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Compact low sidelobe antenna and feed network

  • US 9,246,233 B2
  • Filed: 02/28/2014
  • Issued: 01/26/2016
  • Est. Priority Date: 03/01/2013
  • Status: Active Grant
First Claim
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1. An antenna comprising:

  • a primary reflector having a ring focus;

    a feed body along an axis of the primary reflector, the feed body including a circular waveguide coaxial with the axis of the primary reflector;

    a sub-reflector disposed facing an end of the circular waveguide;

    a generally cylindrical stem extending from a center of the sub-reflector into the circular waveguide to form a section of annular waveguide; and

    a sub-reflector support that mechanically connects a perimeter of the sub-reflector and an outside surface of the feed body,wherein the sub-reflector, the stem, and the feed body are collectively configured to couple microwave energy between the annular waveguide and the primary reflector.

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