It was difficult to solve the conflict of integrating the lightweight property, mechanical resistance, and broadband microwave absorption into one composite structure. Herein, the glass fiber (GF)/carbon fiber (CF) reinforced lightweight multifunctional metastructure with mechanical resistance and broadband microwave absorption was designed and optimized through the genetic algorithms and fabricated with the autoclave-vacuum bag technique. The proposed GF/CF reinforced metastructure (GF/CFRM) covered the −10 dB effective bandwidth in the full frequency band of 2–18 GHz with average reflectivity of −16.7 dB. The proposed electromagnetic theory was effective to predict the reflectivity of the metastructure. The GF/CFRM achieved the flexural strength of 42 MPa with the areal density and equivalent density of 8.26 kg/m ² . The addition of the patterned resistive film introduced multiple absorption peaks in different frequency points. The integration of the lightweight property, load bearing, and broadband microwave absorption was realized.

中文翻译：

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具有超宽带微波吸收的机械增强轻型多功能超结构

很难解决将轻量化、机械阻力和宽带微波吸收集成到一个复合结构中的冲突。在此，通过遗传算法设计和优化了具有机械阻力和宽带微波吸收的玻璃纤维（GF）/碳纤维（CF）增强轻质多功能超结构，并采用高压釜真空袋技术制造。提议的 GF/CF 增强元结构 (GF/CFRM) 覆盖了 2-18 GHz 全频带中的 -10 dB 有效带宽，平均反射率为 -16.7 dB。所提出的电磁理论可有效预测超结构的反射率。GF/CFRM 的弯曲强度达到 42 MPa，面密度和等效密度为 8.26 kg/m ² . 图案化电阻膜的添加在不同频率点引入了多个吸收峰。实现了轻量化、承重、宽带微波吸收的集成。