A central hub coaxially connected with a waveguide feed source and its application

Abstract

The invention belongs to the technical field of space-borne antennas, and discloses a central wheel hub coaxially connected with a waveguide feed source and its application. The upper end of the hub base is fixed with a central boss, and the center boss and the feed horn pass through the feed hole with set screws. The hub base is connected with the expandable antenna. The feed hole is coaxially connected with the feed horn through a set screw, the set screw is screwed into the bolt hole, and the bolt hole is located on the lower end surface of the feed horn. In the present invention, anti-collision arcs are set on the front of the cylindrical boss of the outer ring to avoid the collision between the upper pressure plate and the center hub base; the feed source hole is fixedly connected with the feed source horn through a set screw, and the relationship of the coaxial center is ensured, reducing the feed source horn Horizontal shaking: the invention fixes the feed horn of the umbrella antenna and the center hub bottom coaxially to reduce the horizontal shake of the feed horn, avoid the collision between the upper platen and the center hub base, and avoid the circumferential rotation when the auxiliary reflective surface is unfolded , which is beneficial to the mass distribution of the center hub and waveguide feed.

Description

technical field [0001] The invention belongs to the technical field of space-borne antennas, and in particular relates to a central hub coaxially connected with a waveguide feed source and its application. Background technique [0002] At present, with the rapid development of aerospace technology, spaceborne deployable antennas play an increasingly important role. Umbrella-shaped deployable antennas are more effective in terms of storage ratio, surface density, deployment performance, and shape and surface maintenance in orbital thermal environments. , has outstanding advantages, and has received high attention and extensive research from many international aerospace research institutions. The central hub that can be coaxially connected with the waveguide feed is the key device connecting the feed horn and the antenna structure. It is the premise that the umbrella antenna can accurately transmit and receive signals. Its reliability determines the success or failure of the a...

AI Technical Summary

Problems solved by technology

[0006] Aiming at the problems existing in the prior art, the present invention provides a central hub coaxially connected with the waveguide feed source and its application. The present invention solves the problem of the horizontal shaking of the current antenna feed horn and the circumferential rotation of the sub-reflector. The quality of the feed waveguide is large, the mass distribution between the center hub and the waveguide feed is uneven, and the upper platen and the base of the center hub have collision problems

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