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Patent

Reflector antenna for operation in more than one frequency band

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TLDR
In this article, the concave surface of the antenna reflector body is provided with surface zones arranged in regular arrays or patterns, and the same antenna is capable of handling frequencies in a plurality of different band widths and different apertures.
Abstract
A reflector antenna is constructed for operation in at least two frequency ranges. For this purpose the concave surface of the antenna reflector body, which preferably has a paraboloid configuration, is provided with surface zones arranged in regular arrays or patterns. These surface zones provide antenna or reflector elements which are reflecting or transparent with regard to a particular frequency range or band width, while other surface zones of the antenna reflector surface are transparent or reflecting in another given frequency range or band widths. Thus, depending on the configurations and dimensions of these different surface zones one and the same antenna is capable of handling frequencies in a plurality of different band widths and different apertures.

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Citations
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References
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Journal ArticleDOI

Resonant-grid quasioptical diplexer

TL;DR: In this article, a polarisation independent-resonant-grid diplexer was used to transmit the 13·5 to 19 GHz band (loss < 1 dB) at an angle of 40° to the incident beam.
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Thermal protective shield for antenna reflectors

TL;DR: In this paper, a Kapton substrate with a thin aluminum capacitive grid on the shield's reflector side and a partially reflecting layer (28) of germanium on its sun side was used for thermal protection.
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Method of forming metallic patterns on curved surfaces

TL;DR: In this article, an electrical pattern is formed on the photographic emulsion of a thin membrane that is used as a photo mask, which is then removed and the pattern is provided on the surface by conventional developing and etching techniques to provide a clear, well defined pattern even in arrays wherein the pattern segments are of small dimension.