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US 4,231,043 AGranted
Technique for reducing near-in sidelobes of an offset antenna
AssigneeBell Telephone Laboratories, Incorporated
InventorRalph A. Semplak
Life of this patent
Estimating the term…
Abstract
The present invention relates to technique for reducing near-in sidelobes of an offset antenna. The method comprises positioning at least one piece of microwave absorbing material on a sector of the edge of the reflecting surface of the offset main reflector closest to the focal point of the antenna. The material is positioned on the portion of the edge of the reflecting surface nearest the focal point of the main reflector in such a manner as to achieve substantial selective reduction of the near-in sidelobes generated by the antenna.
Claims5
An antenna comprising:
- an offset main reflector (20) including a reflecting surface and a focal point associated therewith;
- and
- absorbing material means (24, 32 in FIG. 1;
- 40 in FIG. 3;
- 41, 60 in FIG. 5;
- 70, 80 in FIG. 7) disposed on the reflecting surface of the main reflector capable of reducing sidelobes
- CHARACTERIZED IN THAT
- the means capable of reducing sidelobes comprises at least one piece of absorbing material disposed only on an edge portion of a sector of the reflecting surface of the main reflector closest to the focal point of said reflector.
5 more elements
Dependencies are inferred from the claim text.