![Roberto Quaglia](https://profiles-cardiff.imgix.net/attachments/3922?w=200&h=200&auto=format&crop=faces&fit=crop&q=90")
Dr Roberto Quaglia
- Available for postgraduate supervision
Teams and roles for Roberto Quaglia
Senior Lecturer - CHFE Research Group Leader
Overview
I am a Senior Lecturer in the School of Engineering. My research focusses on high frequency power amplifiers
I am the Research Group Leader of the Centre for High Frequency Engineering:
https://www.cardiff.ac.uk/research/explore/research-units/centre-for-high-frequency-engineering
I have published around 130 peer-reviewed scientific papers, of which more than 45 on international journals. I am co-author of the books "Electronics for Microwave Backhaul" and "Telecommunication Electronics" published by Artech House.
I am Year Tutor for the MSc courses related to Microwave and Wireless technologies and Compound Semiconductor Electronics.
I teach master-level modules on advanced microwave techniques, and undergraduate modules on Analogue and Digital Electronics.
Publication
2025
- Al-Rawachy, A. et al. 2025. Automated Cardiff model complexity identification and parameters extraction from measured tailored A-pull data. IEEE Journal of Microwaves 5 (5), pp.1150-1161. (10.1109/JMW.2025.3600995)
- Baddeley, A. , Quaglia, R. and Tasker, P. J. 2025. Calibration error reduction in millimeter-wave load-pull systems measuring highly-reflective loads. IEEE Transactions on Microwave Theory and Techniques 73 (6), pp.3552-3564. (10.1109/TMTT.2024.3495544)
- Collier, A. et al. 2025. Large-signal performance comparison of ion implant and mesa etch isolated AlGaN/GaN HEMT switches on silicon. Presented at: European Microwave Integrated Circuits Conference Utrecht, The Netherlands 23 September 2025. Proceedings of the 20th European Microwave Integrated Circuits Conference. IEEE. , pp.230-233. (10.23919/EuMIC65284.2025.11234588)
- Ghozati, S. U. et al. 2025. Cardiff behavioral model of a Ka-Band SPDT switch trained on structured minimization of load-pull characterization data. Presented at: 2025 International Workshop on Integrated Nonlinear Microwave and Millimetre-Wave Circuits Torino, Italy 10-11 April 2025. Proceedings of the International Workshop on Integrated Nonlinear Microwave and Millimetre-Wave Circuits. IEEE. , pp.1-4. (10.1109/INMMIC64198.2025.10975719)
- Ghozati, S. U. and Quaglia, R. 2025. Ka-band single-pole double-throw switch in GaN MMIC technology. International Journal of Microwave and Wireless Technologies (10.1017/S1759078725000108)
- Piacibello, A. et al., 2025. Design and extensive NPR characterization of a highly-linear SatCom GaN MMIC Doherty PA. IEEE Transactions on Microwave Theory and Techniques 73 (1), pp.156-166. (10.1109/TMTT.2024.3474092)
- Powell, A. et al. 2025. Efficient output power configuration in a K-band power amplifier using a split-gate layout. International Journal of Microwave and Wireless Technologies (10.1017/S1759078725101682)
- Tian, M. et al. 2025. Artificial neural network nonlinear transistor behavioral models: Structure and parameter determination process based on the Cardiff Model. IEEE Transactions on Microwave Theory and Techniques 73 (2), pp.745-759. (10.1109/TMTT.2024.3434959)
- Urvoy, J. et al. 2025. Orthogonal load-modulated balanced amplifier for back-off efficiency enhancement and agile frequency configuration. IEEE Transactions on Microwave Theory and Techniques (10.1109/TMTT.2025.3604180)
- Urvoy, J. , Quaglia, R. and Cripps, S. C. 2025. Design and simulation of a Doherty-mode OLMBA for enhanced back-off efficiency over an octave bandwidth. Presented at: 2025 International Workshop on Integrated Nonlinear Microwave and Millimetre-Wave Circuits Torino, Italy 10-11 April 2025. Proceedings of the International Workshop on Integrated Nonlinear Microwave and Millimetre-Wave Circuits. IEEE. , pp.1-4. (10.1109/INMMIC64198.2025.10975674)
- Van Den Heuvel, I. et al. 2025. Improved iterative envelope simulation for the efficient prediction of the impact of wideband modulated signals on power amplifier performance. Presented at: 2025 International Workshop on Integrated Nonlinear Microwave and Millimetre-Wave Circuits Torino, Italy 10-11 April 2025. Proceedings of the International Workshop on Integrated Nonlinear Microwave and Millimetre-Wave Circuits. IEEE. , pp.1-4. (10.1109/INMMIC64198.2025.10975660)
2024
- Azad, E. M. et al. 2024. Design and experimental characterization of an asymmetric GaN MMIC Doherty power amplifier for Ka-Band transmitters. Presented at: 19th European Microwave Integrated Circuits Conference (EuMIC) Paris, France 23-24 September 2024. 2024 19th European Microwave Integrated Circuits Conference (EuMIC). IEEE. , pp.158-161. (10.23919/eumic61603.2024.10732357)
- Bogusz, A. et al. 2024. Design and characterization of an MMIC current mode outphasing power amplifier. Presented at: IEEE/MTT-S International Microwave Symposium Washington, DC, USA 16-21 June 2024. Proceedings of IEEE/MTT-S International Microwave Symposium. IEEE. , pp.580-583. (10.1109/IMS40175.2024.10600335)
- Ghozati, S. U. , Baddeley, A. and Quaglia, R. 2024. Large-signal characterization and behavioral modeling of mm-wave GaN HEMT switches tailored for advanced power amplifier architectures. Presented at: 2024 IEEE Topical Conference on RF/Microwave Power Amplifiers for Radio and Wireless Applications (PAWR) 21-24 January 2024. Proceedings Topical Conference on RF/Microwave Power Amplifiers for Radio and Wireless Applications (PAWR). IEEE. , pp.21-23. (10.1109/PAWR59907.2024.10438592)
- Piacibello, A. et al., 2024. High-gain and high-linearity MMIC GaN Doherty Power Amplifier with 3-GHz bandwidth for Ka-band satellite communications. IEEE Microwave and Wireless Technology Letters 34 (6), pp.765-768. (10.1109/LMWT.2024.3384306)
- Powell, A. G. et al. 2024. Efficient output power configuration in a K-Band power amplifier using a split-gate layout. Presented at: 19th European Microwave Integrated Circuits Conference (EuMIC) Paris, France 23-24 September 2024. 2024 19th European Microwave Integrated Circuits Conference (EuMIC). IEEE. , pp.275-278. (10.23919/eumic61603.2024.10732591)
- Quaglia, R. , Cripps, S. and Powell, J. 2024. Impact of matching networks on the impedance settling time in high frequency power amplifiers. Presented at: 2024 IEEE Topical Conference on RF/Microwave Power Amplifiers for Radio and Wireless Applications (PAWR) 21-24 January 2024. Proceedings Topical Conference on RF/Microwave Power Amplifiers for Radio and Wireless Applications (PAWR) 2024. IEEE. , pp.28-30. (10.1109/PAWR59907.2024.10438584)
- Rubio, J. J. M. , Azad, E. M. and Quaglia, R. 2024. A differential combiner for quasi-complete cancellation of output capacitance in mm-wave power amplifiers with high- Q devices. IEEE Transactions on Microwave Theory and Techniques 72 (9), pp.5309-5318. (10.1109/TMTT.2024.3365932)
- Tian, M. et al. 2024. An extraction method based on artificial neural network techniques for novel Cardiff model with reasonable extrapolation behavior. IEEE Microwave and Wireless Components Letters 34 (1), pp.5-8. (10.1109/LMWT.2023.3329979)
- Tian, M. et al. 2024. Application of the Cardiff Model for Orthogonal LMBA response prediction. Presented at: 2024 IEEE Topical Conference on RF/Microwave Power Amplifiers for Radio and Wireless Applications (PAWR) 21-24 January 2024. Proceedings Topical Conference on RF/Microwave Power Amplifiers for Radio and Wireless Applications (PAWR) 2024. IEEE. , pp.17-20. (10.1109/PAWR59907.2024.10438664)
- van den Heuvel, I. et al. 2024. A baseband impedance cancellation technique for wideband multi-transistor amplifiers. IEEE Microwave and Wireless Technology Letters 34 (6), pp.777-780. (10.1109/LMWT.2024.3390594)
2023
- Baddeley, A. et al. 2023. Millimeter-wave on-wafer large signal characterization system for harmonic source/load pull and waveform measurements. Presented at: 2023 IEEE/MTT-S International Microwave Symposium - IMS 2023 San Diego, USA 11-16 June 2023. Proceedings of the 2023 IEEE/MTT-S International Microwave Symposium (IMS). IEEE. , pp.1101-1104. (10.1109/IMS37964.2023.10187929)
- Ghozati, S. U. et al. 2023. Load pull-driven behavioral modelling of microwave switches for the design of tunable reflective terminations. Presented at: EuMW 2024: European Microwave Week 2023 19 - 21 September 2023.
