| 摘要 |
PURPOSE: To realize the antenna multlcoupler which can be miniaturized as a whole and reduces the insertion loss. CONSTITUTION: A three-terminal circulator element 63 is provided which has a first terminal CTX connected to a transmission circuit and has a second terminal CANT connected to a first antenna 4 and has a third terminal CRX connected to a terminating resistance 64 through a first switch element 62, and a second switch element 60 through which the third terminal of the circulator element is connected to a reception circuit and a third switch element 61 through which a second antenna 22 is connected to the reception circuit constitute an antenna multicoupler 55. Thus, it is unnecessary to use a duplexer circuit having a large insertion loss, and the whole of the device is miniaturized and the insertion loss is reduced. |
