Patent · US Expired

Reflector antenna, especially for a communications satellite

US5684494A · kind A · utility

57Cited by

11References

10Claims

0Family size

Assignee

Daimler-Benz Aerospace AG · DE

Inventors

Norbert Nathrath · Taufkirchen, DE
Helmut Wolf · Holzkirchen, DE
Ludwig Haas · Putzbrunn, DE
Manfred Lieke · Ebersberg, DE
Detlev Blaschke · Unterhaching, DE

Key dates

Filing date	Dec 15, 1995
Grant date	Nov 4, 1997
Priority date	—
Expiry date	Dec 15, 2015

Classification

Technology area (CPC H)Electricity
CPC primaryH01Q15/24
WIPO fieldTelecommunications
WIPO sectorElectrical engineering

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.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.