The shadow is a dead spot directly in front of the feedhorn. Normally the feed horn constitutes an obstruction for the rays coming from the reflector at a parabolic antenna. To solve this problem the ...
Two offset parabolic mirrors couple the radiation from the f/D = 5.7 antenna into the receiver feedhorn. A Fabry-Perot resonator operating at oblique incidence is used to inject the local oscillator ...
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