| 摘要 |
PROBLEM TO BE SOLVED: To provide an antenna capable of dealing with an extremely wide frequency band. SOLUTION: A pair of thin single-sided antenna elements 1, 1 are disposed line-symmetrically about one straight line L and further, a pair of planar feeding legs 2, 2 line-symmetrical about the one straight line L and mutually proximate with a fine gap G are formed while being protruded from mutual proximate portions 5, 5 of the antenna elements 1, 1. Moreover, since the shape of each of the legs 2, 2 is expanded outwardly to increase a width dimension W gradually in an outer end direction C, the legs 2, 2 constitute a wideband impedance matching circuit of which the characteristic impedance varies gradually, thereby dealing with a sufficiently wide frequency band and integrating antennas of a plurality of wireless communication systems. COPYRIGHT: (C)2010,JPO&INPIT
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