Two-Way Doherty Power Amplifier Efficiency Enhancement by Incorporating Transistors’ Nonlinear Phase Distortion
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AbstractThis letter starts with describing the efficiency of two-way Doherty power amplifier (DPA) in the presence of the nonlinear phase distortion of the constituent transistors. Combined with the proper choice of the complex-valued load impedance's reactance, this analysis directed the design of DPA with enhanced efficiency over extended output back-off power region and bandwidth. Results of measurement conducted using a proof-of-concept demonstrator designed to operate in the frequency band ranging from 1.35 to 1.7 GHz revealed average efficiency of 59%-62% under 20-MHz long-term evolution modulated signal.
All Author(s) ListXiao-Hu Fang, Hao-Yu Liu, Kwok-Keung M. Cheng, Slim Boumaiza
Journal nameIEEE Microwave and Wireless Components Letters
Volume Number28
Issue Number2
Pages168 - 170
LanguagesEnglish-United States
KeywordsTransistors, Impedance, Phase distortion, Frequency measurement, Modulation, Impedance matching, Bandwidth

Last updated on 2021-18-01 at 01:54