Patch antenna having tuning means for improved performance
First Claim
1. In a patch antenna comprising a planar conductive patch disposed closely over a ground plane, having shorting means shorting the conductive patch to the ground plane at a central point and feed means attached to the conductive patch at a point between the shorting means and the edge of the patch for conducting electromagnetic energy to or from said conductive patch, the improvement comprising passive matching means for tuning said antenna to improve its performance, said matching means comprising a conductive member extending at least partially between said ground plane and said conductive patch at a point located on the opposite side of said shorting means from said feed means.
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Accused Products
Abstract
A patch antenna employing a matching stub for improved performance. The patch antenna comprises a conductive patch disposed closely over a ground plane, having a shorting pin shorting the conductive patch to the ground plane at a central point and a coaxial feed line attached to the conductive patch at a point between the shorting pin and the edge of the patch for conducting electromagnetic energy to or from the conductive patch. The matching stub comprises a conductive member extending at least partially between the ground plane and the conductive patch at a point located on the opposite side of the shorting pin from the feed line. Performance is further improved by leaving only a small portion of the inner conductor of the coaxial feed line uncovered by the outer conductor.
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Citations
11 Claims
- 1. In a patch antenna comprising a planar conductive patch disposed closely over a ground plane, having shorting means shorting the conductive patch to the ground plane at a central point and feed means attached to the conductive patch at a point between the shorting means and the edge of the patch for conducting electromagnetic energy to or from said conductive patch, the improvement comprising passive matching means for tuning said antenna to improve its performance, said matching means comprising a conductive member extending at least partially between said ground plane and said conductive patch at a point located on the opposite side of said shorting means from said feed means.
Specification