Extendable tower-shaped satellite antenna framework structure

Abstract

The invention discloses an extendable tower-shaped satellite antenna framework structure. The tower-shaped satellite antenna framework structure is an integrated mesh tower-shaped structure, meshes form the upper bottom of the tower-shaped structure and the framework of each side surface, and the mesh wires of the meshes are composed of two kinds of memory alloy wires with different specifications. The extendable tower-shaped satellite antenna framework structure has the following advantages: 1. the use of a memory alloy wire technology can reduce the quality of the complexity of the actuating mechanism extended by a satellite antenna and improve the extension reliability; 2. the antenna extension mechanism provided by the invention can be integrated with other special extension mechanisms for design so that the structure weight can be saved and the efficiency can be enhanced; 3. by adjusting the positions and the shape of the meshes, the first-order inherent frequency of the tower-shaped satellite antenna framework structure can be adjusted; and 4. a tower-shaped satellite antenna framework, made of metal materials, can be used as an antenna. The tower-shaped satellite antenna framework has a big caliber so that the problem of inadequate gain of a conventional antenna can be overcome, the gain of the tower-shaped antenna is enhanced, and the ground communication capability is also improved.

Description

technical field [0001] The invention relates to a satellite antenna structure, in particular to a deployable satellite antenna structure. Background technique [0002] There are many structural forms of satellite antennas, such as wire antennas, horn antennas, reflector antennas, and array antennas. From the perspective of structure and mechanism, reflector antennas and array antennas are generally larger in size, more complex in structure, and have higher size requirements. The large-scale unfolded antenna is generally a flexible reflector antenna, and its diameter generally exceeds 4.2m, and even reaches 150m. Most of the flexible reflective surfaces use flexible metal meshes, and various forms of deployment mechanisms are required to deploy them, so they are also called mesh deployable antennas. Since the 1970s, countries have successively developed various types of mesh deployable reflector antennas, which can be summarized as follows: radial rib antennas, wound rib an...

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Problems solved by technology

[0006] The technical problem to be solved by the present invention is: to construct a memory alloy skeleton structure of an expandable tower-shaped satellite antenna, to overcome the complex problems of the structure and mechanism of the existing satellite antenna, and to improve the reliability of the satellite antenna; The problem of antenna stiffness makes the first-order natural frequency of the antenna structure avoid the first-order natural frequency of the satellite and each subsystem; overcomes the problem of insufficient gain of the existing antenna, enhances the gain of the tower antenna, and improves the ground communication capability

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