Petal-type deployable space-borne parabolic antenna

Abstract

The invention provides a petal-shaped expansible satellite-borne parabolic antenna. The petal-shaped expansible satellite-borne parabolic antenna comprises a central panel, an arc panel, a driving disc, a synchronous rod, a driving rod, a support rod, a base, a first pair of spherical hinges and a second pair of spherical hinges, wherein the central panel is fixed on the base, the arc panel is arranged at an outer side of the central panel, the driving disc is arranged above the base, the central panel is arranged above the driving disc, the driving disc and the synchronous rod are connected via the first pair of spherical hinges, the synchronous rod and the driving rod are connected via a fourth pair of spherical hinges, the support rod and the driving rod are connected via the second pair of spherical hinges, the support rod and the arc panel are connected via a third pair of spherical hinges, the driving rod is connected to the base via a first pair of hinges, and the arc panel is connected to the base via a second pair of hinges. A petal-shaped folding scheme is provided for a satellite-borne large-diameter fixed-surface antenna, so that the satellite-borne large-diameter fixed-surface antenna is suitably used for carrying and enveloping; an expansion scheme is provided for the petal-shaped expansible fixed-surface antenna; and a single driving scheme requires a few amountof matched hardware such as a motor and a controller, and the weight of the whole structure is reduced.

Description

technical field [0001] The invention relates to the field of space-borne antennas, in particular to a petal-type expandable space-borne parabolic antenna. Background technique [0002] Deployable antennas can be divided into three types according to the composition of the reflective surface of the deployable antenna: solid reflective surface deployable antennas, inflatable deployable antennas and metal mesh deployable antennas. The RMS value of the surface accuracy of the general antenna reflector is in the range of 1 / 00 ​​to 1 / 25λ, where λ is the wavelength of the signal. When the signal frequency reaches 50GHz, the RMS requirement is not less than 0.06-0.24mm, and it is difficult for the air-filled and metal mesh deployable antennas to meet this precision requirement. The solid reflector expands the antenna and becomes an important choice for higher frequency antennas. In order to achieve a wider coverage area and higher transmit and receive power, a large-aperture anten...

AI Technical Summary

Problems solved by technology

When folded, it is required that the deployable antenna can overcome the mechanical environment in the launching stage, and the structure is not damaged; when in orbit, it can realize the reliable deployment of the antenna and maintain the frequency requirements in the deployed state; during long-term work, the deployment mechanism is required to be able to withstand The harsh thermal environment keeps the deployment accuracy. At present, there is no such invention in China that meets the above description, so a new technology is urgently needed

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