IEICE Electronics Express
Online ISSN : 1349-2543
ISSN-L : 1349-2543
LETTER
Frequency limitation of an optimum performance class-E power amplifier
Nam Ha-VanNinh Dang-DuyHyoungjun KimChulhun Seo
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2016 Volume 13 Issue 7 Pages 20160108

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Abstract

Class-E power amplifiers have found widespread application because of their design simplicity and high-efficiency operation. The nonlinear characteristic of the switching device significantly affects the power amplifier performance, although this is often neglected in theoretical analyses. In this paper, a class-E power amplifier with a shunt capacitance composed of nonlinear and linear capacitance has been mathematically analyzed to obtain the frequency limitation that governs maximum efficiency operation. The analytical method is presented to determine the effective operating frequency for any model of MOSFET device. The practical power amplifier circuit, using a MRF282 MOSFET, was implemented to verify the validity of the theoretical analysis.

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© 2016 by The Institute of Electronics, Information and Communication Engineers
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