- Li, W. et al., 2023. Performance modeling and shaping function extraction for dual-input load modulated power amplifiers. Presented at: 2023 IEEE/MTT-S International Microwave Symposium - IMS 2023 San Diego, USA 11-16 June 2023. Proceedings of the 2023 IEEE/MTT-S International Microwave Symposium (IMS). IEEE. , pp.203-206. (10.1109/IMS37964.2023.10188039)
- Tian, M. et al. 2023. A novel Cardiff model coefficients extraction process based on artificial neural network. Presented at: 2023 IEEE Topical Conference on RF/Microwave Power Amplifiers for Radio and Wireless ApplicationsED, MAY BE LINKED Las Vegas, NV, USA 22-25 January 2023. 2023 IEEE Topical Conference on RF/Microwave Power Amplifiers for Radio and Wireless Applications. IEEE. (10.1109/PAWR56957.2023.10046221)
- Urvoy, J. et al. 2023. Experimental characterization of a dual-input OLMBA for back-off efficiency improvement. Presented at: 53rd European Microwave Conference (EuMC) Berlin, Germany 19-21 September 2023. Proceedings of 53rd European Microwave Conference. IEEE. , pp.267-270. (10.23919/EuMC58039.2023.10290592)
- Van Den Heuvel, I. et al. 2023. An envelope model for efficient prediction of the impact of wideband signals on power amplifier performance. Presented at: 2023 International Workshop on Integrated Nonlinear Microwave and Millimetre-Wave Circuits (INMMIC) 08-11 November 2023. 2023 International Workshop on Integrated Nonlinear Microwave and Millimetre-Wave Circuits (INMMIC). IEEE. (10.1109/INMMIC57329.2023.10321784)
- Yuan, T. et al. 2023. Output signal re-injection in load modulated balanced amplifiers for RF bandwidth improvement. IEEE Microwave and Wireless Components Letters 33 (10), pp.1458-1461. (10.1109/LMWT.2023.3305812)
2022
- Azad, E. M. et al. 2022. New formulation of Cardiff behavioral model including DC bias voltage dependence. IEEE Microwave and Wireless Components Letters 32 (6), pp.607-610. (10.1109/LMWC.2022.3140653)
- Azad, E. M. et al. 2022. DC-dependent Cardiff model from modulated supply and load-pull data. Presented at: 2022 Asia-Pacific Microwave Conference (APMC) Yokohama, Japan 29 November 2022 - 02 December 2022. Proceedings of 2022 Asia-Pacific Microwave Conference (APMC). IEEE. , pp.181-183. (10.23919/APMC55665.2022.9999796)
- Azad, E. M. et al. 2022. Load-pull data analysis of a GaN on SiC HEMT targeting multi bias Doherty design. Presented at: International Workshop on Integrated Nonlinear Microwave and Millimeterwave Circuits, INMMIC Cardiff, UK 7-8 April 2022. Proceedings of the 2022 International Workshop on Integrated Nonlinear Microwave and Millimetre-Wave Circuits. IEEE. (10.1109/INMMiC54248.2022.9762106)
- Azad, E. M. et al. 2022. Cardiff model utilization for predicting the response of multiple-input power amplifiers. Presented at: Mediterrannean Microwave Symposium (MMS) Pizzo Calabro, Italy 9-13 May 2022. Proceedings of Microwave Mediterranean Symposium (MMS). IEEE. (10.1109/MMS55062.2022.9825516)
- Baddeley, A. et al. 2022. Gate bias voltage dependence of Cardiff admittance model in Ka-band GaAs pHEMTs. Presented at: IEEE Topical Conference on RF/Microwave Power Amplifiers for Radio and Wireless Applications (PAWR) Las Vegas, NV, USA 16-19 January 2022. 2022 IEEE Topical Conference on RF/Microwave Power Amplifiers for Radio and Wireless Applications (PAWR). IEEE. , pp.8-10. (10.1109/PAWR53092.2022.9719858)
- Costanzo, F. et al., 2022. A GaN MMIC stacked doherty power amplifier for space applications. Presented at: IEEE Topical Conference on RF/Microwave Power Amplifiers for Radio and Wireless Applications (PAWR) Las Vegas, NV, USA 16-19 January 2022. Proceedings of Topical Conference on RF/Microwave Power Amplifiers for Radio and Wireless Applications (PAWR). IEEE. , pp.29-31. (10.1109/PAWR53092.2022.9719789)
- Davies-Smith, C. et al. 2022. An enhanced active load-pull algorithm for faster convergence. Presented at: European Microwave Week 2021 London, UK 2-7 April 2022. European Microwave Week 2021 "United in Microwaves" Conference Proceedings. IEEE. , pp.354. (10.23919/EuMC50147.2022.9784250)
- Guillena, E. et al., 2022. Reconfigurable DPD based on ANNs for wideband load modulated balanced amplifiers under dynamic operation from 1.8 to 2.4 GHz. IEEE Transactions on Microwave Theory and Techniques 70 (1), pp.453-465.
- Piacibello, A. et al., 2022. A 5-w gan doherty amplifier for ka-band satellite downlink with 4-ghz bandwidth and 17-db npr. IEEE Microwave and Wireless Components Letters 32 (8), pp.964-967. (10.1109/LMWC.2022.3160227)
- Piacibello, A. et al., 2022. AM/PM characterization of wideband power amplifiers. Presented at: IEEE Topical Conference on RF/Microwave Power Amplifiers for Radio and Wireless Applications (PAWR) Las Vegas, NV, USA 16-19 January 2022. Proceedings of IEEE Topical Conference on RF/Microwave Power Amplifiers for Radio and Wireless Applications. IEEE. (10.1109/PAWR53092.2022.9719787)
- Quaglia, R. and Camarchia, V. 2022. PAWR 2023 [RWW 2023]. IEEE Microwave Magazine 23 (12), pp.30-30. (10.1109/MMM.2022.3203924)
- Quaglia, R. et al. 2022. Load-modulated balanced amplifier: from first invention to recent development. IEEE Microwave Magazine 23 (12), pp.60-70. (10.1109/MMM.2022.3203940)
- Quaglia, R. et al. 2022. Effect of HEMT output characteristics on the load mismatch resilience in balanced power amplifiers. Presented at: 2022 International Workshop on Integrated Nonlinear Microwave and Millimetre-Wave Circuits (INMMiC) Cardiff, Wales 07-08 April 2022. 2022 International Workshop on Integrated Nonlinear Microwave and Millimetre-Wave Circuits (INMMiC). IEEE. , pp.1-3. (10.1109/INMMiC54248.2022.9762184)
- Quaglia, R. et al. 2022. Mitigation of load mismatch effects using an orthogonal load modulated balanced amplifier. IEEE Transactions on Microwave Theory and Techniques 70 (6), pp.3329-3341. (10.1109/TMTT.2022.3167414)
- Quaglia, R. et al. 2022. K-band GaAs Doherty power amplifiers for microwave backhaul. Presented at: 2022 International Workshop on Integrated Nonlinear Microwave and Millimetre-Wave Circuits (INMMiC) Cardiff, Wales 07-08 April 2022. 2022 International Workshop on Integrated Nonlinear Microwave and Millimetre-Wave Circuits (INMMiC). IEEE. , pp.1-3. (10.1109/INMMiC54248.2022.9762217)
2021
- Piacibello, A. et al., 2021. Evaluation of a stacked-FET cell for high-frequency applications (invited paper). International Journal of Numerical Modelling: Electronic Networks, Devices and Fields 34 (5) e2881. (10.1002/jnm.2881)
- Piacibello, A. et al. 2021. A simple method to identify parametric oscillations in power amplifiers using harmonic balance solvers. IEEE Microwave and Wireless Components Letters 31 (3), pp.269-271. (10.1109/LMWC.2021.3049939)
- Quaglia, R. 2021. Improvement of small signal equivalent simulations for power and efficiency matching of GaN HEMTs. Electronics 10 (3) 263. (10.3390/electronics10030263)
- Ramella, C. et al., 2021. Watt-level 21-25 GHz integrated Doherty power amplifier in GaAs technology. IEEE Microwave and Wireless Components Letters 31 (5), pp.505-508. (10.1109/LMWC.2021.3069555)
- Rubio, J. J. M. et al., 2021. 3-20 GHz GaN MMIC Power Amplifier Design Through a COUT Compensation Strategy. IEEE Microwave and Wireless Components Letters 31 (5), pp.469-472. (10.1109/LMWC.2021.3066282)
- Wang, T. et al., 2021. Machine-learning assisted optimisation of free-parameters of a dual-input power amplifier for wideband applications. Sensors 21 (8) 2831. (10.3390/s21082831)
2020
- Azad, E. M. et al. 2020. Gate bias incorporation into Cardiff behavioural modelling formulation. Presented at: IEEE/MTT-S International Microwave Symposium (IMS 2020) Los Angeles, CA, USA 4-6 August 2020. 2020 IEEE/MTT-S International Microwave Symposium (IMS). IEEE. , pp.420-423. (10.1109/IMS30576.2020.9223817)
- Chaudry, K. , Quaglia, R. and Cripps, S. 2020. A load modulated balanced amplifier with linear gain response and wide high-efficiency output power back-off region. Presented at: 2020 International Workshop on Integrated Nonlinear Microwave and Millimetre-Wave Circuits (INMMiC) Cardiff, Wales 16-17 July 2020. 2020 International Workshop on Integrated Nonlinear Microwave and Millimetre-Wave Circuits (INMMiC). IEEE. , pp.1-3. (10.1109/INMMiC46721.2020.9160205)
- Chen, P. et al. 2020. Optimising linearity of envelope tracking power amplifier using baseband linearisation approach. Presented at: 2020 International Workshop on Integrated Nonlinear Microwave and Millimetre-Wave Circuits (INMMiC) Cardiff, Wales 16-17 July 2020. 2020 International Workshop on Integrated Nonlinear Microwave and Millimetre-Wave Circuits (INMMiC). IEEE. , pp.1-3. (10.1109/INMMiC46721.2020.9160347)
- Chen, P. et al. 2020. Efficiency enhancement of a broadband sequential power amplifier using envelope tracking. Presented at: 2020 International Workshop on Integrated Nonlinear Microwave and Millimetre-Wave Circuits (INMMiC) Cardiff, Wales 16-17 July 2020. 2020 International Workshop on Integrated Nonlinear Microwave and Millimetre-Wave Circuits (INMMiC). IEEE. , pp.1-3. (10.1109/INMMiC46721.2020.9160332)
- Chen, P. et al. 2020. Look-up table method for optimising coupling ratio in broadband sequential power amplifiers. IET Microwaves Antennas and Propagation 14 (13), pp.1626-1634. (10.1049/iet-map.2019.1102)
- Collins, D. J. et al. 2020. The orthogonal LMBA: a novel RFPA architecture with broadband reconfigurability. IEEE Microwave and Wireless Components Letters 30 (9), pp.888-891. (10.1109/LMWC.2020.3010817)
- Moreno Rubio, J. et al. 2020. Design of a broadband power amplifier based on power and efficiency contours estimation. IEEE Microwave and Wireless Components Letters 30 (8), pp.772 -774. (10.1109/LMWC.2020.3005833)
- Piacibello, A. et al., 2020. GaN Doherty MMIC power amplifiers for satellite Ka-band downlink. Presented at: 2020 International Workshop on Integrated Nonlinear Microwave and Millimetre-Wave Circuits (INMMiC) Cardiff, Wales 16-17 July 2020. 2020 International Workshop on Integrated Nonlinear Microwave and Millimetre-Wave Circuits (INMMiC). IEEE. , pp.1-3. (10.1109/INMMiC46721.2020.9160047)
- Quaglia, R. 2020. A review of technologies and design techniques of millimeter-wave power amplifiers. IEEE Transactions on Microwave Theory and Techniques 68 (7), pp.2957-2983. (10.1109/TMTT.2020.2989792)
- Quaglia, R. et al. 2020. Source/load-pull characterisation of GaN on Si HEMTs with data analysis targeting Doherty design. Presented at: 2020 IEEE Topical Conference on RF/Microwave Power Amplifiers for Radio and Wireless Applications (PAWR) San Antonio, TX, USA 26-29 January, 2020. 2020 IEEE Topical Conference on RF/Microwave Power Amplifiers for Radio and Wireless Applications (PAWR). IEEE. , pp.5-8. (10.1109/PAWR46754.2020.9035999)
2019
- Alt, A. et al. 2019. Impact of the input impedance on the linearity of supply modulated GaN HEMT power amplifiers. Presented at: European Microwave Week 2019 (EuMW2019) 29 September - 03 October 2019.
