Multi-beam antenna system with shaped reflector for generating flat beams
First Claim
1. A side-fed dual reflector antenna system comprising:
- a feed array including separate feeds for generating separate respective antenna beams;
a subreflector for reflecting the separate respective antenna beams generated by the separate feeds of the feed array; and
a reflector having a shaped reflection surface for reflecting the separate respective antenna beams received from the subreflector toward a terrestrial target in a manner that produces substantially contiguous flat beams, each of which provides substantially uniform coverage within a predetermined coverage area on the terrestrial target;
the subreflector and each of the separate feeds in the feed array being arranged so that a center of each of the separate respective antenna beams illuminates a center of the reflector subsequent to being reflected from the subreflector.
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Accused Products
Abstract
A side-fed dual reflector antenna system (10) of the present invention overcomes the size cost and complexity limitations associated with conventional single and multiple reflector antenna systems. The antenna system (10) includes a feed array (18) including separate feeds for generating separate respective antenna beams, a subreflector (20) for reflecting the separate respective antenna beams generated by the separate feeds of the feed array (18), and a reflector (22) having a shaped reflecting surface for reflecting the separate respective antenna beams received from the subreflector (20) toward a terrestrial target (16) to produce substantially contiguous flat beams, each of which provides substantially uniform coverage within a predetermined coverage area on the terrestrial target. The subreflector (20) and each of the separate feeds in the feed array (18) are arranged so that a center of each of the separate respective antenna beams illuminates a center of the reflector (22) subsequent to being reflected from the subreflector (20).
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Citations
16 Claims
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1. A side-fed dual reflector antenna system comprising:
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a feed array including separate feeds for generating separate respective antenna beams;
a subreflector for reflecting the separate respective antenna beams generated by the separate feeds of the feed array; and
a reflector having a shaped reflection surface for reflecting the separate respective antenna beams received from the subreflector toward a terrestrial target in a manner that produces substantially contiguous flat beams, each of which provides substantially uniform coverage within a predetermined coverage area on the terrestrial target;
the subreflector and each of the separate feeds in the feed array being arranged so that a center of each of the separate respective antenna beams illuminates a center of the reflector subsequent to being reflected from the subreflector. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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11. A single offset reflector antenna system comprising:
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a feed array including separate feeds for generating separate respective antenna beams;
a reflector having a shaped reflection surface for receiving the separate respective antenna beams from the feed array and for reflecting the separate respective antenna beams toward a terrestrial target in a manner that produces contiguous flat beams, each of which defines a coverage cell within a predetermined coverage area on the terrestrial target;
each of the separate feeds in the feed array being arranged so that a center of each of the separate respective antenna beams illuminates a center of the reflector. - View Dependent Claims (12, 13, 14, 15, 16)
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Specification