| 摘要 |
<P>PROBLEM TO BE SOLVED: To prevent breakage of an output amplifier of a transmitter for retransmission due to a reflected wave signal. <P>SOLUTION: An output amplifier 18 amplifies a signal for retransmission, and the amplified signal is transmitted from a transmission antenna 12. A detection control circuit 30 detects a level of a reflected wave signal extracted from a circulator 20 provided between the output amplifier 18 and the transmission antenna 12 and stops an operation of the output amplifier when the detected level is a predetermined reference level or higher. <P>COPYRIGHT: (C)2013,JPO&INPIT |
