Compact low sidelobe antenna and feed network
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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Abstract
An antenna may include 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; and a generally cylindrical stem extending from a center of the sub-reflector into the circular waveguide to form a section of annular waveguide. A sub-reflector support may mechanically connect a perimeter of the sub-reflector and an outside surface of the feed body. The sub-reflector, the stem, and the feed body may be collectively configured to couple microwave energy between the annular waveguide and the primary reflector.
18 Citations
11 Claims
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1. An antenna comprising:
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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. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11)
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Specification