Chapter 7

Class-E with Quarterwave Transmission Line

Introduction

This chapter presents the results of exact time-domain analysis of switchmode Class-E power amplifiers with a quarterwave transmission line. The load network parameters are derived analytically. The ideal collector voltage and current waveforms demonstrate a possibility of 100% efficiency without overlapping each other. The load network implementation, including output matching circuit at RF and microwave frequencies using lumped and transmission-line elements, is considered with the accurate derivation of the matching circuit parameters. The switchmode Class-E power amplifiers with a quarterwave transmission line offer a new possibility for RF and microwave power amplification ...

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