NDLI: An Extended Topology of Parallel-Circuit Class-E Power Amplifier to Account for Larger Output Capacitances

Content Provider	IEEE Xplore Digital Library
Author	Cumana, J. Grebennikov, A. Guolin Sun Kumar, N. Jansen, R.H.
Copyright Year	1963
Abstract	This paper presents a modified parallel-circuit class-E amplifier that accommodates devices with larger output capacitances, recovering the class-E operating conditions. The finite inductor in the parallel circuit topology is replaced by a more suitable network composed of a series inductor and additional subharmonic resonators. Analysis of the class-E amplifier allows to determine the required frequency-domain response of this new network. Derivation of the circuit elements of the proposed network is shown in detail, and a design procedure for this modified class-E is provided. The analysis is validated by simulation and design of a test board. Measurements of the test board showed a drain efficiency of 80.7%, power-added efficiency of 78.6%, and output power of 4.91 W at 434 MHz, exhibiting levels of efficiency similar to that obtained by other amplifiers using the same device, but at much lower frequencies. According to the authors' knowledge, this study represents the first systematic approach to design class-E power amplifiers at UHF using devices with larger C_OUT by taking into account the use of arbitrary finite-feed class-E topologies.
Sponsorship	IEEE Microwave Theory and Techniques Society
Starting Page	3174
Ending Page	3183
Page Count	10
File Size	1773448
File Format	PDF
ISSN	00189480
Volume Number	59
Issue Number	12
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2011-12-01
Publisher Place	U.S.A.
Access Restriction	One Nation One Subscription (ONOS)
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Capacitance Inductors Harmonic analysis Topology Power amplifiers Frequency domain analysis Impedance inductive compensation Class E excess capacitance finite feed frequency domain high efficiency
Content Type	Text
Resource Type	Article
Subject	Condensed Matter Physics Electrical and Electronic Engineering Radiation

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