Antenna reflector having a configured surface with separated focuses for covering identical surface areas and method for ascertaining the configured surface
First Claim
1. A reflector for electromagnetic waves, said reflector comprising a reflector body having a configured reflector surface, said configured reflector surface comprising a plurality of localized surface areas, said reflector further comprising at least one group of spatially separated focuses, each of said localized surface areas having a surface topography with bumps and dents adapted for cooperation with said at least one group of spatially separated focuses for directing electromagnetic beams emanating from said respective group of spatially separated focuses onto a region to be illuminated by said electromagnetic beams or for receiving electromagnetic beams emanating from a respective region, and wherein said bumps and dents of said localized surface areas have progressively smaller dimensions starting from a given first dimension of the bumps and dents of a first localized surface area of said configured reflector surface.
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Abstract
A reflector for reflecting electromagnetic waves has a configured surface for these waves whereby localized deformations or configurations such as bumps (B) and dents (D) of the reflector (1) are so constructed that the reflector cooperates with several focuses (10A, 10B; 110A, 110B) which are spatially separated from the reflector proper. These focuses are so arranged that the electromagnetic beams emanating from the respective radiators (4A, 4B; 40A, 40B) and are directed onto the reflector can be directed through the reflector onto a common region (3A, 3B) to be illuminated, whereby particularly the beams may be tuned to different frequencies or for operation in different frequency bands. Such reflectors are particularly useful in antenna systems for communications such as satellite communications.
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Citations
15 Claims
- 1. A reflector for electromagnetic waves, said reflector comprising a reflector body having a configured reflector surface, said configured reflector surface comprising a plurality of localized surface areas, said reflector further comprising at least one group of spatially separated focuses, each of said localized surface areas having a surface topography with bumps and dents adapted for cooperation with said at least one group of spatially separated focuses for directing electromagnetic beams emanating from said respective group of spatially separated focuses onto a region to be illuminated by said electromagnetic beams or for receiving electromagnetic beams emanating from a respective region, and wherein said bumps and dents of said localized surface areas have progressively smaller dimensions starting from a given first dimension of the bumps and dents of a first localized surface area of said configured reflector surface.
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12. A method for determining a surface configuration for a reflector for electromagnetic waves, said method comprising the following steps:
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(a) simulating a base reflector surface configuration of said reflector, (b) defining spatially separated positions of radiators relative to said base reflector surface configuration in such a way that each radiator illuminates at least one localized reflector surface area of said reflector surface configuration, (c) determining a reflection effect of said reflector surface configuration relative to electromagnetic beams emanating from radiators located in said spatially separated positions defined in step (b), (d) varying a topography in the form of bumps and dents of said at least one localized reflector surface area by making said bumps and dents progressively smaller than any bumps and dents of a preceding topography so that electromagnetic beams emanating from said radiators are directed onto a common region to be illuminated, and (e) repeating steps (c) and (d) with progressively smaller dimensions of said bumps and dents until a defined directional effect of said electromagnetic beams onto said common region to be illuminated is achieved. - View Dependent Claims (13, 14, 15)
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Specification