaluation of an active envelope load pull architecture for high speed device characterization. Presented at: IEEE MTT-S International Microwave Symposium Digest 2005. IEEE, (10.1109/MWSYM.2005.1516980)
- Aboush, Z., Benedikt, J., Priday, J. and Tasker, P. 2005. Novel cost-efficient packaging technology for high-power LDMOS devices. Presented at: 10th IEEE High Frequency Postgraduate Student Colloquium, Leeds, UK. pp. 15-18.
- Aboush, Z. et al. 2005. High power active harmonic load-pull system for characterisation of high power 100-Watt transistors. Presented at: 35th European Microwave Conference, Paris, France, Vol. 1. pp. 609-612., (10.1109/EUMC.2005.1608930)
- Alghanim, A., Benedikt, J. and Tasker, P. 2005. A measurement test-set for characterisation of high power LDMOS transistors including memory effects. Presented at: 10th IEEE High Frequency Postgraduate Student Colloquium, Leeds, UK. pp. 29-32.
- McGovern, P. et al. 2005. Analysis of DC-RF dispersion in AlGaN/GaN HFETs using pulsed I-V and time-domain waveform measurements. Presented at: Microwave Symposium Digest, IEEE MTT-S International, Atlanta, USA. pp. 503-506.
- Qi, H., Benedikt, J. and Tasker, P. 2005. Direct extraction of large-signal table-based behavioural models from time-domain voltage and current waveforms. Presented at: 10th IEEE High Fequency Postgraduate Student Colloquium, Leeds, UK. pp. 25-28.
- Kharji, O. A., Williams, T., Benedikt, J. and Tasker, P. 2005. A broadband envelope load pull system. Presented at: 10th IEEE High Frequency Postgraduate Student Colloquium, Leeds, UK. pp. 21-24.
- Lees, J. et al. 2005. A comparison of load-pull measurement results of a 4W Phemt involving five European laboratories. Presented at: European Gallium Arsenide and Other Semiconductor Application Symposium, Paris, France, 3-4 October, 2005Proceedings of the European Gallium Arsenide and Other Semiconductor Application Symposium Paris, France,3-4 October, 2005. IEEE pp. 321-324.
- Lees, J. et al. 2005. Characterisation of an experimental gallium nitride microwave Doherty amplifier. Presented at: 35th European Microwave Conference, Paris, France, 4-6 October 200535th European Microwave Conference: conference proceedings. Horizon House
- Williams, T., Benedikt, J. and Tasker, P. J. 2005. Application of a novel active envelope load pull architecture in large signal device characterisation. Presented at: 35th European Microwave Conference, Paris, France.
- McGovern, P. et al. 2004. Single-tone and two-tone time-domain large signal characterization of GaN HFETs operated in class A. Presented at: IEEE MTT-S International Microwave Symposium Digest 2004, Vol 2, 2004. pp. 825-828., (10.1109/MWSYM.2004.1339092)
- Aboush, Z., Benedikt, J. and Tasker, P. 2004. High power harmonic active load-pull using broadband matching networks. Presented at: 9th IEEE High Frequency Postgraduate Student Colloquium, Manchester, UK. pp. 145-150.
- Lees, J., Haczewski, J., Benedikt, J. and Tasker, P. 2004. An automated multi-stimulus measurement system for characterising multi-device amplifiers. Presented at: 34th European Microwave Conference, Amsterdam, The Netherlands, Vol. Nov-15. pp. 435-438.
- Williams, T., Benedikt, J. and Tasker, P. J. 2004. Novel base-band envelope load pull architecture. Presented at: 9th IEEE High Frequency Postgraduate Student Colloquium, Manchester, UK. pp. 157-161.
- Lees, J., Goss, M., Benedikt, J. and Tasker, P. 2003. Single-tone optimisation of an adaptive-bias Doherty structure. Presented at: Microwave Symposium Digest, IEEE MTT-S International, Philadelphia, USA, 8-13 June 2003Microwave Symposium Digest, IEEE MTT-S International, Vol. 3. IEEE pp. 2213-2216., (10.1109/MWSYM.2003.1210604)
- Benedikt, J. and Tasker, P. 2002. High power time-domain measurement bench for power amplifier development. Presented at: Asia-Pacific Microwave Conference, Institute of Electronics, Information and Communication Engineers (IEICE), Kyoto, Japan. pp. 303-306.
- Tasker, P. J. and Benedikt, J. 2002. High-power time-domain measurement bench for power amplifier development. Presented at: 59th ARFTG Conference Digest, Seattle, USA. pp. 107-110.
