2250 MHz class-D high -efficiency microwave power amplifier

This dissertation will focus on developing a sophisticated switching technique to enhance the DC-to-RF conversion efficiency of a microwave power amplifier. For years, switching techniques implemented in the 10 kHz to 30 MHz regime resulted in indisputable results, namely that these modern power amplifiers could realize a DC-to-RF conversion efficiency of 90--95 percent.;However, in modern microwave communication systems the characteristic DC-to-RF conversion efficiency only approaches 10 percent. From published papers and definitive designs, existing research will be implemented to aid in the development of a High-Efficiency Microwave Power Amplifier (HEMPA).;Unlike conventional techniques of power amplification, the application of switching techniques greatly diminishes the intrinsic power losses incurred by the amplifier power devices. By reducing these inherent power losses, less power is demanded for the same operating constraints.;This investigation will provide experimental data that will enhance the performance of microwave communication systems. These enhanced communication systems could then be integrated into future NASA payloads. By enhancing the efficiency of the power amplifier---historically the highest consumer of power on a spacecraft---larger and more sophisticated payloads can be advanced. These larger payloads will have a commensurate increase in effective research.