- Alt, A. et al. 2019. Class B* - A new high efficiency RF DC/DC converter concept using second harmonic generation/injection. Presented at: WPTC 2018: IEEE MTT-S Wireless Power Transfer Conference Montreal, Quebec 3-7 June 2018. 2018 IEEE Wireless Power Transfer Conference (WPTC). IEEE(10.1109/WPT.2018.8639317)
- Bogusz, A. et al. 2019. Design and characterisation of an outphasing power amplifier with balun combiner. Presented at: 2019 IEEE MTT-S International Microwave Conference on Hardware and Systems for 5G and Beyond (IMC-5G) Altanta, GA, USA 15-16 August 2019. 2019 IEEE MTT-S International Microwave Conference on Hardware and Systems for 5G and Beyond (IMC-5G). IEEE. , pp.1-3. (10.1109/IMC-5G47857.2019.9160351)
- Bogusz, A. et al. 2019. Wideband compact planar balun for applications in outphasing and push-pull amplifiers. Electronics Letters 55 (16), pp.912-914. (10.1049/el.2018.7915)
- Piacibello, A. et al., 2019. Optimisation of a Doherty power amplifier based on dual-input characterisation. Presented at: IEEE COMCAS 2019, International Conference on Microwave, Communication, Antennas & Electronic Systems Tel Aviv, Israel 4-6 November 2019. Published in: Piacibello, A. et al., 2019 IEEE International Conference on Microwaves, Antennas, Communications and Electronic Systems (COMCAS). IEEE(10.1109/COMCAS44984.2019.8958432)
- Quaglia, R. et al. 2019. A 1.8-3.2 GHz Doherty Power Amplifier in quasi-MMIC Technology. IEEE Microwave and Wireless Components Letters 29 (5), pp.345-347. (10.1109/LMWC.2019.2904883)
- Quaglia, R. and Lees, J. 2019. Simplified analysis of the effect of load variation in common Doherty power amplifier architectures. Presented at: 2019 IEEE Topical Conference on RF/Microwave Power Amplifiers for Radio and Wireless Applications (PAWR) Orlando, FL, USA 20-23 Jan 2019. IEEE Topical Conference on RF/Microwave Power Amplifiers for Radio and Wireless Applications (PAWR). IEEE
- Quaglia, R. , Powell, J. and Collins, D. 2019. Load modulated balanced amplifier. In: Webster, J. G. ed. The Wiley Encyclopedia of Electrical and Electronics Engineering. Vol 3.. Wiley-Blackwell
- 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 2019. MTT-S International Microwave Symposium (IMS). IEEE. , pp.698-701. (10.1109/MWSYM.2019.8700767)
2018
- Alt, A. et al. 2018. Comparing FET technologies in terms of their suitability for broadband envelope tracking power amplifiers. Presented at: InMMIC Brive La Gaillarde 5-6 July 2018. , pp.-.
- Alt, A. et al. 2018. Analysis of highly efficient self-synchronous class-F microwave rectifiers using waveform engineering. Presented at: 48th European Microwave Conference (EuMC) Madrid, Spain 23-27 Sep 2018. Proceedings of the 48th European Microwave Conference. Piscataway, NJ: IEEE. , pp.773-776. (10.23919/EuMC.2018.8541564)
- Bogusz, A. et al. 2018. Power and efficiency continuous modes in saturated GaN HEMT devices. Presented at: Inmmic 2018 Brive-La-Gaillarde, France 5- 6 July 2018.
- Collins, D. et al. 2018. Experimental characterization of a load modulated balanced amplifier with simplified input power splitter. Presented at: APMC 2018 Kyoto, Japan 6-9 Nov 2018.
- Moreno Rubio, J. J. et al. 2018. Design of a 87% fractional bandwidth Doherty Power Amplifier supported by a simplified bandwidth estimation method. IEEE Transactions on Microwave Theory and Techniques 66 (3), pp.1319-1327. (10.1109/TMTT.2017.2767586)
- Piacibello, A. et al. 2018. A Ku-band Compact MMIC PA based on Stacked GaAs pHEMT cells. Presented at: International Workshop on Integrated Nonlinear Microwave and Millimetre-wave Circuits (INMMIC) Brive La Gaillarde, France 5-6 Jul 2018. 2018 International Workshop on Integrated Nonlinear Microwave and Millimetre-wave Circuits (INMMIC). IEEE. (10.1109/INMMIC.2018.8429989)
- Piacibello, A. et al., 2018. Dual-input driving strategies for performance enhancement of a doherty power amplifier. Presented at: 2018 IEEE MTT-S International Wireless Symposium (IWS) Chengdu, China 6-10 May 2018. 2018 IEEE MTT-S International Wireless Symposium (IWS). IEEE. (10.1109/IEEE-IWS.2018.8400845)
- Powell, J. R. et al., 2018. A power reconfigurable high-efficiency $X$ -band power amplifier MMIC using the load modulated balanced amplifier technique. IEEE Microwave and Wireless Components Letters 28 (6), pp.527-529. (10.1109/LMWC.2018.2824560)
- Quaglia, R. , Camarchia, V. and Pirola, M. 2018. K-band combined GaAs monolithic Doherty power amplifier. Presented at: 2018 IEEE MTT-S International Wireless Symposium (IWS) Chengdu, China 6-10 May 2018. 2018 IEEE MTT-S International Wireless Symposium (IWS2018). IEEE. (10.1109/IEEE-IWS.2018.8400882)
- Quaglia, R. and Cripps, S. 2018. A load modulated balanced amplifier for telecom applications. IEEE Transactions on Microwave Theory and Techniques 66 (3), pp.1328-1338. (10.1109/TMTT.2017.2766066)
- Quaglia, R. et al. 2018. Analysis and characterization of a load modulated balanced amplifier for base-station applications. Presented at: 2018 11th German Microwave Conference (GeMiC) Freiburg, Germany 12-14 March 2018. 2018 11th German Microwave Conference (GeMiC). IEEE. , pp.1-4. (10.23919/GEMIC.2018.8335013)
2017
- Camarchia, V. et al., 2017. A design strategy for AM/PM compensation in GaN Doherty power amplifiers. IEEE Access 5 , pp.22244-22251. (10.1109/ACCESS.2017.2759164)
- Camarchia, V. et al., 2017. Power amplifier MMICs for 15 GHz microwave links in 0.25 mu m GaN technology. Presented at: 2017 Integrated Nonlinear Microwave and Millimetre-wave Circuits Workshop (INMMiC) Graz, Austria 20-21 April 2017. 2017 Integrated Nonlinear Microwave and Millimetre-wave Circuits Workshop (INMMiC). IEEE. (10.1109/INMMIC.2017.7927311)
- Quaglia, R. , Bell, J. J. and Cripps, S. 2017. New general formulation and experimental verification of harmonic clipping contours in high-frequency power devices. IEEE Transactions on Microwave Theory and Techniques 65 (10), pp.3903-3909. (10.1109/TMTT.2017.2687900)
- Quaglia, R. et al. 2017. A 4W Doherty power amplifier in GaN MMIC technology for 15GHz applications. IEEE Microwave and Wireless Components Letters 27 (4), pp.365-367. (10.1109/LMWC.2017.2678440)
- Quaglia, R. and Cripps, S. C. 2017. Harmonic clipping contours: numerical computation and extension to higher harmonics. Presented at: European Microwave Conference London, UK 3-7 Oct. 2016. Microwave Conference (EuMC), 2016 46th European. IEEE. , pp.405-408. (10.1109/EuMC.2016.7824365)
- Quaglia, R. et al. 2017. Design and characterization of a 1.7?2.7 GHz quasi-MMIC Doherty power amplifier. Presented at: 2017 IEEE MTT-S International Microwave Symposium (IMS) Honololu, HI, USA 4-9 June 2017. 2017 IEEE MTT-S International Microwave Symposium (IMS). IEEE. , pp.771-773. (10.1109/MWSYM.2017.8058689)
- Quaglia, R. , Shepphard, D. J. and Cripps, S. 2017. A reappraisal of optimum output matching conditions in microwave power transistors. IEEE Transactions on Microwave Theory and Techniques 65 (3), pp.838-845. (10.1109/TMTT.2016.2627557)
- Ramella, C. et al., 2017. High efficiency power amplifiers for modern mobile communications: The load-modulation approach. Electronics 6 (4) 96. (10.3390/electronics6040096)
2016
- Camarchia, V. et al., 2016. Characterization of a high power GaN device for class E PA design with non-sinusoidal stimulus. Presented at: 2016 11th European Microwave Integrated Circuits Conference (EuMIC) London, UK 3-4 October 2016. Microwave Integrated Circuits Conference (EuMIC), 2016 11th European. IEEE. , pp.53. (10.1109/EuMIC.2016.7777487)
- Giofrè, R. et al., 2016. A comprehensive comparison between GaN MMIC Doherty and combined class-AB power amplifiers for microwave radio links. International Journal of Microwave and Wireless Technologies 8 (4-5), pp.673-681. (10.1017/S175907871600012X)
- Iqbal, M. et al., 2016. A miniaturized wilkinson power divider for ultra wide-band operation. Presented at: 2016 21st International Conference on Microwave, Radar and Wireless Communications (MIKON)2016 21st International Conference on Microwave, Radar and Wireless Communications (MIKON). IEEE(10.1109/MIKON.2016.7492081)
- Moreno Rubio, J. et al. 2016. A 0.6-3.8GHz GaN Power Amplifier designed through a simple strategy. IEEE Microwave and Wireless Components Letters 26 (6), pp.446-448. http://. (10.1109/LMWC.2016.2549263)
- Quaglia, R. et al. 2016. GaN monolithic power amplifiers for microwave backhaul applications. Electronics 5 (2) 25. (10.3390/electronics5020025)
