Patch radiator with cavity backed slot

H - Electricity – 01 – Q

Patent

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Details

H01Q 1/36 (2006.01) H01Q 1/38 (2006.01) H01Q 3/26 (2006.01) H01Q 21/29 (2006.01)

Patent

CA 2645718

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°.

La présente invention concerne un élément rayonnant à plaque destiné à une utilisation dans des systèmes d'antenne en forme de faisceau ou orientables, qui maximise la limite de fréquence supérieure tout en minimisant la limite de fréquence inférieure, grâce à une configuration de plaque annulaire dans laquelle une région centrale de l'élément de plaque est exempte de matière, ladite région centrale étant d'une forme différente de celle du périmètre extérieur de l'élément de plaque. Une configuration possible d'un élément rayonnant à plaque de ce type comprend une forme extérieure carrée entourant une région centrale circulaire de matière éliminée. Le seuil de limite de fréquence supérieure tend ainsi à augmenter tandis que le périmètre annulaire intérieur est diminué. De préférence, les périmètres extérieur et intérieur n'ont pas d'angles intérieurs de plus de 180°.

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