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Transmission Line Load-Network Topology for Class E Power Amplifiers

Wilkinson, A.J. and Everard, J.K.A. (2001) Transmission Line Load-Network Topology for Class E Power Amplifiers. IEEE Transactions on Microwave Theory and Techniques, 49 (6). pp. 1202-1210. ISSN 0018 9480

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Class-E amplifiers are a type of switching amplifier offering very high efficiency approaching 100%. In this paper, a topology and design methodology, which could be used for a transmission-line implementation of a class-E power amplifier, is presented. A simple transmission-line class-E load network is proposed that offers combined transformation of the load resistance down to a suitable level, as well as simultaneous suppression of harmonics in the load. The load network was developed and tested with the aid of a time-domain simulator (i.e., SPICE). A microstrip layout was designed and a first prototype was built operating at 1 GHz utilizing a field-effect transistor as the switching device. A drain efficiency of 72% was measured for our prototype after tuning, although better performance can be expected with an improved switching transistor and careful tuning of the load network

Item Type: Article
Institution: The University of York
Academic Units: The University of York > Electronics (York)
Depositing User: York RAE Import
Date Deposited: 05 Aug 2009 10:13
Last Modified: 05 Aug 2009 10:13
Published Version: http://dx.doi.org/10.1109/22.925525
Status: Published
Publisher: IEEE Institute of Electrical and Electronics
Identification Number: 10.1109/22.925525
URI: http://eprints.whiterose.ac.uk/id/eprint/6352

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