16 October 2008 RF power amplifier design for high-efficiency applications
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In this paper a time domain waveform measurement system with active harmonic load-pull has been used to enhance the design cycle of RF power amplifiers (PAs). Wave-shaping (waveform engineering) techniques using Cardiff University's high power waveform measurement system have yielded optimum device conditions enabling a rapid PA realisation with a first-pass success. The resulting inverse class-F design, based on a 10W GaN HEMT device, is operating at 0.9GHz, and achieving 81.5% drain efficiency in both the load-pull emulated state and also in the directly realised PA. The value of measured waveforms, and the ability to engineer optimum waveforms to a specific amplifier mode, is demonstrated in this study.
© (2008) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
Peter Wright, Peter Wright, Chris Roff, Chris Roff, T. Williams, T. Williams, J. Lees, J. Lees, J. Benedikt, J. Benedikt, P. J. Tasker, P. J. Tasker, } "RF power amplifier design for high-efficiency applications", Proc. SPIE 7112, Unmanned/Unattended Sensors and Sensor Networks V, 71120T (16 October 2008); doi: 10.1117/12.801890; https://doi.org/10.1117/12.801890

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