Communications: radio wave antennas – Antennas – Wave guide type
Patent
1995-12-15
1997-11-04
Le, Hoanganh T.
Communications: radio wave antennas
Antennas
Wave guide type
343761, 343781CA, 343786, 343840, H01Q 1300
Patent
active
056844948
ABSTRACT:
The invention provides a reflector antenna, especially for a communications satellite, having at least one fixed main reflector (102) with an essentially circular aperture. A fixed feed system (118) includes a horn radiator (108) with a rotationally symmetric radiation diagram and a fixed polarization direction. An auxiliary reflector may be arranged to be rotationally positionable around a main axis (E) and has a reflecting surface that is shaped as a partial surface of a nonrotationally symmetric ellipsoid with a low numerical eccentricity, which illuminates main reflector (102) elliptically with an ellipticity that is essentially constant regardless of the rotational position.
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patent: 5198827 (1993-03-01), Seaton
Blaschke Detlev
Haas Ludwig
Lieke Manfred
Nathrath Norbert
Wolf Helmut
Daimler-Benz Aerospace AG
Ho Tan
Le Hoanganh T.
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