Patent
Antenna reflector having a configured surface with separated focuses for covering identical surface areas and method for ascertaining the configured surface
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TLDR
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 reflectors cooperates with several focuses (10 A, 10 B; 110 A, 110 B) which are spatially separated from the reflecter proper as discussed by the authors.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 ( 10 A, 10 B; 110 A, 110 B) which are spatially separated from the reflector proper. These focuses are so arranged that the electromagnetic beams emanating from the respective radiators ( 4 A, 4 B; 40 A, 40 B) and are directed onto the reflector can be directed through the reflector onto a common region ( 3 A, 3 B) 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.read more
Citations
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References
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Patent
Offset-fed multi-beam tracking antenna system utilizing especially shaped reflector surfaces
TL;DR: In this article, a reflector antenna system suitable for ground stations used in communication with geostationary satellites is described, and a novel method for shaping subreflectors using the ratios of ray lengths squared and variable focal lengths is applied in the optimally tilted offset geometry results in almost uniform aperture power distributions.
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TL;DR: In this paper, a main reflector or a subreflector reflecting surface is segmented to provide separate images of the far field area of the antenna on separate focal surfaces in the vicinity of an original focal surface of a corresponding non-segmented antenna.