| 摘要 |
A composite antenna of the present invention has conductor ground plate 12 having a preset shape, a plurality of antenna elements 16 faced to each other and separated from conductor ground plate 12 by predetermined element interval 220 , and feeding terminals 15 for feeding power to antenna elements 16 via transmission lines in the same phase. Antenna elements 16 and feeding terminals 15 are disposed symmetrically with respect to the center of conductor ground plate 12 . Even when the number of operating frequencies is increased to three or more, the composite antenna is thin and small and can provide a predetermined directional characteristic.
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