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Number of items: 18.

Alt, Alexander ORCID: https://orcid.org/0000-0002-7621-4940 2021. Supply modulated GaN HEMT power amplifiers - From transistor to system. PhD Thesis, Cardiff University.
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Chen, Peng, Quaglia, Roberto ORCID: https://orcid.org/0000-0003-3228-301X, Lees, Jonathan ORCID: https://orcid.org/0000-0002-6217-7552, Merrick, Brian M., Alt, Alexander ORCID: https://orcid.org/0000-0002-7621-4940 and Tasker, Paul J. ORCID: https://orcid.org/0000-0002-6760-7830 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

Alt, Alexander ORCID: https://orcid.org/0000-0002-7621-4940, Villarruel-Parra, Alejandro, Chen, Peng, Alsahali, Sattam, Forsyth, Andrew, Tasker, Paul J. ORCID: https://orcid.org/0000-0002-6760-7830 and Lees, Jonathan ORCID: https://orcid.org/0000-0002-6217-7552 2020. Characterising the baseband impedance of supply modulators using simple modulated signals. 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/INMMiC46721.2020.9160186
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Chen, Peng, Alt, Alexander ORCID: https://orcid.org/0000-0002-7621-4940, Moreno Rubio, Jorge, Alsahali, Sattam, Lees, Jonathan ORCID: https://orcid.org/0000-0002-6217-7552, Quaglia, Roberto ORCID: https://orcid.org/0000-0003-3228-301X, Casbon, Michael ORCID: https://orcid.org/0000-0002-8637-9888 and Tasker, Paul J. ORCID: https://orcid.org/0000-0002-6760-7830 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, Peng, Quaglia, Roberto ORCID: https://orcid.org/0000-0003-3228-301X, Lees, Jonathan ORCID: https://orcid.org/0000-0002-6217-7552, Merrick, Brian M., Alt, Alexander ORCID: https://orcid.org/0000-0002-7621-4940 and Tasker, Paul ORCID: https://orcid.org/0000-0002-6760-7830 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., Alsahali, S., Alt, A. ORCID: https://orcid.org/0000-0002-7621-4940, Wang, G., Casbon, M. A. ORCID: https://orcid.org/0000-0002-8637-9888, Lees, J. ORCID: https://orcid.org/0000-0002-6217-7552 and Tasker, P. J. ORCID: https://orcid.org/0000-0002-6760-7830 2020. Flexible bandwidth reduction technique for envelope tracking using low-pass finite impulse response filters. Electronics Letters 56 (12) , pp. 586-589. 10.1049/el.2020.0194

Alsahali, S., Gecan, D., Alt, A. ORCID: https://orcid.org/0000-0002-7621-4940, Chen, P., Woodington, S., Sheikh, A., Tasker, P. ORCID: https://orcid.org/0000-0002-6760-7830 and Lees, J. ORCID: https://orcid.org/0000-0002-6217-7552 2020. Modulated rapid load pull system for the emulation of envelope tracking power amplifiers. Electronics Letters 56 (7) , pp. 325-328. 10.1049/el.2019.3896

Alsahali, Sattam, Alt, Alexander ORCID: https://orcid.org/0000-0002-7621-4940, Chen, Peng, Wang, Guofeng, Tasker, Paul and Lees, Jonathan ORCID: https://orcid.org/0000-0002-6217-7552 2019. Supply modulator ripple in envelope tracking systems - effects and countermeasures. Presented at: 49th European Microwave Conference (EuMC 2019), Paris, France, 01-03 October 2019. 2019 49th European Microwave Conference (EuMC). IEEE, pp. 710-713. 10.23919/EuMC.2019.8910890
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Mokhti, Zulhazmi A., Lees, Jonathan ORCID: https://orcid.org/0000-0002-6217-7552, Cassan, Cedric, Alt, Alexander ORCID: https://orcid.org/0000-0002-7621-4940 and Tasker, Paul J. ORCID: https://orcid.org/0000-0002-6760-7830 2019. The nonlinear drain-source capacitance effect on continuous-mode class-B/J power amplifiers. IEEE Transactions on Microwave Theory and Techniques 67 (7) , pp. 2741-2747. 10.1109/TMTT.2019.2918309
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Alt, Alexander ORCID: https://orcid.org/0000-0002-7621-4940, Hirshy, Hassan ORCID: https://orcid.org/0000-0003-0281-3681, Jiang, Sheng, Lee, Kean Boon, Casbon, Michael ORCID: https://orcid.org/0000-0002-8637-9888, Chen, Peng, Houston, Peter, Tasker, Paul ORCID: https://orcid.org/0000-0002-6760-7830 and Lees, Jonathan ORCID: https://orcid.org/0000-0002-6217-7552 2019. Analysis of gain variation with changing supply voltages in GaN HEMTs for envelope tracking power amplifiers. IEEE Transactions on Microwave Theory and Techniques 67 (7) , pp. 2495-2504. 10.1109/TMTT.2019.2916404
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Alsahali, Sattam, Gecan, Dragan, Alt, Alexander ORCID: https://orcid.org/0000-0002-7621-4940, Wang, Guofeng, Syed Anera, Syed M. H., Chen, Peng, Woodington, Simon, Sheikh, Aamir, Tasker, Paul ORCID: https://orcid.org/0000-0002-6760-7830 and Lees, Jonathan ORCID: https://orcid.org/0000-0002-6217-7552 2019. A novel modulated rapid load pull system with digital pre-distortion capabilities. Presented at: 2019 93rd ARFTG Microwave Measurement Conference (ARFTG), Boston, MA, USA, 7 June 2019. 10.1109/ARFTG.2019.8739220

