THE RESEARCH OF CLASS E POWER AMPLIFIER MODEL WITH HIGH EFFICIENCY

The paper deals with the process of the design procedure and implementation of a modern switch-mode class E power amplifier model that theoretically could give up to 100 % efficiency due to minimizing the power dissipated during the transistor on-off transition, even if the switching time of it takes a significant fraction of the signal period. The primary purpose was designing an effective mathematical model, based on which it can be possible to obtain a practical model of class E amplifier with parameters corresponding with calculated. Mathematical calculations gave us results with an accuracy of 98 %, converging with the practical measurements. According to analytical calculations with quality factor 8, the output load current is sinusoidal (–20dB second harmonic). Modeling results confirmed the methodology of calculation and the practical model was used to design a laboratory stand for studying and researching class E amplifiers.