Method for improving surface roughness of reflecting surface of composite material antenna

By polishing the reflective surface of the composite antenna with a mixture of water and sand of different particle sizes, the surface roughness was controlled within the range of 150–180 nm, which solved the problem of uneven surface roughness, achieved the optimal state of solar absorptivity and reflectivity, and reduced the risk of material cracking and deformation under high and low temperature environments.

CN121624927APending Publication Date: 2026-03-10SHANGHAI COMPOSITES SCI & TECH CO LTD
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Patent Information

Application Number
CN202511815620.5
Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Filing Date
2025-12-04
Publication Date
2026-03-10

AI Technical Summary

Technical Problem

Existing technologies make it difficult to uniformly control the surface roughness of composite antenna reflectors during the polishing process, resulting in suboptimal reflectivity and solar absorptivity.

Method used

Polishing with a mixture of water and sand of different particle sizes reduces the surface roughness of the composite antenna reflector to 90–110 nm, and further improves it to 150–180 nm by adjusting parameters, ensuring uniform surface roughness and optimized electromagnetic performance.

Benefits of technology

It effectively reduces surface roughness inhomogeneity, improves the uniformity and stability of surface roughness, achieves the optimal state of solar absorptivity and reflectivity, and reduces the risk of cracking and deformation of the resin layer under high and low temperature environments.

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Abstract

According to the method for improving the surface roughness of the reflecting surface of the composite material antenna, a composite material component is trimmed to be below 10m for resin layer spraying, the thickness uniformity of a resin-rich layer is improved, then the thickness of the resin-rich layer is further ground, the thickness of the resin-rich layer is controlled to be about 40m, and the surface roughness of the reflecting surface of the composite material antenna is improved. And the possibility of cracking and deformation risks of the resin in high and low temperature environments is reduced. By adopting the method for improving the surface roughness of the reflecting surface of the composite material antenna, the surface roughness of the reflecting surface of the antenna is reduced to about 130nm by using parameters such as water-sand mixed liquid with different particle sizes, the diameter of the polishing disk, the pressure of the polishing disk, the revolution speed of polishing, the polishing time and the like, and then the surface roughness is improved; therefore, the surface roughness is controlled within a certain range, and the optimal state of the solar absorptivity and reflectivity is achieved.
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