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Wide-field-of-view antenna arrangement

  • US 4,355,314 A
  • Filed: 11/28/1980
  • Issued: 10/19/1982
  • Est. Priority Date: 11/28/1980
  • Status: Expired due to Term
First Claim
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1. A wide-field-of-view antenna system capable of transmitting or receiving a plurality of beams (14) comprising in combination:

  • a main focusing reflector (10,20) including a reflecting surface, a boresight axis (12) and a paraxial focus (P), said reflector producing a tangential focal region and a sagittal focal region associated with each beam of said plurality of beams;

    a feed arrangement (17,19) disposed to permit the transmitting or receiving of each beam of said plurality of beams along a separate associated predetermined direction (Φ

    ) with respect to said boresight axis over a wide-field-of-view; and

    a subreflector (18,24) including a reflecting surface capable of directing said plurality of beams between said main reflector and said feed arrangement;

    characterized in thatthe subreflector is located in relation to the main reflector such that both the plurality of tangential focal regions and the plurality of sagittal focal regions remain on the same side of said subreflector as the paraxial focus and do not intersect the reflecting surface of said subreflector for any predetermined transmitting or receiving direction.

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