Microwave antenna

Details Microwave antenna Microwave antenna

H - Electricity

01

Q

351/26, 351/57

H01Q 21/24 (2006.01) H01Q 13/18 (2006.01) H01Q 21/00 (2006.01) H01Q 21/06 (2006.01)

Patent

CA 1266325

ABSTRACT OF THE DISCLOSURE A planar antenna for circular polarized microwaves incorporates a substrate sandwiched between conductive layers having a plurality of openings arrange in a rectangular array, with a pair of perpendicular excitation probes supported on the substrate in alignment with each opening, and a feed circuit for interconnecting the excitation probes in a predetermined phase relationship. Two additional conductive elements may be supported on the substrate in alignment with the excitation probes to provides improved impedance matching. The feed circuit may incorporate a pair of quarter wavelength feed lines connected to the excitation probes, with a resistance element interconnected between the feed lines. The feed point of the antenna may be located near the center of the array, occupying a position normally occupied by one of the pairs of excitation probes.

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