Analysis of the effects of parasitic capacitance and inductance on inverse class E power amplifier

In this paper, an analysis is performed to determine the effects of the power transistor´s parasitic capacitance and inductance on the performance of inverse Class E power amplifiers. The theoretical analysis shows that the inverse Class E power amplifier´s performance does not monotonically vary with the increasing parasitic output capacitance. Numerical results are given to show the variations of output signal´s magnitude and phase, drain efficiency, and other parameters about the non-optimum switching conditions. After that, the equation to determine the maximum frequency of the inverse Class E power amplifier is also proposed.