Large-scale high-accuracy parabolic offset antenna

Abstract

The invention discloses a large-scale high-accuracy parabolic offset antenna which comprises an antenna body (1), a feed source array bracket (2), feed source arrays (3), a rotary table (4) and a counter weight device (5). The antenna body (1) is arranged at one end of the feed source array bracket (2); the other end of the feed source array bracket (2) is provided with at least one transition bracket mounting surface; the feed source arrays (3) are respectively arranged at the top ends of transition brackets (6); the rotary table (4) is arranged at the bottom of the feed source array bracket (2); and the counter weight device (5) is connected at the end of the feed source array bracket (2), which is close to the feed source arrays (3). According to the invention, a profile attachment technology is adopted and the manufacturing cost is reduced; a profile is riveted and cured and the problems of complex structure and control for the integral weight of a large-scale antenna are solved; a reflector skeleton adopts a truss structure, the feed source array bracket adopts a truss and thin shell beam mixed structure, and the structure design under a heavy load and under the complex boundary conditions of low weight, high stiffness requirement and the like is implemented.

Description

technical field [0001] The invention relates to a large-scale high-precision paraboloid bias feed antenna. Background technique [0002] The offset antenna is relative to the positive feed antenna, which means that the installation position of the feed source and the tuner of the offset antenna is not on a straight line perpendicular to the central section of the antenna and passing through the center of the antenna. The feed source of the forward-fed parabolic antenna is located in the main beam of the antenna, thus blocking the received electric wave, reducing the gain of the antenna and increasing the side lobe. Moving the feed source out of the aperture of the antenna reflector can eliminate the shielding of the feed source and its support for electromagnetic waves. Therefore, there is no effect of the so-called feed shadow. Under the premise of the same antenna area, processing accuracy, and receiving frequency, the gain of the offset antenna is greater than that of th...

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to solve the deficiencies of the prior art, to provide a surface bonding technology, which greatly reduces the manufacturing cost on the premise of ensuring the accuracy of the surface, real-time monitoring and adjustment during the manufacturing process, and avoids dismantling the antenna every time. Lightweight and strong large-scale high-precision parabolic bias-fed antenna for tedious and complicated fine-tuning problems to achieve precision after installation

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