- Gaddi, R., Pla, J. A., Benedikt, J. and Tasker, P. J. 2001. LDMOS electro-thermal model validation from large-signal time-domain measurement. Presented at: IEEE MTT-S International Microwave Symposium Digest 2001, Phoenix, AZ, USA, 20-25 May 2001Microwave Symposium Digest, IEEE MTT-S International (Phoenix, USA), Vol. 1. pp. 399-402.
- Benedikt, J., Gaddi, R., Tasker, P. J., Goss, M. and Zadeh, M. 2000. High power time domain measurement system with active harmonic load-pull for high efficiency base station amplifier design. Presented at: 2000 IEEE MTT-S International Microwave Symposium, Boston, MA, USA, 11-16 June 2000 Presented at Perkins, T. ed.2000 IEEE MTT-S International Microwave Symposium Digest, Vol. 3. Los Alamitos, CA: IEEE pp. 1459-1462., (10.1109/MWSYM.2000.862249)
Research
His research on active load-pull systems at the Centre for High Frequency Engineering enjoys strong participation from industry. Resulting in numerous research and development projects with internationally leading companies in Asia, North America and Europe.
Here, his research interests are focused on large-signal measurement systems at RF and high frequencies, large-signal device characterisation including novel active harmonic source- & load-pull systems, and the development of efficient and linear high power amplifiers for the mobile telecommunication sector. Since 2000 he has been involved in the development of a number of time-domain characterisation and active harmonic load pull systems.
A more recent research focuses on the interaction between human cells an RF irradiation that is similar to the RF signals generated by smartphones. The work is carried out in collaboration with the School of Medicin at Cardiff University. In the last few years a particular focus has been the investigation on suppressing growth of cancerous tissue through RF irradiation. The promising results have lead to a new patent application for a new method to treat cancer tumours. On-going research projects aim at identifying the exact mechanism that lead to cancer cell death at low RF radiation levels.
Contracts
| Title | People | Sponsor | Value | Duration |
|---|---|---|---|---|
| KTC Green Communication (Convergence) | McCann DJ, Benedikt J, Tasker PJ | National Assembly for Wales (A4B) | 135550 | 01/08/2009 - 31/07/2012 |
| Advance uptake of the ''Cardiff Model'' | Tasker P, Bendikt J | EPSRC | 44276 | 01/07/2013 - 30/06/2014 |
| Research into GeN solid state RF power sources for seekers. | Tasker P, Benedikt J | United Monolithic Semiconductors | 87260 | 24/03/2011 - 23/03/2012 |
| Characterization of nonlinearities of the high power devices under multi tone signal excitation | Dr J Benedikt | Nokia Corporation | 13200 | 01/10/2004 - 01/10/2007 |
| Growth and fabrication of gallium nitride | Dr J Benedikt | QinetiQ Ltd | 19300 | 01/10/2005 - 30/09/2008 |
| Noise and s-parameter measurement of hittite HMC442 and HMC449 devices | Dr J Benedikt, Mr J Lees, Prof PJ Tasker | EADS Astrium Limited | 16028 | 17/07/2006 - 17/12/2006 |
| Noise and s-parameter measurement of hittite HMC442 and HMC449 devices | Dr J Benedikt, Mr J Lees, Prof PJ Tasker | EADS Astrium Limited | 3512 | 17/07/2006 - 17/12/2006 |
| Novel development methodology for highly-efficient and ultra-broadband remote sensing applications | Dr J Benedikt, Prof PJ Tasker | Selex Sensors and Airborne Systems Ltd | 277573 | 01/04/2007 - 30/09/2010 |
| MMIC Interconnect and packaging | Dr J Benedikt, Prof PJ Tasker | Labtech Ltd | 21000 | 01/10/2004 - 01/10/2007 |
| Diagnostic Rhyme Testing | Dr J Benedikt, Prof PJ Tasker | EADS Defence and Security Systems Ltd | 40704 | 12/12/2005 - 11/02/2006 |
| Capital equipment addressing new markets and leveraging in extra funding to Wales | Dr J Benedikt, Prof PJ Tasker, Dr A Porch | National Assembly for Wales (KEF) | 247700 | 15/11/2006 - 01/04/2007 |
