Optimal fundamental load modulation for harmonically tuned switch mode power amplifier
作者： Xiang Li , Mohamed Helaoui , Fadhel Ghannouchi
DOI: 10.1109/MWSYM.2016.7540150
关键词: Amplifier 、 Impedance bridging 、 Power factor 、 Smith chart 、 Harmonic 、 Linear amplifier 、 Control theory 、 Load pull 、 Engineering 、 Power bandwidth
摘要: This paper presents a mathematical model, along with simulation and experimental validation for the optimal fundamental load modulation design space harmonically tuned switch mode power amplifiers. Starting from conventional class-F−1 PA on real impedances axis, it is shown mathematically that by moving one of harmonic terminations edge smith chart (purely reactive impedance), optimum trajectory moved away axis to complex impedance maintains constant high efficiency different output back-off values. A 10 W GaN transistor measured in pull system at 2.14 GHz order validate theory.
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