Patent ID: 7545759

Claim:
An method for controlling a high-frequency switchingmodule comprising a diplexer comprising first and second filter circuits F 1 , F 2 for dividing signals received by an antenna to a receiving signal of a first transmitting/receiving system and a receiving signal of second and third transmitting/receiving systems, a first switching circuit SW 1 disposed downstream of said first filter circuit F 1 for switching a transmitting circuit TX 1 and a receiving circuit RX 1 of said first transmitting/receiving system by voltage applied from a control circuit VC 1 , and a second switching circuit SW 2 disposed downstream of said second filter circuit F 2 for switching a transmitting circuit TX 2 of said second and third transmitting/receiving systems, a receiving circuit RX 2 of said second transmitting/receiving system and a receiving circuit RX 3 of said third transmitting/receiving system by voltage applied from control circuits VC 2 , and VC 3 wherein the transmitting circuit TX 1 of said first transmitting/receiving system in said first switching circuit SW 1 is connected to said antenna by applying a positive voltage from said control circuit VC 1 , and further at the same time by applying a positive voltage from said control circuit VC 3 in controlling a switch circuit of said high-frequency switching module for switching a second receiving circuit RX 2 and a third receiving circuit RX 3 by voltage applied from said control circuit VC 3 .