HIGH FREQUENCY MODULE

摘要

A smaller-sized, high frequency module for transmitting and receiving, for example, GSM/DCS/PCS/WCDMA communication signals by use of a single antenna is made at a low cost. There are included a diplexer (DiPX2) for separating communication signals from an antenna into GSM communication signals of a lower frequency band and PCS/DCS/WCDMA communication signals of higher frequency bands; a diode switch circuit (SW1) connected to an input/output terminal (P21) of the GSM communication signals of the diplexer (DiPX2) for switching the transmission/reception of the GSM communication signals; and a multi-branch GaAs IC switch (GaAs SW) connected to the input/output terminal of the PCS/DCS/WCDMA communication signals of the diplexer (DiPX2) for switching the transmission/reception of these signals. The patterns of control signals (VcG,Vc1,Vc2) to be applied to the diode switch circuit (SW1) and GaAs IC switch (GaAs SW) are changed to switch the transmission/reception of the four types of communication signals.