- Ramella, C. et al., 2016. Characterization-oriented design of a compact GaAs MMIC 3-stacked power cell. Presented at: Microwave, Radar and Wireless Communications (MIKON), 2016 21st International Conference on Krakow, Poland 9-11 May 2016. Microwave, Radar andWireless Communications (MIKON), 2016 21st International Conference on. IEEE(10.1109/MIKON.2016.7491950)
2015
- Camarchia, V. et al., 2015. The Doherty power amplifier: review of recent solutions and trends. IEEE Transactions on Microwave Theory and Techniques 63 (2), pp.559-571. (10.1109/TMTT.2014.2387061)
- Fersch, T. et al., 2015. Stacked GaAs pHEMTs: Design of a K-band power amplifier and experimental characterization of mismatch effects. Presented at: 2015 IEEE MTT-S International Microwave Symposium (IMS) Phoenix, AZ 17-22 May 2015. 2015 IEEE MTT-S International Microwave Symposium (IMS). IEEE(10.1109/MWSYM.2015.7166762)
- Giofre, R. et al., 2015. GaN-MMIC Doherty power amplifier with integrated reconfigurable input network for microwave backhaul applications. Presented at: 2015 IEEE MTT-S International Microwave Symposium (IMS) Phoenix, AZ 17-22 May 2015. 2015 IEEE MTT-S International Microwave Symposium (IMS). IEEE(10.1109/MWSYM.2015.7166763)
2014
- Camarchia, V. et al., 2014. Demonstration of inkjet-printed silver nanoparticle microstrip lines on alumina for RF power modules. Organic Electronics 15 (1), pp.91-98. (10.1016/j.orgel.2013.10.018)
- Chiolerio, A. et al., 2014. Hybrid Ag-based inks for nanocomposite inkjet printed lines: RF properties. Journal of Alloys and Compounds 615 (Supp 1), pp.S501-S504. (10.1016/j.jallcom.2013.12.174)
- Piazzon, L. et al., 2014. Effect of load modulation on phase distortion in Doherty power amplifiers. IEEE Microwave and Wireless Components Letters 24 (7), pp.505-507. (10.1109/LMWC.2014.2316507)
- Pirola, M. et al., 2014. 13-bit GaAs serial-to-parallel converter with compact layout for core-chip applications. Microelectronics Journal 45 (7), pp.864-869. (10.1016/j.mejo.2014.04.036)
- Quaglia, R. , Camarchia, V. and Pirola, M. 2014. Dual-band GaN MMIC power amplifier for microwave backhaul applications. IEEE Microwave and Wireless Components Letters 24 (6), pp.409-411. (10.1109/LMWC.2014.2313587)
- Quaglia, R. et al. 2014. Linear GaN MMIC combined power amplifiers for 7-GHz microwave backhaul. IEEE Transactions on Microwave Theory and Techniques 62 (11), pp.2700-2710. (10.1109/TMTT.2014.2359856)
- Quaglia, R. et al. 2014. K-Band GaAs MMIC Doherty power amplifier for microwave radio with optimized driver. IEEE Transactions on Microwave Theory and Techniques 62 (11), pp.2518-2525. (10.1109/TMTT.2014.2360395)
- Quaglia, R. et al. 2014. Experimental investigation of bias current and load modulation effects in phase distortion of GaN HEMTs. Electronics letters 50 (10), pp.773-775. (10.1049/el.2014.0983)
2013
- Camarchia, V. et al., 2013. Bandwidth extension of GaN Doherty power amplifier: Effect on power, efficiency and linearity. Presented at: 2013 IEEE International Wireless Symposium (IWS) Beijing, China 14-18 April 2013. 2013 IEEE International Wireless Symposium (IWS). IEEE. , pp.1-4. (10.1109/IEEE-IWS.2013.6616789)
- Camarchia, V. et al., 2013. 7 GHz MMIC GaN Doherty Power Amplifier with 47% efficiency at 7 dB output back-off. IEEE Microwave and Wireless Components Letters 23 (1), pp.34-36. (10.1109/LMWC.2012.2234090)
- Camarchia, V. et al., 2013. High-Efficiency 7 GHz Doherty GaN MMIC Power Amplifiers for mackhaul radio links. IEEE Transactions of Electron Devices 60 (10), pp.3592-3595. (10.1109/TED.2013.2274669)
- Quaglia, R. , Pirola, M. and Ramella, C. 2013. Offset lines in Doherty Power Amplifiers: analytical demonstration and design. IEEE Microwave and Wireless Components Letters 23 (2), pp.93-95. (10.1109/LMWC.2013.2241535)
2012
- Camarchia, V. et al., 2012. X-band wideband 5W GaN MMIC power amplifier with large-signal gain equalization. Presented at: 2012 Workshop on Integrated Nonlinear Microwave and Millimetre-wave Circuits Dublin, Ireland 3-4 September 2012. 2012 Workshop on Integrated Nonlinear Microwave and Millimetre-wave Circuits. IEEE. , pp.1-3. (10.1109/INMMIC.2012.6331935)
- Fang, J. et al., 2012. 3.5 GHz WiMAX GaN doherty power amplifier with second harmonic tuning. Microwave and Optical Technology Letters 54 (11), pp.2601-2605. (10.1002/mop.27132)
- Moreno Rubio, J. et al. 2012. 3–3.6-GHz wideband GaN Doherty Power Amplifier exploiting output compensation stages. IEEE Transactions on Microwave Theory and Techniques 60 (8), pp.2543-2548. (10.1109/TMTT.2012.2201745)
- Moreno Rubio, J. et al. 2012. Development of single-stage and doherty GaN-based hybrid RF power amplifiers for quasi-constant envelope and high peak to average power ratio wireless standards. Microwave and Optical Technology Letters 54 (1), pp.206-210. (10.1002/mop.26459)
2011
- Moreno Rubio, J. et al. 2011. A 22W 65% efficiency GaN Doherty Power Amplifier at 3.5 GHz for WiMAX applications. Presented at: 2011 Workshop on Integrated Nonlinear Microwave and Millimetre-Wave Circuits Vienna, Austria 18-19 April 2011. Integrated Nonlinear Microwave and Millimeterwave Circuits, INMMIC, International Workshop on. IEEE. , pp.1. (10.1109/INMMIC.2011.5773332)
2009
- Quaglia, R. et al. 2009. Behavioral modeling of GaN-based power amplifiers: impact of electrothermal feedback on the model accuracy and identification. Microwave and Optical Technology Letters 51 (11), pp.2789-2792. (10.1002/mop.24732)
Articles
- Al-Rawachy, A. et al. 2025. Automated Cardiff model complexity identification and parameters extraction from measured tailored A-pull data. IEEE Journal of Microwaves 5 (5), pp.1150-1161. (10.1109/JMW.2025.3600995)
- Azad, E. M. et al. 2022. New formulation of Cardiff behavioral model including DC bias voltage dependence. IEEE Microwave and Wireless Components Letters 32 (6), pp.607-610. (10.1109/LMWC.2022.3140653)
- Baddeley, A. , Quaglia, R. and Tasker, P. J. 2025. Calibration error reduction in millimeter-wave load-pull systems measuring highly-reflective loads. IEEE Transactions on Microwave Theory and Techniques 73 (6), pp.3552-3564. (10.1109/TMTT.2024.3495544)
- Bogusz, A. et al. 2019. Wideband compact planar balun for applications in outphasing and push-pull amplifiers. Electronics Letters 55 (16), pp.912-914. (10.1049/el.2018.7915)
- Camarchia, V. et al., 2014. Demonstration of inkjet-printed silver nanoparticle microstrip lines on alumina for RF power modules. Organic Electronics 15 (1), pp.91-98. (10.1016/j.orgel.2013.10.018)
- Camarchia, V. et al., 2017. A design strategy for AM/PM compensation in GaN Doherty power amplifiers. IEEE Access 5 , pp.22244-22251. (10.1109/ACCESS.2017.2759164)
- Camarchia, V. et al., 2013. 7 GHz MMIC GaN Doherty Power Amplifier with 47% efficiency at 7 dB output back-off. IEEE Microwave and Wireless Components Letters 23 (1), pp.34-36. (10.1109/LMWC.2012.2234090)
- Camarchia, V. et al., 2013. High-Efficiency 7 GHz Doherty GaN MMIC Power Amplifiers for mackhaul radio links. IEEE Transactions of Electron Devices 60 (10), pp.3592-3595. (10.1109/TED.2013.2274669)
- Camarchia, V. et al., 2015. The Doherty power amplifier: review of recent solutions and trends. IEEE Transactions on Microwave Theory and Techniques 63 (2), pp.559-571. (10.1109/TMTT.2014.2387061)
- Chen, P. et al. 2020. Look-up table method for optimising coupling ratio in broadband sequential power amplifiers. IET Microwaves Antennas and Propagation 14 (13), pp.1626-1634. (10.1049/iet-map.2019.1102)
- Chiolerio, A. et al., 2014. Hybrid Ag-based inks for nanocomposite inkjet printed lines: RF properties. Journal of Alloys and Compounds 615 (Supp 1), pp.S501-S504. (10.1016/j.jallcom.2013.12.174)
- Collins, D. J. et al. 2020. The orthogonal LMBA: a novel RFPA architecture with broadband reconfigurability. IEEE Microwave and Wireless Components Letters 30 (9), pp.888-891. (10.1109/LMWC.2020.3010817)
- Fang, J. et al., 2012. 3.5 GHz WiMAX GaN doherty power amplifier with second harmonic tuning. Microwave and Optical Technology Letters 54 (11), pp.2601-2605. (10.1002/mop.27132)
- Ghozati, S. U. and Quaglia, R. 2025. Ka-band single-pole double-throw switch in GaN MMIC technology. International Journal of Microwave and Wireless Technologies (10.1017/S1759078725000108)
- Giofrè, R. et al., 2016. A comprehensive comparison between GaN MMIC Doherty and combined class-AB power amplifiers for microwave radio links. International Journal of Microwave and Wireless Technologies 8 (4-5), pp.673-681. (10.1017/S175907871600012X)
- Guillena, E. et al., 2022. Reconfigurable DPD based on ANNs for wideband load modulated balanced amplifiers under dynamic operation from 1.8 to 2.4 GHz. IEEE Transactions on Microwave Theory and Techniques 70 (1), pp.453-465.
