| 摘要 |
A method for controlling a high-frequency switching module 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 the first filter circuit F 1 for switching a transmitting circuit TX 1 and a receiving circuit RX 1 of the first transmitting/receiving system by voltage applied from a control circuit VC 1, and a second switching circuit SW 2 disposed downstream of the second filter circuit F 2 for switching a transmitting circuit TX 2 of the second and third transmitting/receiving systems, a receiving circuit RX 2 of the second transmitting/receiving system and a receiving circuit RX 3 of the third transmitting/receiving system by voltage applied from control circuits VC 2, VC 3, the method comprising applying a positive voltage from the control circuit VC 1 to the first switch circuit SW 1 to connect the transmitting circuit TX 1 of the first transmitting/receiving system to the antenna, and applying a positive voltage from the control circuit VC 3.
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