Tuning analysis for the high-Q class-E power amplifier

Author

Cantrell, William H.

Author_Institution

Motorola Res. & Dev. Center, Fort Worth, TX, USA

Volume

48

Issue

12

fYear

2000

fDate

12/1/2000 12:00:00 AM

Firstpage

2397

Lastpage

2402

Abstract

The effects of component variations on a high-Q class-E amplifier are simulated and measured. Design equations are provided for the case of a 50% duty cycle with B at its optimum value for a given R. Six distinct operating points are analyzed for the output network. The problem of tuning a high-Q class-E amplifier is addressed. Normally, it cannot be tuned for maximum output power without degrading efficiency. An auxiliary circuit is added to the design so that it can be tuned for maximum output power in order to achieve optimum efficiency. Measured data are obtained at low frequencies for an amplifier with a loaded Q of 340

Keywords

Q-factor; circuit tuning; nonlinear network analysis; power amplifiers; radiofrequency amplifiers; switching circuits; auxiliary circuit; class-E power amplifier; component variations; design equations; high-Q power amplifier; optimum efficiency; switched mode circuit; tuning analysis; Circuit optimization; Degradation; Equations; Frequency measurement; High power amplifiers; Power amplifiers; Power generation; Q measurement; Tuned circuits; Tuning;

fLanguage

English

Journal_Title

Microwave Theory and Techniques, IEEE Transactions on

Publisher

ieee

ISSN

0018-9480

Type

jour

DOI

10.1109/22.898989

Filename

898989