Low sidelobe offset Gregorian with elliptical aperture
Abstract
Earth station sidelobe specifications have been tightened by the new requirements provided by the U.S. Federal Communications Commission. The dual reflector antenna considered in this paper meets the FCC specifications and has sidelobes far below the design aim in virtually all directions. The utilization of an elliptical aperture makes it possible to obtain lower sidelobes in the plane of the geostationary orbit than found in the case of a circular antenna with equal gain. The antenna operates in the entire range from 10.95 to 14.95 GHz. Attention is given to the Gregorian configuration, the surface accuracy, the reflector profiles, spillover control, the feed system, the measured results for the prototype, and the optimized reflector profiles.
- Publication:
-
4th International Conference on Antennas and Propagation (ICAP 85)
- Pub Date:
- May 1985
- Bibcode:
- 1985anpr.conf..319H
- Keywords:
-
- Antenna Design;
- Antenna Radiation Patterns;
- Geometrical Optics;
- Gregorian Antennas;
- Reflector Antennas;
- Sidelobe Reduction;
- Antenna Feeds;
- Apertures;
- Cassegrain Antennas;
- Ellipses;
- Communications and Radar