An antenna switch MMIC using E/D mode p-HEMT for GSM/DCS/PCS/WCDMA bands application

A monolithic antenna switch IC using enhancement and depletion (E/D) -mode AlGaAs/InGaAs pseudomorphic high electron mobility transistors (p-HEMTs) has been developed for GSM/DCS/PCS/WCDMA band digital mobile communication systems. This antenna switch MMIC achieves a low insertion loss and small chip size using a single pole double throw (SPDT) switch for GSM and single pole 4 throw (SP4T) switch for other band configurations, as well as internal logic circuits with an E/D mode p-HEMTs process. This MMIC achieves an insertion loss of 0.21 dB at 915 MHz and 0.53 dB at 1785 MHz. The isolation to the RX ports is more than 30 dB, and the input power at 0.1 dB compression is over 36 dBm at +2.7 V operation.