| 摘要 |
A transmission-reception device (10) is provided with an antenna duplexer (12), an antenna (ANT), and first and second transmission-reception circuits (131, 132). A demultiplexer (141) is connected between the first transmission-reception circuit (131) and the antenna duplexer (12), and a multiplexer (142) is connected between the second transmission-reception circuit (132) and the antenna duplexer (12). A signal adjustment unit (15) is connected between the demultiplexer (141) and the multiplexer (142). The amplitude and phase of a tertiary harmonic signal (Srt13) of a first transmission signal (Stｘ1) reflected by the antenna (ANT) are detected, and the signal adjustment unit (15) outputs, on the basis of the detection result, a cancelling signal (Stｘ13c) by adjusting the amplitude and phase of the tertiary harmonic signal (Srt13) demultiplexed by the demultiplexer (141). The multiplexer (142) synthesizes the tertiary harmonic signal (Srt13) reflected by the antenna (ANT) and the cancelling signal (Stｘ13c) to cancel both signals. |