- Moreno Rubio, J. et al. 2016. A 0.6-3.8GHz GaN Power Amplifier designed through a simple strategy. IEEE Microwave and Wireless Components Letters 26 (6), pp.446-448. http://. (10.1109/LMWC.2016.2549263)
- Moreno Rubio, J. et al. 2012. 3–3.6-GHz wideband GaN Doherty Power Amplifier exploiting output compensation stages. IEEE Transactions on Microwave Theory and Techniques 60 (8), pp.2543-2548. (10.1109/TMTT.2012.2201745)
- Moreno Rubio, J. et al. 2012. Development of single-stage and doherty GaN-based hybrid RF power amplifiers for quasi-constant envelope and high peak to average power ratio wireless standards. Microwave and Optical Technology Letters 54 (1), pp.206-210. (10.1002/mop.26459)
- Moreno Rubio, J. et al. 2020. Design of a broadband power amplifier based on power and efficiency contours estimation. IEEE Microwave and Wireless Components Letters 30 (8), pp.772 -774. (10.1109/LMWC.2020.3005833)
- Moreno Rubio, J. J. et al. 2018. Design of a 87% fractional bandwidth Doherty Power Amplifier supported by a simplified bandwidth estimation method. IEEE Transactions on Microwave Theory and Techniques 66 (3), pp.1319-1327. (10.1109/TMTT.2017.2767586)
- Piacibello, A. et al., 2021. Evaluation of a stacked-FET cell for high-frequency applications (invited paper). International Journal of Numerical Modelling: Electronic Networks, Devices and Fields 34 (5) e2881. (10.1002/jnm.2881)
- Piacibello, A. et al., 2025. Design and extensive NPR characterization of a highly-linear SatCom GaN MMIC Doherty PA. IEEE Transactions on Microwave Theory and Techniques 73 (1), pp.156-166. (10.1109/TMTT.2024.3474092)
- Piacibello, A. et al., 2022. A 5-w gan doherty amplifier for ka-band satellite downlink with 4-ghz bandwidth and 17-db npr. IEEE Microwave and Wireless Components Letters 32 (8), pp.964-967. (10.1109/LMWC.2022.3160227)
- Piacibello, A. et al., 2024. High-gain and high-linearity MMIC GaN Doherty Power Amplifier with 3-GHz bandwidth for Ka-band satellite communications. IEEE Microwave and Wireless Technology Letters 34 (6), pp.765-768. (10.1109/LMWT.2024.3384306)
- Piacibello, A. et al. 2021. A simple method to identify parametric oscillations in power amplifiers using harmonic balance solvers. IEEE Microwave and Wireless Components Letters 31 (3), pp.269-271. (10.1109/LMWC.2021.3049939)
- Piazzon, L. et al., 2014. Effect of load modulation on phase distortion in Doherty power amplifiers. IEEE Microwave and Wireless Components Letters 24 (7), pp.505-507. (10.1109/LMWC.2014.2316507)
- Pirola, M. et al., 2014. 13-bit GaAs serial-to-parallel converter with compact layout for core-chip applications. Microelectronics Journal 45 (7), pp.864-869. (10.1016/j.mejo.2014.04.036)
- Powell, A. et al. 2025. Efficient output power configuration in a K-band power amplifier using a split-gate layout. International Journal of Microwave and Wireless Technologies (10.1017/S1759078725101682)
- Powell, J. R. et al., 2018. A power reconfigurable high-efficiency $X$ -band power amplifier MMIC using the load modulated balanced amplifier technique. IEEE Microwave and Wireless Components Letters 28 (6), pp.527-529. (10.1109/LMWC.2018.2824560)
- Quaglia, R. 2020. A review of technologies and design techniques of millimeter-wave power amplifiers. IEEE Transactions on Microwave Theory and Techniques 68 (7), pp.2957-2983. (10.1109/TMTT.2020.2989792)
- Quaglia, R. 2021. Improvement of small signal equivalent simulations for power and efficiency matching of GaN HEMTs. Electronics 10 (3) 263. (10.3390/electronics10030263)
- Quaglia, R. , Bell, J. J. and Cripps, S. 2017. New general formulation and experimental verification of harmonic clipping contours in high-frequency power devices. IEEE Transactions on Microwave Theory and Techniques 65 (10), pp.3903-3909. (10.1109/TMTT.2017.2687900)
- Quaglia, R. and Camarchia, V. 2022. PAWR 2023 [RWW 2023]. IEEE Microwave Magazine 23 (12), pp.30-30. (10.1109/MMM.2022.3203924)
- Quaglia, R. et al. 2009. Behavioral modeling of GaN-based power amplifiers: impact of electrothermal feedback on the model accuracy and identification. Microwave and Optical Technology Letters 51 (11), pp.2789-2792. (10.1002/mop.24732)
- Quaglia, R. et al. 2017. A 4W Doherty power amplifier in GaN MMIC technology for 15GHz applications. IEEE Microwave and Wireless Components Letters 27 (4), pp.365-367. (10.1109/LMWC.2017.2678440)
- Quaglia, R. , Camarchia, V. and Pirola, M. 2014. Dual-band GaN MMIC power amplifier for microwave backhaul applications. IEEE Microwave and Wireless Components Letters 24 (6), pp.409-411. (10.1109/LMWC.2014.2313587)
- Quaglia, R. et al. 2016. GaN monolithic power amplifiers for microwave backhaul applications. Electronics 5 (2) 25. (10.3390/electronics5020025)
- Quaglia, R. et al. 2014. Linear GaN MMIC combined power amplifiers for 7-GHz microwave backhaul. IEEE Transactions on Microwave Theory and Techniques 62 (11), pp.2700-2710. (10.1109/TMTT.2014.2359856)
- Quaglia, R. et al. 2014. K-Band GaAs MMIC Doherty power amplifier for microwave radio with optimized driver. IEEE Transactions on Microwave Theory and Techniques 62 (11), pp.2518-2525. (10.1109/TMTT.2014.2360395)
- Quaglia, R. and Cripps, S. 2018. A load modulated balanced amplifier for telecom applications. IEEE Transactions on Microwave Theory and Techniques 66 (3), pp.1328-1338. (10.1109/TMTT.2017.2766066)
- Quaglia, R. et al. 2014. Experimental investigation of bias current and load modulation effects in phase distortion of GaN HEMTs. Electronics letters 50 (10), pp.773-775. (10.1049/el.2014.0983)
- Quaglia, R. et al. 2019. A 1.8-3.2 GHz Doherty Power Amplifier in quasi-MMIC Technology. IEEE Microwave and Wireless Components Letters 29 (5), pp.345-347. (10.1109/LMWC.2019.2904883)
- Quaglia, R. et al. 2022. Load-modulated balanced amplifier: from first invention to recent development. IEEE Microwave Magazine 23 (12), pp.60-70. (10.1109/MMM.2022.3203940)
- Quaglia, R. , Pirola, M. and Ramella, C. 2013. Offset lines in Doherty Power Amplifiers: analytical demonstration and design. IEEE Microwave and Wireless Components Letters 23 (2), pp.93-95. (10.1109/LMWC.2013.2241535)
- Quaglia, R. et al. 2022. Mitigation of load mismatch effects using an orthogonal load modulated balanced amplifier. IEEE Transactions on Microwave Theory and Techniques 70 (6), pp.3329-3341. (10.1109/TMTT.2022.3167414)
- Quaglia, R. , Shepphard, D. J. and Cripps, S. 2017. A reappraisal of optimum output matching conditions in microwave power transistors. IEEE Transactions on Microwave Theory and Techniques 65 (3), pp.838-845. (10.1109/TMTT.2016.2627557)
- Ramella, C. et al., 2021. Watt-level 21-25 GHz integrated Doherty power amplifier in GaAs technology. IEEE Microwave and Wireless Components Letters 31 (5), pp.505-508. (10.1109/LMWC.2021.3069555)
- Ramella, C. et al., 2017. High efficiency power amplifiers for modern mobile communications: The load-modulation approach. Electronics 6 (4) 96. (10.3390/electronics6040096)
- Rubio, J. J. M. , Azad, E. M. and Quaglia, R. 2024. A differential combiner for quasi-complete cancellation of output capacitance in mm-wave power amplifiers with high- Q devices. IEEE Transactions on Microwave Theory and Techniques 72 (9), pp.5309-5318. (10.1109/TMTT.2024.3365932)
- Rubio, J. J. M. et al., 2021. 3-20 GHz GaN MMIC Power Amplifier Design Through a COUT Compensation Strategy. IEEE Microwave and Wireless Components Letters 31 (5), pp.469-472. (10.1109/LMWC.2021.3066282)
- Tian, M. et al. 2024. An extraction method based on artificial neural network techniques for novel Cardiff model with reasonable extrapolation behavior. IEEE Microwave and Wireless Components Letters 34 (1), pp.5-8. (10.1109/LMWT.2023.3329979)
- Tian, M. et al. 2025. Artificial neural network nonlinear transistor behavioral models: Structure and parameter determination process based on the Cardiff Model. IEEE Transactions on Microwave Theory and Techniques 73 (2), pp.745-759. (10.1109/TMTT.2024.3434959)
- Urvoy, J. et al. 2025. Orthogonal load-modulated balanced amplifier for back-off efficiency enhancement and agile frequency configuration. IEEE Transactions on Microwave Theory and Techniques (10.1109/TMTT.2025.3604180)
- van den Heuvel, I. et al. 2024. A baseband impedance cancellation technique for wideband multi-transistor amplifiers. IEEE Microwave and Wireless Technology Letters 34 (6), pp.777-780. (10.1109/LMWT.2024.3390594)
- Wang, T. et al., 2021. Machine-learning assisted optimisation of free-parameters of a dual-input power amplifier for wideband applications. Sensors 21 (8) 2831. (10.3390/s21082831)
- Yuan, T. et al. 2023. Output signal re-injection in load modulated balanced amplifiers for RF bandwidth improvement. IEEE Microwave and Wireless Components Letters 33 (10), pp.1458-1461. (10.1109/LMWT.2023.3305812)
Book sections
- Quaglia, R. , Powell, J. and Collins, D. 2019. Load modulated balanced amplifier. In: Webster, J. G. ed. The Wiley Encyclopedia of Electrical and Electronics Engineering. Vol 3.. Wiley-Blackwell
Conferences
- Alt, A. et al. 2018. Comparing FET technologies in terms of their suitability for broadband envelope tracking power amplifiers. Presented at: InMMIC Brive La Gaillarde 5-6 July 2018. , pp.-.
