Satellite TV receiving antenna with gain compensation

The utility model relates to a satellite TV receiving antenna with gain compensation and formed by the connection of a principal reflection parabolic surface and a plurality of complementary fresnel-zone arc reflecting surfaces and the focuses of the reflecting surfaces forming antenna reflector are...

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1. Verfasser: ZHENDE LI
Format: Patent
Sprache:eng
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Zusammenfassung:The utility model relates to a satellite TV receiving antenna with gain compensation and formed by the connection of a principal reflection parabolic surface and a plurality of complementary fresnel-zone arc reflecting surfaces and the focuses of the reflecting surfaces forming antenna reflector are all superimposed at the same point. The main reflecting surface near the focus axis is a large parabolic surface (1) and all the other fresnel-zone arcs (2), (3), (4), etc, that are far from the focus axis are respectively parts of parabolic surfaces with various focal distances. The difference between the focal distance of the main reflecting parabolic surface and the focal distance of each fresnel-zone arc parabolic surface is whole number times of the working wavelength, and the surround of the plane of the reflector forms a stereo fold edge (5) with an outer-loop structure. The utility model can be waist-shaped, diamond-shaped, rectangle and even elliptical, etc and can be produced using metal plates with national standard sizes. The utility model which is convenient in installation, transportation and calibration has the advantages of light weight, a high receiving efficiency and a low cost, beneficial to populate and generalize satellite TV receiving technology.