Written by tuzs
Ganbayev A., Filin V.
Optimal Energy Characteristics and Working Parametries of RF Switch Mode Power Amplifier Based on Controllable Current Fed Resonant Invertor
- Abstract: This article represents us the method for power losses minimizing in transistors of a radio frequency key generator (power amplifying) based on the control method application with overlapping pulses. We see fully formed requirements for the optimal excitation mode, providing maximum efficiency and maximum operating frequency, taking into account the finite times of switching on and off the generator GaN transistors. The article shows the obtained analytical equations for calculating power in a load, loss of efficiency, as well as equations for estimating the maximum operating frequency of the generator depending on the permissible level of losses. The article presents graphics of curves that determine the maximum operating frequency of an RF generator for permissible switching losses on various types of GaN transistors.
- Keywords: Switch mode power amplifier, generator, power efficiency, pulse-width modulation (PWM), controlled current-fed resonant inverter