Patch radiator with cavity backed slot
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United States of America Patent
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Dec 13, 2011
Grant Date -
Apr 9, 2009
app pub date -
Mar 9, 2007
filing date -
Mar 17, 2006
priority date (Note) -
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status (Latency Note)
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Abstract
A patch radiator for use in beamformed or steerable antenna systems which maximizes upper frequency limit and simultaneously minimizes the lower frequency limit, by providing an annular patch configuration in which a central region of the patch element is devoid of material, whereby this central region is of a different shape from the shape of the exterior perimeter of the patch element. One possible configuration of such a patch radiator comprises a square exterior shape, enclosing a central circular region of removed material. In this manner, the upper frequency limit threshold tends to rise as the interior annular perimeter is reduced. Preferably, the exterior and interior perimeters have no interior angles of more than 180°.
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