| 摘要 |
Transmission paths TP01-TP04 respectively correspond to frequency bands FB01-FB04, and respectively transmit transmission signals of the four bands. Reception paths RP01-RP04 respectively correspond to frequency bands FB01-FB04, and respectively transmit reception signals of the four bands. In order to radiate from an antenna 2 a transmission signal that corresponds to one frequency band among the frequency bands FB01-FB04, a Tx switch 6 selects a transmission path that corresponds to the frequency band. In order to extract a reception signal of the frequency band, said reception signal having been captured by the antenna 2, an Rx switch 8 selects a reception path that corresponds to the frequency band. A tunable filter 7 is a filter for variably adjusting the frequency band so as to attenuate reception band noise of the frequency band, said tunable filter being provided between the Tx switch 7 and both of the antenna 2 and the Rx switch 8. |
