| 摘要 |
The invention provides a composite high-frequency part (10) decreased in the number of switching elements, usable in information terminal devices, compacted, reduced in power consumption and simplified in circuit, the composite high-frequency part (10) being adapted for transmitting and receiving a first signal and a second signal which are different infrequency band, the part comprising an antenna (12); a receiving unit (20) comprising a first receiving port Rx1 for receiving the first signal, a second receiving port Rx2 for receiving the second signal, and a diplexer (22) connected to the receiving ports for sorting signals into the first signal and the second signal; a transmitting unit (30) comprising a first transmitting port Tx1 for transmitting the first signal, a second transmitting port Tx2 for transmitting the second signal, and a diplexer (32) connected to the transmitting ports for combining the first signal and the second signal; and a switch (16) switchable so as to connect the diplexer of one of the transmitting unit (30) and the receiving unit (20) selectively to the antenna (12).
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