Adaptive matching for efficiency enhancement ofGaN class-F power amplifiers

authored by

Mohamed Gamai El Din, Bernd Geck, H. Eul

Abstract

In this work a 6 W GaN based class-F amplifier is presented. The presented amplifier uses an adaptive matching output network to achieve high efficiency over 8.5 dB output dynamic range. The output matching network is an L matching network with a tunable inductor and a tunable capacitor. The tunable inductor is based on a λ/4 impedance inverter and a switchable capacitor bank. The tunable inductor presents a short circuit for the second harmonic and an open circuit to the third harmonic; additionally together with the tunable capacitor they present the optimum working impedance for the transistor. The designed amplifier has a power added efficiency of 72.0 % at an output power of 38 dBm and through using adaptive matching it can achieve a PAE of 58% at an output power of 29.5 dBm, in contrast to a PAE of only 26% in the case of using a fixed matching network.

Organisation(s)

Institute of Microwave and Wireless Systems

Type

Conference contribution

Publication date

2009

Publication status

Published

Peer reviewed

Yes

ASJC Scopus subject areas

Computer Networks and Communications, Hardware and Architecture, Electrical and Electronic Engineering

Electronic version(s)

https://doi.org/10.1109/IMWS2.2009.5307863 (Access: Closed)

 

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