Receiving antenna for multibeam coverage
AssigneeAlcatel
InventorRegis Lenormand
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Abstract
The invention relates to a receiving antenna for satellite telecommunications. More specifically, the invention relates to an active antenna comprising a network of elementary sources which is positioned at the focal point of a focusing reflector. According to the invention, said network of sources is disposed on a more or less spherical, concave surface S. The aforementioned arrangement can be used to: (i) improve the efficiency of the optics and (ii) enable the use of polarisation duplexers behind surface S in order to increase the spectral efficiency of the antenna.
Claims14
Receiving antenna for multispot coverage, comprising at least one focusing reflector (34, 44, 100) and one focal array (30, 110) of individual sources (31) disposed in the focal area of said focusing reflector (34, 44, 100), characterized in that said sources (31) are substantially contiguous and disposed on a concave and approximately spherical surface (S);
- and wherein the at least one focusing reflector is concave and faces the one focal array.
A receiving antenna, comprising
- a concave focusing reflector, and
- a focal array comprising individual sources disposed in the focal area of the focusing reflector,
- wherein the sources are substantially contiguous and disposed on a concave surface;
- and the focusing reflector generally faces the focal array, and
- wherein the sources are disposed on a spherical or approximately spherical surface.
Dependencies are inferred from the claim text.