Alt, Alexander ORCID: https://orcid.org/0000-0002-7621-4940, Chen, Peng, Alsahali, Sattam, Wang, Guofeng, Quaglia, Roberto ORCID: https://orcid.org/0000-0003-3228-301X, Tasker, Paul ORCID: https://orcid.org/0000-0002-6760-7830 and Lees, Jonathan ORCID: https://orcid.org/0000-0002-6217-7552 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, Alexander ORCID: https://orcid.org/0000-0002-7621-4940, Quaglia, Roberto ORCID: https://orcid.org/0000-0003-3228-301X, Chen, Peng, Alsahali, Sattam, Tasker, Paul ORCID: https://orcid.org/0000-0002-6760-7830 and Lees, Jonathan ORCID: https://orcid.org/0000-0002-6217-7552 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

Alt, Alexander ORCID: https://orcid.org/0000-0002-7621-4940, Quaglia, Roberto ORCID: https://orcid.org/0000-0003-3228-301X, Chen, Peng, Alsahali, Sattam, Tasker, Paul J. ORCID: https://orcid.org/0000-0002-6760-7830 and Lees, Jonathan ORCID: https://orcid.org/0000-0002-6217-7552 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

Chen, Peng, Alsahali, Sattam, Alt, Alexander ORCID: https://orcid.org/0000-0002-7621-4940, Lees, Jonathan ORCID: https://orcid.org/0000-0002-6217-7552 and Tasker, Paul J. ORCID: https://orcid.org/0000-0002-6760-7830 2018. Behavioral modeling of GaN power amplifiers using long short-term memory networks. Presented at: International Workshop on Integrated Nonlinear Microwave and Millimetre-wave Circuits (INMMIC), Brive La Gaillarde, France, 5-6 Jul 2018. International Workshop on Integrated Nonlinear Microwave and Millimetre-wave Circuits (INMMIC). IEEE, 10.1109/INMMIC.2018.8429984

Alt, Alexander ORCID: https://orcid.org/0000-0002-7621-4940, Chen, Peng, Alsahali, Sattam, Quaglia, Roberto ORCID: https://orcid.org/0000-0003-3228-301X, Tasker, Paul ORCID: https://orcid.org/0000-0002-6760-7830 and Lees, Jonathan ORCID: https://orcid.org/0000-0002-6217-7552 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. -.

Alt, Alexander ORCID: https://orcid.org/0000-0002-7621-4940 and Lees, Jonathan ORCID: https://orcid.org/0000-0002-6217-7552 2017. Improving efficiency, linearity and linearisability of an asymmetric doherty power amplifier by modulating the peaking amplifier’s supply voltage. Presented at: 20th EuMW 2017, Nuremberg, Germany, 8-13 October 2017. 2017 47th European Microwave Conference (EuMC). IEEE, pp. 464-467. 10.23919/EuMC.2017.8230890
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Alt, Alexander ORCID: https://orcid.org/0000-0002-7621-4940, Schwerg, Nikolai, Wangler, Christian and Gruner, Daniel 2017. Concept for the implementation of very high directivity and decade bandwidth in compact microstrip directional couplers. Presented at: 2016 46th European Microwave Conference (EuMC), London, UK, 3-7 October 2017. 2016 46th European Microwave Conference (EuMC). IEEE, pp. 210-213. 10.1109/EuMC.2016.7824315
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This list was generated on Fri Mar 14 07:55:10 2025 GMT.


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