Abstract

Recenty a handy telephone has been developed and is going to replace a mobile telephone. A handy telephone utilizing batteries uses most of its DC power for its transmitter power amplifier. Therefore the transmitter power amplifier app­licable to a handy telephone has to be high efficiency (low power consumption). Also spurious specification of a telephone needs a stable transmitter power ampli fier. In this paper,we will describe the design philosophy of a high stability and high efficiency GaAs FET power amplifier applicable to a handy telephone. Also we will report the performance of the high stability and high efficiency GaAs FET high power amplifier we developed.