| 摘要 |
PROBLEM TO BE SOLVED: To provide a multifrequency antenna which can transmit and receive signals of a plurality of frequencies and has simple constitution as one antenna system which has a plurality of antenna elements stored in one housing. SOLUTION: A 2.4 GHz-band antenna element 20 and a 5.2 GHz-band antenna element 22 are included. One port 26a of a filter 26 which passes a signal of the 2.4 GHz band, but blocks a signal of the 5.2 GHz band is connected to the antenna element 20. One port 28a of a filter 28 which passes the signal of the 5.2 GHz band, but blocks the signal of the 2.4 GHz band is connected to the antenna element 22. A matching part 30 is provided between other-side ports 26b and 28b of the filters 26 and 28 and an external connection terminal 32. The filters 26 and 28 and a matching part 30 are formed on one substrate 17. COPYRIGHT: (C)2004,JPO
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