- Alt, A. et al. 2019. Impact of the input impedance on the linearity of supply modulated GaN HEMT power amplifiers. Presented at: European Microwave Week 2019 (EuMW2019) 29 September - 03 October 2019.
- Alt, A. et al. 2018. Analysis of highly efficient self-synchronous class-F microwave rectifiers using waveform engineering. Presented at: 48th European Microwave Conference (EuMC) Madrid, Spain 23-27 Sep 2018. Proceedings of the 48th European Microwave Conference. Piscataway, NJ: IEEE. , pp.773-776. (10.23919/EuMC.2018.8541564)
- Alt, A. et al. 2019. Class B* - A new high efficiency RF DC/DC converter concept using second harmonic generation/injection. Presented at: WPTC 2018: IEEE MTT-S Wireless Power Transfer Conference Montreal, Quebec 3-7 June 2018. 2018 IEEE Wireless Power Transfer Conference (WPTC). IEEE(10.1109/WPT.2018.8639317)
- Azad, E. M. et al. 2020. Gate bias incorporation into Cardiff behavioural modelling formulation. Presented at: IEEE/MTT-S International Microwave Symposium (IMS 2020) Los Angeles, CA, USA 4-6 August 2020. 2020 IEEE/MTT-S International Microwave Symposium (IMS). IEEE. , pp.420-423. (10.1109/IMS30576.2020.9223817)
- Azad, E. M. et al. 2024. Design and experimental characterization of an asymmetric GaN MMIC Doherty power amplifier for Ka-Band transmitters. Presented at: 19th European Microwave Integrated Circuits Conference (EuMIC) Paris, France 23-24 September 2024. 2024 19th European Microwave Integrated Circuits Conference (EuMIC). IEEE. , pp.158-161. (10.23919/eumic61603.2024.10732357)
- Azad, E. M. et al. 2022. DC-dependent Cardiff model from modulated supply and load-pull data. Presented at: 2022 Asia-Pacific Microwave Conference (APMC) Yokohama, Japan 29 November 2022 - 02 December 2022. Proceedings of 2022 Asia-Pacific Microwave Conference (APMC). IEEE. , pp.181-183. (10.23919/APMC55665.2022.9999796)
- Azad, E. M. et al. 2022. Load-pull data analysis of a GaN on SiC HEMT targeting multi bias Doherty design. Presented at: International Workshop on Integrated Nonlinear Microwave and Millimeterwave Circuits, INMMIC Cardiff, UK 7-8 April 2022. Proceedings of the 2022 International Workshop on Integrated Nonlinear Microwave and Millimetre-Wave Circuits. IEEE. (10.1109/INMMiC54248.2022.9762106)
- Azad, E. M. et al. 2022. Cardiff model utilization for predicting the response of multiple-input power amplifiers. Presented at: Mediterrannean Microwave Symposium (MMS) Pizzo Calabro, Italy 9-13 May 2022. Proceedings of Microwave Mediterranean Symposium (MMS). IEEE. (10.1109/MMS55062.2022.9825516)
- Baddeley, A. et al. 2022. Gate bias voltage dependence of Cardiff admittance model in Ka-band GaAs pHEMTs. Presented at: IEEE Topical Conference on RF/Microwave Power Amplifiers for Radio and Wireless Applications (PAWR) Las Vegas, NV, USA 16-19 January 2022. 2022 IEEE Topical Conference on RF/Microwave Power Amplifiers for Radio and Wireless Applications (PAWR). IEEE. , pp.8-10. (10.1109/PAWR53092.2022.9719858)
- Baddeley, A. et al. 2023. Millimeter-wave on-wafer large signal characterization system for harmonic source/load pull and waveform measurements. Presented at: 2023 IEEE/MTT-S International Microwave Symposium - IMS 2023 San Diego, USA 11-16 June 2023. Proceedings of the 2023 IEEE/MTT-S International Microwave Symposium (IMS). IEEE. , pp.1101-1104. (10.1109/IMS37964.2023.10187929)
- Bogusz, A. et al. 2018. Power and efficiency continuous modes in saturated GaN HEMT devices. Presented at: Inmmic 2018 Brive-La-Gaillarde, France 5- 6 July 2018.
- Bogusz, A. et al. 2019. Design and characterisation of an outphasing power amplifier with balun combiner. Presented at: 2019 IEEE MTT-S International Microwave Conference on Hardware and Systems for 5G and Beyond (IMC-5G) Altanta, GA, USA 15-16 August 2019. 2019 IEEE MTT-S International Microwave Conference on Hardware and Systems for 5G and Beyond (IMC-5G). IEEE. , pp.1-3. (10.1109/IMC-5G47857.2019.9160351)
- Bogusz, A. et al. 2024. Design and characterization of an MMIC current mode outphasing power amplifier. Presented at: IEEE/MTT-S International Microwave Symposium Washington, DC, USA 16-21 June 2024. Proceedings of IEEE/MTT-S International Microwave Symposium. IEEE. , pp.580-583. (10.1109/IMS40175.2024.10600335)
- Camarchia, V. et al., 2013. Bandwidth extension of GaN Doherty power amplifier: Effect on power, efficiency and linearity. Presented at: 2013 IEEE International Wireless Symposium (IWS) Beijing, China 14-18 April 2013. 2013 IEEE International Wireless Symposium (IWS). IEEE. , pp.1-4. (10.1109/IEEE-IWS.2013.6616789)
- Camarchia, V. et al., 2016. Characterization of a high power GaN device for class E PA design with non-sinusoidal stimulus. Presented at: 2016 11th European Microwave Integrated Circuits Conference (EuMIC) London, UK 3-4 October 2016. Microwave Integrated Circuits Conference (EuMIC), 2016 11th European. IEEE. , pp.53. (10.1109/EuMIC.2016.7777487)
- Camarchia, V. et al., 2012. X-band wideband 5W GaN MMIC power amplifier with large-signal gain equalization. Presented at: 2012 Workshop on Integrated Nonlinear Microwave and Millimetre-wave Circuits Dublin, Ireland 3-4 September 2012. 2012 Workshop on Integrated Nonlinear Microwave and Millimetre-wave Circuits. IEEE. , pp.1-3. (10.1109/INMMIC.2012.6331935)
- Camarchia, V. et al., 2017. Power amplifier MMICs for 15 GHz microwave links in 0.25 mu m GaN technology. Presented at: 2017 Integrated Nonlinear Microwave and Millimetre-wave Circuits Workshop (INMMiC) Graz, Austria 20-21 April 2017. 2017 Integrated Nonlinear Microwave and Millimetre-wave Circuits Workshop (INMMiC). IEEE. (10.1109/INMMIC.2017.7927311)
- Chaudry, K. , Quaglia, R. and Cripps, S. 2020. A load modulated balanced amplifier with linear gain response and wide high-efficiency output power back-off region. Presented at: 2020 International Workshop on Integrated Nonlinear Microwave and Millimetre-Wave Circuits (INMMiC) Cardiff, Wales 16-17 July 2020. 2020 International Workshop on Integrated Nonlinear Microwave and Millimetre-Wave Circuits (INMMiC). IEEE. , pp.1-3. (10.1109/INMMiC46721.2020.9160205)
- Chen, P. et al. 2020. Optimising linearity of envelope tracking power amplifier using baseband linearisation approach. Presented at: 2020 International Workshop on Integrated Nonlinear Microwave and Millimetre-Wave Circuits (INMMiC) Cardiff, Wales 16-17 July 2020. 2020 International Workshop on Integrated Nonlinear Microwave and Millimetre-Wave Circuits (INMMiC). IEEE. , pp.1-3. (10.1109/INMMiC46721.2020.9160347)
- Chen, P. et al. 2020. Efficiency enhancement of a broadband sequential power amplifier using envelope tracking. Presented at: 2020 International Workshop on Integrated Nonlinear Microwave and Millimetre-Wave Circuits (INMMiC) Cardiff, Wales 16-17 July 2020. 2020 International Workshop on Integrated Nonlinear Microwave and Millimetre-Wave Circuits (INMMiC). IEEE. , pp.1-3. (10.1109/INMMiC46721.2020.9160332)
- Collier, A. et al. 2025. Large-signal performance comparison of ion implant and mesa etch isolated AlGaN/GaN HEMT switches on silicon. Presented at: European Microwave Integrated Circuits Conference Utrecht, The Netherlands 23 September 2025. Proceedings of the 20th European Microwave Integrated Circuits Conference. IEEE. , pp.230-233. (10.23919/EuMIC65284.2025.11234588)
- Collins, D. et al. 2018. Experimental characterization of a load modulated balanced amplifier with simplified input power splitter. Presented at: APMC 2018 Kyoto, Japan 6-9 Nov 2018.
- Costanzo, F. et al., 2022. A GaN MMIC stacked doherty power amplifier for space applications. Presented at: IEEE Topical Conference on RF/Microwave Power Amplifiers for Radio and Wireless Applications (PAWR) Las Vegas, NV, USA 16-19 January 2022. Proceedings of Topical Conference on RF/Microwave Power Amplifiers for Radio and Wireless Applications (PAWR). IEEE. , pp.29-31. (10.1109/PAWR53092.2022.9719789)
- Davies-Smith, C. et al. 2022. An enhanced active load-pull algorithm for faster convergence. Presented at: European Microwave Week 2021 London, UK 2-7 April 2022. European Microwave Week 2021 "United in Microwaves" Conference Proceedings. IEEE. , pp.354. (10.23919/EuMC50147.2022.9784250)
- Fersch, T. et al., 2015. Stacked GaAs pHEMTs: Design of a K-band power amplifier and experimental characterization of mismatch effects. Presented at: 2015 IEEE MTT-S International Microwave Symposium (IMS) Phoenix, AZ 17-22 May 2015. 2015 IEEE MTT-S International Microwave Symposium (IMS). IEEE(10.1109/MWSYM.2015.7166762)
- Ghozati, S. U. et al. 2023. Load pull-driven behavioral modelling of microwave switches for the design of tunable reflective terminations. Presented at: EuMW 2024: European Microwave Week 2023 19 - 21 September 2023.
