| 摘要 |
PROBLEM TO BE SOLVED: To provide a patch antenna having sophisticated beam width characteristics. SOLUTION: As a first example, this antenna is provided with a patch element and a ground plane separated from the patch element by a first dielectric layer. Further, this antenna has a signal feeder separated from the ground plane by a second dielectric layer and the signal feeder is shielded from the patch element by the ground plane. The signal feeder is electromagnetically coupled with the patch element through an aperture placed on the ground plane across this signal feeder and the ground plane functions as a limited plane to the aperture. Further, as another style, the beam width of the antenna is controlled by controlling the position of a reflecting plate at the back of the signal feeder. Thus, the method is effective for various wireless systems in three-sector configuration with controllable wide beam width.
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