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Patent

Dual gridded reflector antenna

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TLDR
An improved dual-gridded reflector antenna configuration which allows cross-polarization radiation to be scanned in any given direction was proposed in this paper. But the design of the antenna was not discussed.
Abstract
An improved dual gridded reflector antenna configuration which allows cross-polarization radiation to be scanned in any given direction. The dual-gridded reflector assembly includes a front parabolic reflector illuminated by a first source, and a second parabolic reflector illuminated by a second source. The second reflector is positioned adjacent to and behind the front reflector such that the center points of the reflectors align to define a center axis. Additionally, the first and second sources are positioned at different offsets with respect to the reflectors and have a respective rotated offset angle with respect to the center axis such that the sources define an antenna feed separation. By modifying the offsets and the rotated offset angles, the feed separation can be designed to have an inclination with respect to the north-south or east-west feed separation direction.

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Citations
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References
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Double grid reflector antenna

TL;DR: A double grid reflector antenna for radiating different signals having pure linear orthogonal polarization comprises a couple of identical and superposed reflecting grids, and feeds are set in the focal plane of the respective grids.
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TL;DR: In this paper, a dual-gridded shaped reflectors (10) and (20) are arranged one behind the other for transmitting and receiving orthogonally polarized energy waves.
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TL;DR: In this article, a dual gridded antenna reflector system and method for constructing the same is disclosed, which comprises a pair of reflector dishes each having a grid of parallel conductors.
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TL;DR: In this paper, two reflecting surfaces pass through each other at an intersection line (450) lying in a plane of symmetry, and the surfaces share a common aperture (101) and the surface contours of the two surfaces are preferably mirror images of each other and are arranged such that the respective two foci (110, 120) of the reflecting surfaces are equidistant from the center of the shared aperture and offset from each other in equal and opposite directions (109a, 109b) from the plane.