- Ghozati, S. U. , Baddeley, A. and Quaglia, R. 2024. Large-signal characterization and behavioral modeling of mm-wave GaN HEMT switches tailored for advanced power amplifier architectures. Presented at: 2024 IEEE Topical Conference on RF/Microwave Power Amplifiers for Radio and Wireless Applications (PAWR) 21-24 January 2024. Proceedings Topical Conference on RF/Microwave Power Amplifiers for Radio and Wireless Applications (PAWR). IEEE. , pp.21-23. (10.1109/PAWR59907.2024.10438592)
- Ghozati, S. U. et al. 2025. Cardiff behavioral model of a Ka-Band SPDT switch trained on structured minimization of load-pull characterization data. Presented at: 2025 International Workshop on Integrated Nonlinear Microwave and Millimetre-Wave Circuits Torino, Italy 10-11 April 2025. Proceedings of the International Workshop on Integrated Nonlinear Microwave and Millimetre-Wave Circuits. IEEE. , pp.1-4. (10.1109/INMMIC64198.2025.10975719)
- Giofre, R. et al., 2015. GaN-MMIC Doherty power amplifier with integrated reconfigurable input network for microwave backhaul applications. Presented at: 2015 IEEE MTT-S International Microwave Symposium (IMS) Phoenix, AZ 17-22 May 2015. 2015 IEEE MTT-S International Microwave Symposium (IMS). IEEE(10.1109/MWSYM.2015.7166763)
- Iqbal, M. et al., 2016. A miniaturized wilkinson power divider for ultra wide-band operation. Presented at: 2016 21st International Conference on Microwave, Radar and Wireless Communications (MIKON)2016 21st International Conference on Microwave, Radar and Wireless Communications (MIKON). IEEE(10.1109/MIKON.2016.7492081)
- Li, W. et al., 2023. Performance modeling and shaping function extraction for dual-input load modulated power amplifiers. Presented at: 2023 IEEE/MTT-S International Microwave Symposium - IMS 2023 San Diego, USA 11-16 June 2023. Proceedings of the 2023 IEEE/MTT-S International Microwave Symposium (IMS). IEEE. , pp.203-206. (10.1109/IMS37964.2023.10188039)
- Moreno Rubio, J. et al. 2011. A 22W 65% efficiency GaN Doherty Power Amplifier at 3.5 GHz for WiMAX applications. Presented at: 2011 Workshop on Integrated Nonlinear Microwave and Millimetre-Wave Circuits Vienna, Austria 18-19 April 2011. Integrated Nonlinear Microwave and Millimeterwave Circuits, INMMIC, International Workshop on. IEEE. , pp.1. (10.1109/INMMIC.2011.5773332)
- Piacibello, A. et al., 2020. GaN Doherty MMIC power amplifiers for satellite Ka-band downlink. Presented at: 2020 International Workshop on Integrated Nonlinear Microwave and Millimetre-Wave Circuits (INMMiC) Cardiff, Wales 16-17 July 2020. 2020 International Workshop on Integrated Nonlinear Microwave and Millimetre-Wave Circuits (INMMiC). IEEE. , pp.1-3. (10.1109/INMMiC46721.2020.9160047)
- Piacibello, A. et al., 2022. AM/PM characterization of wideband power amplifiers. Presented at: IEEE Topical Conference on RF/Microwave Power Amplifiers for Radio and Wireless Applications (PAWR) Las Vegas, NV, USA 16-19 January 2022. Proceedings of IEEE Topical Conference on RF/Microwave Power Amplifiers for Radio and Wireless Applications. IEEE. (10.1109/PAWR53092.2022.9719787)
- Piacibello, A. et al. 2018. A Ku-band Compact MMIC PA based on Stacked GaAs pHEMT cells. Presented at: International Workshop on Integrated Nonlinear Microwave and Millimetre-wave Circuits (INMMIC) Brive La Gaillarde, France 5-6 Jul 2018. 2018 International Workshop on Integrated Nonlinear Microwave and Millimetre-wave Circuits (INMMIC). IEEE. (10.1109/INMMIC.2018.8429989)
- Piacibello, A. et al., 2018. Dual-input driving strategies for performance enhancement of a doherty power amplifier. Presented at: 2018 IEEE MTT-S International Wireless Symposium (IWS) Chengdu, China 6-10 May 2018. 2018 IEEE MTT-S International Wireless Symposium (IWS). IEEE. (10.1109/IEEE-IWS.2018.8400845)
- Piacibello, A. et al., 2019. Optimisation of a Doherty power amplifier based on dual-input characterisation. Presented at: IEEE COMCAS 2019, International Conference on Microwave, Communication, Antennas & Electronic Systems Tel Aviv, Israel 4-6 November 2019. Published in: Piacibello, A. et al., 2019 IEEE International Conference on Microwaves, Antennas, Communications and Electronic Systems (COMCAS). IEEE(10.1109/COMCAS44984.2019.8958432)
- Powell, A. G. et al. 2024. Efficient output power configuration in a K-Band power amplifier using a split-gate layout. Presented at: 19th European Microwave Integrated Circuits Conference (EuMIC) Paris, France 23-24 September 2024. 2024 19th European Microwave Integrated Circuits Conference (EuMIC). IEEE. , pp.275-278. (10.23919/eumic61603.2024.10732591)
- Quaglia, R. , Camarchia, V. and Pirola, M. 2018. K-band combined GaAs monolithic Doherty power amplifier. Presented at: 2018 IEEE MTT-S International Wireless Symposium (IWS) Chengdu, China 6-10 May 2018. 2018 IEEE MTT-S International Wireless Symposium (IWS2018). IEEE. (10.1109/IEEE-IWS.2018.8400882)
- Quaglia, R. and Cripps, S. C. 2017. Harmonic clipping contours: numerical computation and extension to higher harmonics. Presented at: European Microwave Conference London, UK 3-7 Oct. 2016. Microwave Conference (EuMC), 2016 46th European. IEEE. , pp.405-408. (10.1109/EuMC.2016.7824365)
- Quaglia, R. , Cripps, S. and Powell, J. 2024. Impact of matching networks on the impedance settling time in high frequency power amplifiers. Presented at: 2024 IEEE Topical Conference on RF/Microwave Power Amplifiers for Radio and Wireless Applications (PAWR) 21-24 January 2024. Proceedings Topical Conference on RF/Microwave Power Amplifiers for Radio and Wireless Applications (PAWR) 2024. IEEE. , pp.28-30. (10.1109/PAWR59907.2024.10438584)
- Quaglia, R. et al. 2017. Design and characterization of a 1.7?2.7 GHz quasi-MMIC Doherty power amplifier. Presented at: 2017 IEEE MTT-S International Microwave Symposium (IMS) Honololu, HI, USA 4-9 June 2017. 2017 IEEE MTT-S International Microwave Symposium (IMS). IEEE. , pp.771-773. (10.1109/MWSYM.2017.8058689)
- Quaglia, R. and Lees, J. 2019. Simplified analysis of the effect of load variation in common Doherty power amplifier architectures. Presented at: 2019 IEEE Topical Conference on RF/Microwave Power Amplifiers for Radio and Wireless Applications (PAWR) Orlando, FL, USA 20-23 Jan 2019. IEEE Topical Conference on RF/Microwave Power Amplifiers for Radio and Wireless Applications (PAWR). IEEE
- Quaglia, R. et al. 2020. Source/load-pull characterisation of GaN on Si HEMTs with data analysis targeting Doherty design. Presented at: 2020 IEEE Topical Conference on RF/Microwave Power Amplifiers for Radio and Wireless Applications (PAWR) San Antonio, TX, USA 26-29 January, 2020. 2020 IEEE Topical Conference on RF/Microwave Power Amplifiers for Radio and Wireless Applications (PAWR). IEEE. , pp.5-8. (10.1109/PAWR46754.2020.9035999)
- Quaglia, R. et al. 2022. Effect of HEMT output characteristics on the load mismatch resilience in balanced power amplifiers. Presented at: 2022 International Workshop on Integrated Nonlinear Microwave and Millimetre-Wave Circuits (INMMiC) Cardiff, Wales 07-08 April 2022. 2022 International Workshop on Integrated Nonlinear Microwave and Millimetre-Wave Circuits (INMMiC). IEEE. , pp.1-3. (10.1109/INMMiC54248.2022.9762184)
- Quaglia, R. et al. 2018. Analysis and characterization of a load modulated balanced amplifier for base-station applications. Presented at: 2018 11th German Microwave Conference (GeMiC) Freiburg, Germany 12-14 March 2018. 2018 11th German Microwave Conference (GeMiC). IEEE. , pp.1-4. (10.23919/GEMIC.2018.8335013)
- Quaglia, R. et al. 2022. K-band GaAs Doherty power amplifiers for microwave backhaul. Presented at: 2022 International Workshop on Integrated Nonlinear Microwave and Millimetre-Wave Circuits (INMMiC) Cardiff, Wales 07-08 April 2022. 2022 International Workshop on Integrated Nonlinear Microwave and Millimetre-Wave Circuits (INMMiC). IEEE. , pp.1-3. (10.1109/INMMiC54248.2022.9762217)
- Ramella, C. et al., 2016. Characterization-oriented design of a compact GaAs MMIC 3-stacked power cell. Presented at: Microwave, Radar and Wireless Communications (MIKON), 2016 21st International Conference on Krakow, Poland 9-11 May 2016. Microwave, Radar andWireless Communications (MIKON), 2016 21st International Conference on. IEEE(10.1109/MIKON.2016.7491950)
- 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 2019. MTT-S International Microwave Symposium (IMS). IEEE. , pp.698-701. (10.1109/MWSYM.2019.8700767)
- Tian, M. et al. 2023. A novel Cardiff model coefficients extraction process based on artificial neural network. Presented at: 2023 IEEE Topical Conference on RF/Microwave Power Amplifiers for Radio and Wireless ApplicationsED, MAY BE LINKED Las Vegas, NV, USA 22-25 January 2023. 2023 IEEE Topical Conference on RF/Microwave Power Amplifiers for Radio and Wireless Applications. IEEE. (10.1109/PAWR56957.2023.10046221)
- Tian, M. et al. 2024. Application of the Cardiff Model for Orthogonal LMBA response prediction. Presented at: 2024 IEEE Topical Conference on RF/Microwave Power Amplifiers for Radio and Wireless Applications (PAWR) 21-24 January 2024. Proceedings Topical Conference on RF/Microwave Power Amplifiers for Radio and Wireless Applications (PAWR) 2024. IEEE. , pp.17-20. (10.1109/PAWR59907.2024.10438664)
