Thermal shield with high wave transparent and low aiming line error

Abstract

The invention discloses a thermal shield with the high wave transparency and the low aiming line error. The thermal shield is fixed in a radar radome, the overall thermal shield is of a rotator structure, the shape structure of the thermal shield is co-shaped with the overall internal shape of the radar radome or is co-shaped with the partial internal shape of the radar radome or is of a hemispherical structure, the thermal shield is made of oxide materials with the low dielectric constant or aerogel-based composite materials, the good thermal isolation property is achieved, and meanwhile the high wave transparent property and the low aiming line error property are achieved. According to the thermal shield, by reasonably selecting the materials and structure of the thermal shield, reflection generated between the radar radome and the thermal shield can be counteracted within a certain work frequency range to be extremely little; accordingly, on the basis of not significantly reducing the electrical properties, the thermal property of the radar radome is significantly promoted, the excellent electrical properties of wave transparency and aiming line error are kept, and the problem that the thermal isolation property of the radar radome is not good under the high temperature condition is solved.

Description

Technical field [0001] The invention relates to a heat shield with high transmission wave and low line of sight error. Background technique [0002] The radome is a functional structural part that integrates electrical performance, structural strength, aerodynamic shape and special functional requirements. It is a facility to protect the antenna system from working normally in harsh environmental conditions. The electrical performance is a decisive index for evaluating the quality of the radome. As the flying Mach number increases, the requirements for the performance of the radome, especially the electrical performance, increase. [0003] The hypersonic aircraft flies in the atmosphere, and there is a serious aerodynamic heating phenomenon. The aerodynamic heating environment in the reentry phase is even more severe, and its surface temperature is above 1000 ℃ or even higher. The loaded guidance signal receiving antenna is assembled into a whole with its own wave-transmitting rad...

AI Technical Summary

Problems solved by technology

[0012] The invention provides a heat shield with high wave penetration and low line-of-sight error. By rationally selecting the material and structure of the heat shield, the reflections generated between the radome and the heat shield cancel each other within a certain operating frequency range so that the It is very small, so that the thermal performance of the radome is significantly improved without greatly reducing the electrical performance, and the excellent electrical properties such as wave penetration and line-of-sight error are maintained, which solves the problem of poor heat insulation performance of the radome under high temperature conditions. problem

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