Patch radiator with cavity backed slot

Details Patch radiator with cavity backed slot Patch radiator with cavity backed slot

2007-03-09

2011-12-13

Phan, Tho G (Department: 2821)

Communications: radio wave antennas

Antennas

Microstrip

Reexamination Certificate

active

08077093

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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