- Urvoy, J. , Quaglia, R. and Cripps, S. C. 2025. Design and simulation of a Doherty-mode OLMBA for enhanced back-off efficiency over an octave bandwidth. Presented at: 2025 International Workshop on Integrated Nonlinear Microwave and Millimetre-Wave Circuits Torino, Italy 10-11 April 2025. Proceedings of the International Workshop on Integrated Nonlinear Microwave and Millimetre-Wave Circuits. IEEE. , pp.1-4. (10.1109/INMMIC64198.2025.10975674)
- Urvoy, J. et al. 2023. Experimental characterization of a dual-input OLMBA for back-off efficiency improvement. Presented at: 53rd European Microwave Conference (EuMC) Berlin, Germany 19-21 September 2023. Proceedings of 53rd European Microwave Conference. IEEE. , pp.267-270. (10.23919/EuMC58039.2023.10290592)
- Van Den Heuvel, I. et al. 2023. An envelope model for efficient prediction of the impact of wideband signals on power amplifier performance. Presented at: 2023 International Workshop on Integrated Nonlinear Microwave and Millimetre-Wave Circuits (INMMIC) 08-11 November 2023. 2023 International Workshop on Integrated Nonlinear Microwave and Millimetre-Wave Circuits (INMMIC). IEEE. (10.1109/INMMIC57329.2023.10321784)
- Van Den Heuvel, I. et al. 2025. Improved iterative envelope simulation for the efficient prediction of the impact of wideband modulated signals on power amplifier performance. Presented at: 2025 International Workshop on Integrated Nonlinear Microwave and Millimetre-Wave Circuits Torino, Italy 10-11 April 2025. Proceedings of the International Workshop on Integrated Nonlinear Microwave and Millimetre-Wave Circuits. IEEE. , pp.1-4. (10.1109/INMMIC64198.2025.10975660)
Research
Contracts
| Title | People | Sponsor | Value | Duration |
|---|---|---|---|---|
| E/D Band Amplifiers Feasibility Study | Dr Roberto Quaglia, Prof Paul Tasker, Dr Aleksander Bogusz | Private Company | 15,000 | 01/09/2025-14/11/2025 |
|
MUST-RF |
Dr Roberto Quaglia, Prof Paul Tasker, Prof Steve Cripps | EPSRC |
640,890 |
28/04/2025-27/04/2028 |
|
Reconfigurable couplers for RADAR applications |
Dr Roberto Quaglia, Prof Steve Cripps | Private Company |
34,743 |
01/09/2024-30/04/2025 |
|
Advancing large signal modelling of high frequency transistors by behavioural and state function model convergence |
Prof Paul Tasker, Dr Roberto Quaglia, Dr Jonathan Lees | CSA Catapult |
135,000 |
01/09/2024-31/08/2026 |
|
AURA |
Dr Roberto Quaglia, Prof Paul Tasker, Dr James Bell, Dr Jonathan Lees, Prof Khaled Elgaid, Dr Abdalla Eblabla | Parallel Wireless, CSA Catapult |
291,617 |
01/04/2024-28/02/2025 |
|
Advancing Control Circuits for Reconfigurable Broadband PAs |
Dr Roberto Quaglia, Prof Steve Cripps, Prof Paul Tasker | Private Company | 61,660 |
01/02/2024-31/12024 |
|
OPTIME-PA: Optimal MMIC design of E-band power amplifiers for Satcom using dedicated measurements and non-linear modelling |
Dr Roberto Quaglia, Prof Tasker | Innovate UK | 48,984 |
09/2023-01/2024 |
|
Broadband Amplifiers with Multiple Operation Modes |
Dr Roberto Quaglia, Prof SC Cripps | Private Company | 20,000 |
01/2022-12/2022 |
|
Linear Broadband Amplifier for Operation with Mismatched Loads |
Dr Roberto Quaglia, Prof SC Cripps | Private Company | 33,471 |
07/2022-12/2022 |
|
Measurement of GaN devices |
Dr Roberto Quaglia | ESA ESTEC | 15,789 |
08/2020-06/2021 |
|
Ka-Band power amplifiers for |
Dr Roberto Quaglia, Prof PJ Tasker | EPSRC IAA | 9,979 |
06/2021-12/2021 |
|
Broadband amplifier for operation |
Dr Roberto Quaglia, Prof SC Cripps | Private Company | 87,759 |
02/2021-02/2022 |
|
Broadband power amplifier design with flat power and efficiency response |
Prof SC Cripps, Dr Roberto Quaglia | Private Company | 52,894 |
11/2019-10/2020 |
|
Experimental characterisation of GaN transistors for load modulated applications with configurable drain bias voltage |
Dr R Quaglia, Dr J Bell, Prof PJ Tasker | Private Company | 81,500 |
10/2019-09/2023 |
|
Advanced broadband reconfigurable amplifiers concepts using novel circuit architectures and operating modes |
Dr R Quaglia, Prof S Cripps | Private Company | 179,433 |
09/2018-06/2019 |
| Non-linear (large signal) millimetre-wave devices, circuits and systems on-wafer characterisation facility | Prof P Tasker, Dr K Elgaid, Dr J Bell, Dr R Quaglia, Prof S Cripps, Prof J Benedikt, Dr J Lees | EPSRC | 1,463,185 |
10/2018-09/2019 |
| Single-chip Ka-band doherty amplifier | Dr Roberto Quaglia | European Space Agency | 70,886 |
06/2018-10/2020 |
| mm-wave power amplifiers for active antenna arrays | Dr R Quaglia, Dr J Lees, Prof S Cripps | Private Company | 73,200 |
11/2018-11/2019 |
| High efficiency power amplifiers for base-stations of the next mobile generation | Dr R Quaglia, Dr J Bell | Private Company | 45,067 |
01/2019-07/2022 |
| High efficiency PA architectures for dual-band operation | Dr R Quaglia, Prof S Cripps | Private Company | 361,202 |
08/2018-11/2020 |
Supervised Students
| Title | Student | Status | Degree |
|---|---|---|---|
| Broadband Techniques for Reconfigurable High-Efficiency PAs | Jean-Baptiste Urvoy | Current | PhD |
|
Reconfigurable power amplifiers for microwave applications |
Aquila Powell | Current | PhD |
|
Wireless power amplifier for |
Kris Yuan | Current | PhD |
| Improvement Of Transmitters Efficiency For Greener Mobile Networks |
Indy van den Heuvel | Current | PhD |
| Microwave reflective tunable termination with high power handling capability |
Seyed Ghozati | Current | PhD |
| Improving Power Amplifier design for bias Configurability | Ehsan Azad | Graduated | PhD |
|
Enhanced mm-wave load-pull for characterisation of CS technology |
Alexander Baddeley | Current | PhD |
| Advanced load modulated power amplifiers for wireless telecom applications |
Derek Kozel | Graduated | PhD |
Teaching
Undergraduate teaching:
I teach analogue and digital electronics (EN1215/EN1218) in the first year to Electronic and Integrated students.
Post-Graduate teaching:
I teach CAD and simulation software (ENT672), instrumentation (EN799/EN4089), modelling and measurement of solid state devices (ENT610/EN4910), and high frequency power amplifiers (ENT898) to MSc and MEng students in the areas of Microwave and Wireless, Communication Technologies and Compound Semiconductor Electronics.
I am year tutor for the MSc in these areas.
Biography
I graduated cum laude in Electronic Engineering from Politecnico di Torino in 2008.
I obtained my PhD from Politecnico di Torino, Italy, in 2012, where I have been working on power amplifier design, characterization and linearization.
From 2012 to 2014 I have been a Post-Doc fellow at Politecnico di Torino.
In 2015 I joined Huawei Technologies, where I designed millimetre-wave components for 5G prototypes.
I started my position at Cardiff University in September 2015 with a MSCA Fellowship from the European Union. The 2-year project PADWIC treated theory and techniques in power amplifier design for high frequency telecom applications, based on hybrid and integrated technologies.
In February 2017 I have been appointed as a Lecturer at the Schoool of Engineering of Cardiff University, a role that I started in September 2017.
I am in the review panels of the International Microwave Symposium and of the European Microwave Conferences, and a regular reviewer for the IEEE Transactions on Microwave Theory and Techniques and the IEEE Microwave and Wireless Components Letters.
I am the Elected Chair of the IEEE Microwave Theory and Techniques Society Technical Committe 12 "Microwave high-power techniques", with which I regularly organize workshops and special session at the main conferences in the sector.
Honours and awards
MTT-S 2024 Award for Best Papaer in the IEEE Microwage Magazine
2009 Young Graduated Research Fellowship presented by the GAAS Association.
2015 Individual Fellowship supported by the European Union in the Marie Sklodowska Curie scheme
Professional memberships
IEEE Member
MTT-S Member
IET Member
Committees and reviewing
I am an elected member of the IEEE MTT Technical Committee MTT-5 MICROWAVE HIGH-POWER TECHNIQUES
I am a reviewer for the EPSRC.
I am a reviewer for the IEEE Transaction on Microwave Theory and Techniques and the IEEE Microwave and Wireless Components Letters. I am in the reviweing board for the European Microwave Week.
Supervisions
I currently supervise 8 PhD students as main supervisor in the areas of high frequency power amplifier design, characterisation and modelling. I also co-supervise other students in similar areas.
I am interested in supervising PhD students in the areas of:
- Power amplifiers design and characterisation
- Microwave and millimetre-wave non-linear characterisation
- System level characterisation, modelling and linearisation
Current supervision
Past projects
- Enhancing Accuracy in Large-Signal Millimetre-Wave Measurement Systems
- ADVANCED LOAD MODULATED POWER AMPLIFIERS FOR WIRELESS TELECOM APPLICATIONS
- Efficiency Improvement In Base Station Power Amplifiers
Contact Details
[email protected]
+44 29208 70524
Queen's Buildings - Central Building, Room C/4.13, 5 The Parade, Newport Road, Cardiff, CF24 3AA
+44 29208 70524
Queen's Buildings - Central Building, Room C/4.13, 5 The Parade, Newport Road, Cardiff, CF24 3AA
