Large-aperture vehicle-mounted deployable composite material antenna

Abstract

The invention discloses a large-caliber vehicle-mounted deployable composite material antenna, which comprises a mounting tray, a fixed reflecting surface, a plurality of expandable melon petal reflecting surfaces and a plurality of driving pieces, wherein a plurality of positioning grooves and positioning flanges which are arranged at intervals are uniformly formed in the edge of the outer ring of the fixed reflecting surface, the back faces of the bottom ends of the melon petal reflecting surfaces can be hinged to the peripheral edge of the top of the mounting tray, when the driving pieces drives the melon petal reflecting surfaces to be unfolded, the bottom ends of the melon petal reflecting surfaces are located in the corresponding positioning grooves or located on the corresponding positioning flanges respectively, every two adjacent melon petal reflecting surfaces are supported and limited through a supporting assembly, and when the driving pieces drive the melon petal reflectingsurfaces to be folded, the melon petal reflecting surfaces positioned in the positioning grooves are folded towards the bottom of the antenna, and the melon petal reflecting surfaces positioned on the positioning flanges are folded towards the top of the antenna. According to the invention, the large-caliber vehicle-mounted deployable composite material antenna has the advantages of high precision, high rigidity, light weight, large storage ratio, automatic folding and unfolding and the like, meets the requirements of vehicle carrying and road over-limit transportation, and can be used in a ground vehicle-mounted mobile communication system and a satellite communication system.

Description

technical field [0001] The invention relates to an antenna, in particular to a large-diameter vehicle-mounted expandable composite material antenna. Background technique [0002] In modern communication systems, antennas, as devices for transmitting or receiving electromagnetic waves into space, play a decisive role in communication performance. With the increase of the amount of information, people have more and more urgent demands on the functions of antennas such as large capacity, high power, and multi-spectral bands. It is necessary to increase the aperture of the antenna as a prerequisite. [0003] As for the movable antenna, while the aperture increases, the transportation difficulty is also increased. At present, the application of vehicle-mounted integral reflector antennas with a diameter of more than 3 meters is restricted. Therefore, the development of large-diameter deployable antennas has gradually attracted attention and has become a research hotspot. [000...

AI Technical Summary

Problems solved by technology

So far, vehicle-mounted deployable composite antennas generally use umbrella-shaped mesh antennas or fixed-surface antennas, which have a limited storage ratio (ratio of the expanded diameter of the reflective surface to the retracted diameter), and relatively low deployment efficiency, reflective surface accuracy, and stiffness. The technical level of the operator is high

[0006] Generally speaking, the existing deployable antennas have disadvantages such as complex structure, large mass, and low deployment efficiency, and technical innovations in high precision, large storage ratio, and lightweight are needed.

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