An ultra-low distortion 3P2T antenna switch MMIC for dual-band W-CDMA applications

We propose an ultra-low distortion 3P2T antenna switch MMIC for dual-band W-CDMA systems. The switch MMIC consists of a GaAs MMIC with 0.4 /spl mu/m-gate p-HEMT and Si CMOS IC with a decoder and charge pump circuit. Ultra-low distortion and low insertion loss were achieved by controlling 2-stacked FETs with a voltage of 7 V up-converted from a supply voltage of 2.4 V. The switch MMIC provides IMD2 and IMD3 levels less than -110 dBm, which well satisfies the out-of-band blocking specification for W-CDMA systems. The MMIC shows insertion loss of 0.27 dB for 800 MHz and 0.38 dB for 2 GHz bands.