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US 6,603,437 B2Granted
High efficiency low sidelobe dual reflector antenna
AssigneeRaytheon Company
InventorYueh-Chi Chang
Life of this patent
Estimating the term…
Abstract
A dual reflector antenna system includes a subreflector and a main reflector with optimized shapes defined from a desired field distribution pattern and a feed pattern. The reflector shapes capture maximum energy from the feed and allow sidelobes to closely track a predetermined sidelobe envelope for optimal overall antenna efficiency.
Claims16
A method for shaping reflectors, comprising:
- selecting a desired analytical aperture field distribution and a feed pattern from a feed;
- defining parameters of the main and sub reflectors;
- mapping energy from the feed pattern to the aperture field distribution;
- incrementally defining surface normals for each point of the main and sub reflectors;
- determining the shape of the main and sub reflectors to provide an aperture field distribution that generates optimal sidelobes under a predetermined sidelobe envelope for maximizing aperture illumination efficiency.
2 more elements
An article of manufacture having main and subreflectors fabricated by the steps of:
- selecting a desired analytical aperture field distribution and a feed pattern from a feed;
- defining parameters of the main and sub reflectors;
- mapping energy from the feed pattern to the aperture field distribution;
- incrementally defining surface normals for each point of the main and sub reflectors;
- and
- determining the shape of the main and sub reflectors to provide an aperture field distribution that generates optimal sidelobes under a predetermined sidelobe envelope for maximizing aperture illumination efficiency.
3 more elements
Dependencies are inferred from the claim text.