A high performance GaAs MMIC transceiver for personal handy phone system (PHS)

A high performance GaAs MMIC transceiver has been developed for the Personal Handy phone System (PHS), Japan´s digital cordless telephone system. The MMIC includes a T/R switch, a Low Noise Amplifier (LNA) and a Power Amplifier (PA), which offers significant advantages in RF performance in comparison with silicon devices. In receive mode, the power gain and the noise figure including T/R switch are 15 dB and 2.4 dB, respectively. In transmit mode, the MMIC including T/R switch exhibits an overall power added efficiency (PAE)-of 25.5% and produces an output power of 21 dBm with an adjacent channel leakage power (Padj) of ¿56.2 dBc (600 kHz offset) at 1.9 GHz for ¿/4-shift QPSK modulated signal. A very small chip size of 1.0 mm × 2.7 mm is also realized. This is one of the smallest GaAs MMICs that have been reported with the same functionality.