ANTENNA MULTICOUPLER CONTROL CIRCUIT AND MOBILE PHONE HAVING THE CIRCUIT

摘要

PROBLEM TO BE SOLVED: To provide an antenna multicoupler control circuit and a mobile phone having the circuit where a pass band is switched into 3 steps or over so as to make the pass bandwidth of the multicoupler narrower thereby enhancing the basic performance of the frequency band shift type antenna multicoupler such as an insertion loss, an in-band loss deviation and an attenuation and downsizing the multicoupler. SOLUTION: A digital/analog converter 22 receiving a pass band control signal 12 applies an optional transmission band control voltage 16 to a transmitter side control terminal 9 of the frequency band shift type antenna multicoupler 2 and an optional reception band control voltage 17 to a receiver side control terminal 10 of the frequency band shift type antenna multicoupler 2 to switch the pass band of the frequency band shift type antenna multicoupler 2 into 3 steps or over.