HIGH FREQUENCY MODULE

摘要

A high frequency module includes a GaAs switch (GaAsSW) that is an FET switch for selectively connecting one of RF input/output terminals (RF1-RF4) to an antenna input/output terminal (ANT) connected to an antenna. The RF input/output terminal (RF1) of the GaAs switch (GaAsSW) is connected through a low pass filter (LPF1) to a GSM transmission signal input terminal (Tx12). The RF input/output terminal (RF2) is connected through a low pass filter (LPF2) to a DCS/PCS transmission signal input terminal (Tx34). The RF input/output terminal (RF3) is connected through a diplexer (DiPX10) to a GSM850 reception signal output terminal (Rx1) and to a PCS reception signal output terminal (Rx4). The RF input/output terminal (RF4) is connected through a diplexer (DiPX20) to a GSM900 reception signal output terminal (Rx2) and to a DCS reception signal output terminal (Rx3).