| Speech intelligibility testing | Dr J Benedikt, Prof PJ Tasker, Mr J Lees | EADS Astrium Limited | 87950 | 01/11/2006 - 28/02/2007 |
| KTC Green Communication (Non-Convergence) | McCann DJ, Tasker PJ, Benedikt J | National Assembly for Wales (A4B) | 235368 | 01/08/2009 - 01/08/2012 |
| Power transistor and amplifier characterization and modelling using modulated waveforms in non 50 ohm environments | Benedikt J, Tasker PJ | Agilent Technologies | 14588 | 09/06/2008 - 08/06/2009 |
| Wideband high eficiency power amplifier design | Benedikt J | REMEC Defense & Space | 6061 | 01/04/2011 - 31/08/2011 |
| Development of a Doherty PA | Benedikt J | ERA Technology Ltd | 34000 | 01/10/2007 - 31/03/2011 |
| Technology platform evangelization and implementation of graphical system design in the context of improving science and engineering practical education and accelerating advanced research | Benedikt J | National Instruments | 45000 | 01/04/2014 - 31/03/2017 |
| Faculty position | Benedikt J | National Instruments | 30000 | 01/08/2016 - 31/07/2018 |
| Non-linear modelling and characterization demonstrator | Benedikt J, | National Instruments Corporation UK Ltd | 40000 | 01/03/2012 - 28/02/2013 |
| High-efficiency device characterisation for OperaNET | Benedikt J, Lees J | Freescale Semiconductor | 50000 | 01/10/2008 - 30/09/2011 |
| Investigation and design of HTB power amplifiers for WuMax Applications | Benedikt J, Tasker PJ | Mimex Europe Ltd | 9712 | 25/09/2006 - 24/02/2010 |
| Noise and s-parameter measurement of hittite HMC442 and HMC449 devices | Benedikt J, Tasker PJ, Lees J | EADS Astrium Limited | 3512 | 17/07/2006 - 17/12/2006 |
| Waveform Engineering in Manufacturing | Benedikt J, Tasker P | EPSRC | 60167 | 01/01/2014 - 31/12/2014 |
| Rapid identification of Broadband and efficient PA modes | Benedikt J, Tasker P | FutureWei Technologies Inc | 30863 | 01/01/2015 - 31/12/2015 |
| Development of linear HBT power amplifiers | Benedikt J, Tasker PJ | Mimex Europe Ltd | 21000 | 25/09/2006 - 24/02/2010 |
| Novel development methodology for highly-efficient and ultra-broadband remote sensing applications (with extension) | Benedikt J, Tasker PJ | Selex Sensors and Airborne Systems Ltd | 277573 | 01/04/2007 - 30/09/2010 |
| Broadband doherty PA key techniques | Benedikt J, Tasker PJ | Huawei | 138000 | 18/09/2014 - 30/09/2016 |
| Characterization of nonlinearities of the high power devices under multi signal exitation | Benedikt J, Tasker PJ | Nokia Corporation | 46800 | 01/10/2004 - 30/09/2007 |
| III-V Epitaxial Layer Optimization for High Frequency Electronic Devices Based on RF Characterization | Hirshy H, Tasker P, Perks R, Benedikt J | Ser Cymru NRN AEM Swansea | 190000 | 01/09/2015 - 31/08/2018 |
| Integration of RF Circuits with High Speed GaN Switching on Silicon Substrates | Tasker P, Lees J, Benedikt J | EPSRC | 835074 | 01/04/2016 - 31/03/2019 |
| Exploit the unique complementary activities of RF characterization and GaN fabrication to demonstrate higher performance (power/efficiacy/robustness) RF power and low noise GaN microwave devices | Tasker PJ, Benedikt J | Qinetiq Ltd | 21263 | 01/10/2008 - 31/03/2012 |
| Holistic design of power amplifiers for future wireless systems | Tasker PJ, Benedikt J | EPSRC | 1157919 | 01/04/2008 - 30/09/2013 |
| Top amplifier research groups in a European team (TARGET) | Tasker PJ, Benedikt J | Commission of European Communities | 316800 | 01/01/2004 - 30/06/2005 |
| RF measurement on GaN transistors and passives | Tasker PJ, Benedikt J | QinetiQ Ltd | 41031 | 13/09/2004 - 13/06/2006 |
| Characterisation and comparison of packaged GaN devises | Tasker PJ, Benedikt J, Lees J, | Cree Inc | 16931 | 01/05/2008 - 01/09/2008 |
