A high power and high efficiency power amplifier for local multipoint distribution service

Abstract

This paper presents a high power and high efficiency MIC power amplifier using 0.2 /spl mu/m InGaAs-AlGaAs-GaAs pseudomorphic HEMT (PHEMT) devices. The average performance of the power amplifier is 8.75 dB small signal gain, 39.6% power-added-efficiency, and 37 dBm (5.0 W) from 27.5 to 29.5 GHz. At these power levels, the output power density was 780 mW/mm including output circuit losses. This represents the highest output power and efficiency ever reported at Ka-band using MIC amplifiers.