EP0186496A2
Expired / Lapsed
EP
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Antenna system for circularly polarized waves
Assignee: Sharp Corp
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Filing: 1985-12-23
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Granted: —
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Expires: 2005-12-23
Abstract
Abstract An antenna system comprises a reflector which is a part of a paraboloid of revolution or parabolic cylinder, a primary radiator for clockwise circulatory polarized wave, and a primary radiator for counterclockwise circularly polarized wave. The reflector is of geometrically asymmetrical shape to effect different reflection properties for clockwise and counterclockwise circular polarizations. The primary radiators are fixed at two different positions in the vicinity of the focus of the paraboloid reflector.
Inventors
- 👤 Tomozo Ohta
- 👤 Kazutada Higashi
- 👤 Hirohiko Yamamoto
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-11-02 08:31
CPC Classifications
H; H01; H01Q; H01Q25/00; H01Q25/001; H01Q19/00; H01Q19/10; H01Q19/12; H01Q19/13; H01Q19/132
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
79 words
An antenna system comprising; a reflector being a part of a paraboloid of revolution or parabolic cylinder; a primary radiator for clockwise circularly polarized wave; and a primary radiator for counterclockwise circularly polarized wave; said reflector being of geometrically asymmetrical shape to effect different reflection properties for clockwise and counterclockwise circular polarizations; said primary radiators for clockwise and counterclockwise circularly polarized waves being fixed at two different positions in the vicinity of the focus of said paraboloid re- flector.
Claim 2
Dependent Claim
79 words
An antenna system comprising; a reflector being a part of a paraboloid of revolution or parabolic cylinder; a primary radiator for clockwise circularly polarized wave; and a primary radiator for counterclockwise circularly polarized wave; said reflector being of geometrically asymmetrical shape to effect different reflection properties for clockwise and counterclockwise circular polarizations; said primary radiators for clockwise and counterclockwise circularly polarized waves being fixed at two different positions in the vicinity of the focus of said paraboloid re- flector.
Claim 3
Dependent Claim
28 words
The antenna system as claimed in claim 1, in which said reflector reflects clockwise and counterclockwise circularly polarized waves radiated from said respective primary radiators into different directions.
Claim 4
Dependent Claim
96 words
An antenna system comprising: a reflector being a part of a paraboloid of revolution or parabolic cylinder; a primary radiator for clockwise circularly polarized wave; and a primary radiator for counterclockwise circularly polarized wave; said reflector being of geometrically asymmetrical shape to effect different reflection properties for clockwise and counterclockwise circular polarizations; said primary radiators for clockwise and counterclockwise circularly polarized waves being fixed at two different positions in the vicinity of the focus of said paraboloid reflector; said reflector reflecting clockwise and counterclockwise circularly polarized waves radiated from said respective primary radiators into different directions.
Claim 5
Dependent Claim
96 words
An antenna system comprising: a reflector being a part of a paraboloid of revolution or parabolic cylinder; a primary radiator for clockwise circularly polarized wave; and a primary radiator for counterclockwise circularly polarized wave; said reflector being of geometrically asymmetrical shape to effect different reflection properties for clockwise and counterclockwise circular polarizations; said primary radiators for clockwise and counterclockwise circularly polarized waves being fixed at two different positions in the vicinity of the focus of said paraboloid reflector; said reflector reflecting clockwise and counterclockwise circularly polarized waves radiated from said respective primary radiators into different directions.
Claim 6
Dependent Claim
35 words
The antenna system as claimed in claim 3, in which clockwise and counterclockwise circularly polarized wave signals coming from different directions are received by said primary radiators for clockwise and counterclockwise circularly polarized waves, respectively.
Claim 7
Dependent Claim
93 words
An antenna system comprising: a reflector being a part of a paraboloid of revolution or parabolic cylinder and being of geometrically asymmetrical shape to effect different reflection properties for clockwise and counterclockwise circular polarizations; a primary radiator for clockwise circularly polarized wave; and a primary radiator for counterclockwise circularly polarized wave; said primary radiators for clockwise and counterclockwise circularly polarized waves being fixed at two different positions in the vicinity of the focus of said paraboloid reflector, to compensate for the principal beam shift for each of clockwise and counterclockwise circularly polarized waves.
Claim 8
Dependent Claim
93 words
An antenna system comprising: a reflector being a part of a paraboloid of revolution or parabolic cylinder and being of geometrically asymmetrical shape to effect different reflection properties for clockwise and counterclockwise circular polarizations; a primary radiator for clockwise circularly polarized wave; and a primary radiator for counterclockwise circularly polarized wave; said primary radiators for clockwise and counterclockwise circularly polarized waves being fixed at two different positions in the vicinity of the focus of said paraboloid reflector, to compensate for the principal beam shift for each of clockwise and counterclockwise circularly polarized waves.
Claim 9
Dependent Claim
42 words
The antenna system as claimed in claim 4, in which clockwise and counterclockwise circularly polarized wave signals coming to said reflector from the same direction are received simultaneously or individually by said respective primary radiators for clockwise and counterclockwise circularly polarized waves.
Claim 10
Dependent Claim
35 words
The antenna system as claimed in claim 4, in which said reflector reflects clockwise and counterclockwise circularly polarized waves radiated simultaneously or individually from said respective primary radiators to transmit them in the same direction.
References Cited (Backward Citations)
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