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US 4,792,810 AGranted
Microwave antenna
AssigneeSony Corporation
InventorsKeiji Fukuzawa, Fumihiro Ito, Shinobu Tsurumaru
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AssigneeSony Corporation
InventorsKeiji Fukuzawa, Fumihiro Ito, Shinobu Tsurumaru
Estimating the term…
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.
A suspended line feed type planar antenna having a substrate sandwiched between a pair of conductive surfaces, each of said surfaces having a plurality of spaced openings defining radiation elements, a plurality of said openings having a pair of excitation probes formed perpendicularly to each other in a common plane, on said substrate, in alignment with said openings, and means for connecting signals received at said pair of excitation probes to a suspended line in phase with each other.
A suspended line feed type planar antenna having a substrte sandwiched between a pair of conductive surfaces, each of said surfaces having a plurality of spaced openings defining radiation elements, a plurality of said openings having a pair of excitation probes formed perpendicularly to each other in a common plane, on said substrate, in alignment with openings, means for connecting signals received at said pair of excitation probes to a suspended line in phase with each other, and a plurality of conductive segments aligned and spaced from said excitation probes in alignment with said openings.
A suspended line feed type planar antenna comprising a substrate sandwiched between a pair of conductive surfaces, one of said surfaces having a rectangular array of spaced openings defining radiation elements, a corresponding rectangular array of radiators formed on said substrate in alignment with said openings, top and bottom plates on which said conductive surfaces are deposited, and feed means connected to said radiators, said feed means comprising a conductor adapted to be connected externally of said antenna, said feed means be centrally located in said rectangular array of radiators.
Dependencies are inferred from the claim text.