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Performance study of an inverse class E power amplifier with series tunable parallel resonant tank

Published online by Cambridge University Press:  25 March 2011

Tao Cao ,
Songbai He  and
Fei You
Tao Cao*
Affiliation:
Institute of Electronic Engineering, China Academy of Engineering Physics, Sub-Box 517 of P.O. Box 919, Mianyang, Sichuan, P.R. China. Phone: +86 816 2493651
Songbai He
Affiliation:
School of Electronic Engineering, University of Electronic Science and Technology of China, Chengdu, Sichuan, P.R. China
Fei You
Affiliation:
School of Electronic Engineering, University of Electronic Science and Technology of China, Chengdu, Sichuan, P.R. China
*
Corresponding author: T. Cao Email: caotaog@gmail.com
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Abstract

An analysis of operation of a modified inverse class E power amplifier is presented. The proposed amplifier that has a series tunable parallel resonant tank is similar to a hybrid of class F and inverse class E. The principles and design equations required to determine the optimum operation of the amplifier are analyzed in detail. The practical circuit using LDMOS MRF21010 is shown to be able to deliver 40.02 dBm outpout power at 155 MHz. The amplifier achieves power-added efficiency (PAE) of 78.18% and drain efficiency of 78.42%, and exhibits 25.02 dB power gain when operates from a 21 V supply voltage. Comparisons of simulated and measured results are given with good agreement between them being achieved.

Keywords

Inverse class E amplifierclass Fzero current switchinghigh efficiency
Type
Research Papers
Information
International Journal of Microwave and Wireless Technologies , Volume 3 , Issue 4 , August 2011 , pp. 405 - 413
Copyright
Copyright © Cambridge University Press and the European Microwave Association 2011

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