基于LDMOS器件的F类功率放大器设计

he paper presents a design of Class-F power amplifier working at 1.8GHz,by using the LDMOS transistor as the active element in order to generate high output power and high efficiency.The Class-F power amplifier improves efficiency and output power by tuning for different harmonics to shape its drain-voltage and drain-current waveforms,the drain voltage approximates a square wave with one and more odd harmonics.At the same the drain current approximates a half sine wave with one and more even harmonics.The simulation shows that the amplifier achieved 12w output power and above 70% efficiency which is more than Class-AB amplifier at the same output power level.