Array fed reflector antenna for transmitting & receiving multiple beams
First Claim
1. An antenna comprising:
- a reflector having a portion with a dual parabolic shape, wherein said portion of said reflector has a horizontal focal length and a vertical focal length which is less than the horizontal focal length; and
a distributed feed array for transmitting and receiving a plurality of electromagnetic energy beams, and distributed feed array positioned adjacent to and offset from, said reflector, so that said reflector reflects the transmitted and received electromagnetic energy beams, said distributed feed array having a curved surface including a plurality of rows of radiating elements.
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Accused Products
Abstract
An array fed reflector antenna includes a reflector and a distributed feed array. The reflector has a portion with a dual parabolic shape. The distributed feed array transmits and receives a plurality of electromagnetic energy beams simultaneously, and is positioned adjacent the reflector so that the reflector reflects the transmitted and received electromagnetic energy beams. The distributed feed array is offset from the reflector so that a plane wave formed by the transmitted electromagnetic energy beams reflected by the reflector will not substantially impinge the distributed feed array. The antenna also has a beam switching network which is a hybrid network for selectively actuating separate but overlapping portions of the distributed feed array to produce two transmit elevation beams.
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Citations
6 Claims
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1. An antenna comprising:
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a reflector having a portion with a dual parabolic shape, wherein said portion of said reflector has a horizontal focal length and a vertical focal length which is less than the horizontal focal length; and a distributed feed array for transmitting and receiving a plurality of electromagnetic energy beams, and distributed feed array positioned adjacent to and offset from, said reflector, so that said reflector reflects the transmitted and received electromagnetic energy beams, said distributed feed array having a curved surface including a plurality of rows of radiating elements. - View Dependent Claims (2, 3, 4, 5, 6)
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Specification