Supervised Students
| Title | Student | Status | Degree |
|---|---|---|---|
| High Power Waveform Engineering | SHEIKH Aamir | Graduate | PhD |
| A novel Approach For Wide Band High-Efficiency Power Amplifier Design | ALMUHAISEN Abdullah | Graduate | PhD |
| Microwave Amplifier Design | ALGHANIM Abdulrahman | Graduate | PhD |
| RAMAN BASED THERMOGRAPHY OF GAN HFETS UNDER HIGH POWER RF EXCITATION. SPECIALISATION - COMMUNICATION ENGINEERING. | AL ZIAYREE Ali Mahdi Lafta | Current | PhD |
| MODULATION SCHEMES FOR FUTURE MOBILE COMMUNICATION SYSTEMS INTEGRATING THE NONLINEAR BEHAVIOUR OF RF FRONT END | AL RAWACHY Azam Asamm Daood | Current | PhD |
| Radio Frequency Power Amplifier Linearization Technique | NOORI Basim | Current | PhD |
| Application of Waveform Engineering to GaN Characterisation and Class F Design | ROFF Christopher Joseph | Graduate | PhD |
| Novel MMIC Design Process Using Waveform Engineering | FITZPATRICK Dominic | Graduate | PhD |
| NOVEL POWER AMPLIFIER DESIGN USING NON-LINEAR MICROWAVER CHARACTERISATION AND MEASUREMENT TECHNIQUES | OGBOI Friday Lawrence | Graduate | PhD |
| Comms and IT | QI Hao | Graduate | PhD |
| Input Harmonic And Mixing Behavioural Model Analysis | BELL James | Graduate | PhD |
| Multi-Sines Stimulus Design For The Assessment Of Non-Linear Devices | SU Jiangtao | Graduate | PhD |
| The investigation, Development and Implementation of RF-PA Structures Possessing High Efficiency over Wide Dynamic Range | LEES Jonathan | Graduate | PhD |
| Wideband Active Envelope Load-Pull for Robust Power Amplifier and Transistor Characterisation. | HASHIM khali | Graduate | PhD |
| COMMUNICATIONS SYSTEMS | CASBON Michael | Current | PhD |
| Analysis, Realization And Evaluation Of Envelope Load Pull System For Both CW And Multi-Tone Applications | HASHMI Mohammad Shabi | Graduate | PhD |
| An Enhanced Modulated Waveform Measurement System | AKMAL Muhammad | Graduate | PhD |
| Development Of A High Power RF Measurement System | RUSSAMEE Nilaped | Graduate | PhD |
| Development of Novel Design Methodologies for the Efficiency Enhancement of RF Power Amplifiers in Wireless Communications | WRIGHT Peter | Graduate | PhD |
| Intelligence Driven Load-Pull Measurement Strategies | SAINI Randeep | Graduate | PhD |
| Broadband Microwave Push-Pull Power Amplifiers | SMITH Robert | Graduate | PhD |
| Behavioral Model Analysis Of Active Harminic Load-Pull Measurements | WOODINGTON Simon | Graduate | PhD |
| RAPID IDENTIFICATION OF BROADBAND AND EFFICIENT PA MODES. | SYED ANERA Syed Muhammad Hilmi Bin | Current | PhD |
| INVESTIGATIONS ON A MULTI-HARMONIC DPD SYSTEM FOR RF TRANSMITTERS IN MOBILE COMMUNICAITON SYSTEMS. SPECIALIZATION: ELECTRICAL ENGINEERING ( ELECTRONIC AND TELECOMMUNICATION). | HUSSEINI Thoalfukar H Abdalrida | Current | PhD |
| Continuous Mode High Efficiency Power Amplifier Design For X Band | CANNING Timothy | Graduate | PhD |
| A Large-Signal Multi-Tone Time Domain Waveform Measurement System With Broadband Active Load Impedance Control | WILLIAMS Tudor Vyvyan | Graduate | PhD |
| Novel Highly Efficient Broadband Continuous Power Amplifier Modes | CARRUBBA Vincenzo | Graduate | PhD |
| RF IV Waveform Engineering Applied to VSWR Sweeps and RF Stress Testing | MCGENN William | Graduate | PhD |
| Thin film packaging | ABOUSH Zaid Emmanuel | Graduate | PhD |
| The Auxiliary Envelope Tracking RF Power Amplifiers | YUSOFF Zubaida | Graduate | PhD |
Teaching
His teaching tasks comprise mainly third and fourth year modules on Communication Systems and their development to reflect the rapid changes in this area.
Biography
Professional memberships
- Funded industrial collaborations with QinetiQ, Milmega, Cobham and Nokia Corporation
- Co-founder of Mesuro Ltd