| 摘要 |
PROBLEM TO BE SOLVED: To improve versatility, convenience and the like by enabling antennas to be easily switched in accordance with the kind of an antenna to be connected. SOLUTION: First and second switchers 12 and 13 selectively switch whether a reception unit 9 receives a signal from a first antenna 3a through a third port 11c of a circulator 11, or a signal from a second antenna 3b. COPYRIGHT: (C)2007,JPO&INPIT
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