Trans-track inter-satellite antenna based on switching and capturing and tracking method thereof

Abstract

The invention discloses a trans-track inter-satellite antenna based on switching and a capturing and tracking method of the trans-track inter-satellite antenna based on switching. The trans-track inter-satellite antenna based on switching comprises a microwave switching assembly and an antenna array, wherein the antenna array is composed of N narrow beam antenna array elements, the microwave switching assembly is provided with an equipment coupling port P1, an equipment coupling port P2 and N antenna coupling ports, the equipment coupling port P1 is connected with a satellite-borne transmitter and a satellite-borne receiver through duplexers, the equipment coupling port P2 is connected with a signal detector, each narrow beam antenna array element is connected with the corresponding antenna coupling port, radio frequency channels can be formed between each equipment coupling port and all the antenna coupling ports respectively, the electric axes of all the narrow beam antenna array elements point to different directions, so that a radial pattern is formed in the space, and the wave beam coverage areas of every two adjacent narrow beam antenna array elements overlap, so that the whole antenna array meets the requirement for the wave beam coverage area when the positions of satellites on tracks change relatively.

Description

technical field [0001] The invention relates to an inter-satellite antenna design and capture and tracking process of off-orbit satellites. Background technique [0002] When the satellite formation or satellite constellation completes space networking tasks, it often involves the construction of inter-satellite links between satellites in different orbits. There is high-speed relative motion of off-orbit satellites. When building an inter-satellite link, the inter-satellite antenna needs to be able to adjust the antenna pointing in real time according to the relative position of the satellite. The adjustment speed of the pointing must meet the needs of the relative motion of the satellite. The adjustment of antenna pointing is divided into two phases: the initial acquisition phase and the tracking phase. In the initial acquisition stage, the inter-satellite antenna needs to detect the incident signal in a large space range, and preliminarily determine the incident directi...

AI Technical Summary

Problems solved by technology

Limited by the mechanical inertia, the capture and tracking speed of the mechanical servo drive mechanism is relatively slow

In the initial acquisition stage, the mechanical servo mechanism cannot search for the incident signal in a large range. It must calculate the target pointing position based on the satellite orbit, and roughly point the antenna to the target direction, and search in a small range in the target direction; stage, the rotation speed of the servo mechanism is relatively slow, which cannot meet the needs of building an inter-satellite link between high-speed relative motion satellites

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