Application Note: T/R Switch For IMT-2000 Handset Applications

This article from Skyworks Solutions addresses a handset T/R switch design that enables its antennas to be electronically connected to either the transmitter or receiver. It covers both the 1885 - 1980 MHz transmit band (uplink) and the 2110 - 2170 MHz receive band (downlink). Since the T/R switch is placed at the RF front end of the handset, it has significant influence on transmitter efficiency, receiver sensitivity, and battery consumption.