Wave-transparent multilayer heat insulation structure for realizing thermal control of spacecraft antenna

Abstract

The invention discloses a wave-transparent multilayer heat insulation structure for realizing thermal control of a spacecraft antenna. The wave-transparent multilayer heat insulation structure comprises reflecting screens (1), spacing layers (2), a surface film (3) and an inner side film (5). The laminated structure of the multiple layers of reflecting screens (1) has the effect of increasing infrared radiation thermal resistance. The spacing layers (2) are arranged between every two layers of reflecting screens (1) to isolate the heat conduction between layers of the reflecting screens (1).The surface film (3) has the effect of reflecting solar spectrum heat radiation. A sewing material (4) is used for multilayer sewing of the reflecting screens (1). An inner side film (5) and the reflecting screens (1) are made of the same material, and the inner side film mainly plays a role in protection to avoid damage caused by friction between the multilayer heat insulation structure and a product . According to the invention, the wave-transparent multilayer heat insulation structure has good transmissivity for working electromagnetic waves of the antenna and has high reliability.

Description

technical field [0001] The invention relates to a wave-transparent multi-layer heat-insulation structure, which belongs to the field of thermal control design of space antennas. Background technique [0002] The practice 20 satellite Ka data transmission antenna uses a new type of high-precision reflector, the reflector has a diameter of 0.75 meters, works in the Ka frequency band, and the shape and surface accuracy requirements are ≤0.1mm (RMS). In order to meet the high stability indicators, It is required that the on-orbit operating temperature of this reflector should not be higher than 80°C. The thermal design scheme of the traditional satellite antenna is to spray a white paint thermal control coating on the working surface, and to cover the traditional multi-layer insulation component (MLI) on the back. [0003] At present, the most commonly used antistatic coating is ACR-1 antistatic organic thermal control coating. This coating degrades seriously in the long-term s...

AI Technical Summary

Problems solved by technology

[0003] At present, the most commonly used anti-static coating is ACR-1 anti-static organic thermal control coating. This coating degrades seriously in the long-term space radiation environment, causing the temperature of the reflector to reach about 100°C at the end of its life, which cannot meet this requirement. Temperature index of a new type of antenna

Images