Title :
Tuning analysis for the high-Q class-E power amplifier
Author :
Cantrell, William H.
Author_Institution :
Motorola Res. & Dev. Center, Fort Worth, TX, USA
fDate :
12/1/2000 12:00:00 AM
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;
Journal_Title :
Microwave Theory and Techniques, IEEE Transactions on
