A Joint Linearity-Efficiency Model of Radio Frequency Power Amplifiers

TitleA Joint Linearity-Efficiency Model of Radio Frequency Power Amplifiers
Publication TypeConference Paper
Year of Publication2016
AuthorsEnzinger, H., Freiberger K., & Vogel C.
Conference NameIEEE International Symposium on Circuits and Systems (ISCAS)
Conference LocationMontreal, Canada
Abstract

We present an analytical model of the joint linearity-efficiency behavior of radio frequency power amplifiers. The model is derived by Fourier series analysis of a generic amplifier circuit including both strong nonlinearity due to current-clipping as well as weak nonlinearity due to transconductance variation. By selection of the biasing point, common amplifier classes like class A, class B and class AB can be modeled. For numerical evaluation, the model reduces to two lookup-tables, which makes it well suited for high-level system simulations. In an application example we demonstrate how the model can be used to simulate the error-vector-magnitude and the average efficiency for specific single-carrier and multi-carrier modulation schemes.

Citation KeyEnzinger16
SPSC cross-references
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Enzinger16 - Efficiency - Paper.pdf496.36 KB
Enzinger16 - Efficiency - Presentation.pdf1.4 MB