| 摘要 |
PURPOSE:To prevent the interruption of a communication line due to deviation of an antenna beam in the directivity even when the transmitter-receiver is small sized transmitter-receiver such as of a wrist watch type by providing a means detecting a reception power and the reception direction and sending the both or the one to the communicator. CONSTITUTION:In a small sized transmitter-receiver 1 used for mobile body communication, a receiver 4 is provided with a detection section (reception power detector) detecting a reception power and a detection section (reception direction detector) detecting the reception direction. The receiver 4 outputs a reception level signal VL and a reception direction signal VD in addition to a usual speech signal. The signals VL, VD are outputted to a display device (transmission means) 7 via signal processing sections 5,6, and the level and the direction of the reception signal are displayed on a display section 7. Thus, the reception power and the reception direction are easily monitored at communication and stable communication is attained. |
