A low cost linear AlGaAs/GaAs HBT MMIC power amplifier with active bias sensing for PCS applications

Abstract

A dual RF input high linearity power amplifier for PCS bands from 1850 to 1910 MHz has been developed for TDMA/CDMA applications. It features on die, input switching, active bias sensing and regulation, 50/spl Omega/ input matching and power down control. A single positive supply voltage is required. This amplifier is packaged in a low cost plastic super small SSOP-16 package. In digital operation adjacent channel power rejection is better then 30 dBc at 800 mW and 22 dB of gain. Maximum output power is 2 W. Typical high power added efficiency (PAE) is 40%.