High-temperature-resistant low-dielectric-loss cyanate ester-based composite material and application thereof to radar-resistant high-power-density radome

By using a sandwich or multi-layer honeycomb structure of modified cyanate ester-based composite material, the problem of heat dissipation obstruction of radar radome under high power density is solved, achieving high transmittance, low reflectivity and high heat dissipation efficiency, ensuring the heat resistance of the material and avoiding ablation.

CN121821879APending Publication Date: 2026-04-10BEIJING COMPOSITE MATERIALS CO LTD
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Patent Information

Application Number
CN202511729999.8
Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Filing Date
2025-11-24
Publication Date
2026-04-10

AI Technical Summary

Technical Problem

Existing radar radomes experience temperature rises due to impeded heat dissipation under strong electromagnetic pulse radiation, exceeding the material's temperature resistance limit and causing ablation, resulting in failure of wave transmission performance and structural damage.

Method used

High-temperature resistant and low-dielectric-loss cyanate ester-based composite materials are used, including prepreg boards, films and honeycomb. By combining modified cyanate ester-based resin with reinforcing fibers and aramid paper honeycomb, a sandwich or multi-layer honeycomb core structure is formed, which improves the thermal conductivity and heat resistance of the material.

Benefits of technology

It achieves high transmittance, low reflectivity and high heat dissipation efficiency, ensuring that the radome works normally under high power density, avoiding ablation, and improving the heat resistance of the material.

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Abstract

The invention provides a high-temperature-resistant low-dielectric-loss cyanate ester-based composite material and application thereof to a radar-resistant high-power-density antenna housing, and meets the requirement of continuously improving the transmission power of antenna signals on the power-resistant performance of the antenna housing. The high-temperature-resistant low-dielectric-loss cyanate ester-based composite material disclosed by the invention is composed of a prepreg plate, a glue film and a honeycomb, matrix resins of the prepreg plate, the adhesive film and the honeycomb are all modified cyanate ester-based resins; the modified cyanate ester-based resin is prepared by blending and modifying benzoxazine resin, bismaleimide resin, phenolic resin, polyimide resin and cyanate ester resin. The cyanate ester-based composite material with high temperature resistance and low dielectric loss has the advantages of high wave transmission rate, low reflectivity, low thermal conversion efficiency, high heat dissipation efficiency and excellent heat resistance.
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