Microwave antenna

Details Microwave antenna Microwave antenna

1986-07-22

1988-12-20

Sikes, William L.

Communications: radio wave antennas

Antennas

Wave guide type

343700MS, H01Q 138, H01Q 1308

Patent

active

047928107

ABSTRACT:
A planar antenna for circular polarized microwaves incorporates a substrate sandwiched between conductive layers having a plurality of openings arranged 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 provide 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.

REFERENCES:
patent: 4208660 (1980-06-01), McOwen, Jr.
patent: 4527165 (1985-07-01), de Ronde
patent: 4543579 (1985-09-01), Teshirogi
patent: 4614947 (1986-09-01), Rammos
patent: 4626865 (1986-12-01), Rammos
patent: 4644362 (1987-02-01), Rammos

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