| 摘要 |
PROBLEM TO BE SOLVED: To keep the communication frequency band of an antenna multicoupler stable in a speed state and to reduce the current consumption of the antenna multicoupler in a standby state. SOLUTION: In a mobile communication terminal provided with the antenna multicoupler 2 that uses a plurality of different communication frequency bands and divides transmission reception signals depending on the differences of the frequencies, and a transmission circuit 5 and a reception circuit 3 that are connected to the antenna multicoupler 2 and operated at the same time, a control section 40 outputs a control signal Vc3 to the transmission circuit 5 to set an operating mode and a communication band switching control means 40a outputs a control signal Vc2 for setting the communication frequency band to a switch.conversion circuit 60. This switch.conversion circuit 60 discriminates the operating mode of the transmission circuit 5 from the control signal Vc3, converts the control signal Vc2 for setting the communication frequency band into a prescribed control voltage Vc1 and outputs the converted voltage to the antenna multicoupler 2 in a speed mode and stops outputting the control voltage to the antenna multicoupler 2 in a standby mode. |
