三维螺旋超结构/介质的低频协同效应及其吸波蜂窝制备

Low-frequency Synergistic Effect of 3D Helical Metastructure/Medium and Preparation of Its Absorbing Honeycomb

中文关键词: 蜂窝吸波材料  超材料  低频吸收  等效电路

英文关键词: honeycomb absorbing materials  metamaterials  low-frequency absorption  equivalent circuit

中文摘要:

      目的 拓展蜂窝吸波材料的低频吸收性能，提出一种三维螺旋超结构复合吸波蜂窝的设计方法。方法 在吸波蜂窝中加载三维螺旋超结构，使用电磁场理论和等效电路理论定性分析螺旋超结构对复合蜂窝吸收性能的调控作用，以优化螺旋超结构的参数。结果 入射电磁波在螺旋超结构表面激发驻波电流，产生强烈的电共振和磁共振，与蜂窝损耗介质产生协同吸收效应，增强了吸波蜂窝的低频吸收性能。结论 仿真和实验结果表明，加载三维螺旋超结构使得吸波蜂窝的低频吸收性能显著增强，在1~6 GHz频段的平均反射损耗从−3 dB增强至−10 dB。

英文摘要:

      Thework aims to propose a design method of 3D helical metastructure composite absorbing honeycomb, in order to expand the low-frequency absorption properties of honeycomb absorbing materials. The 3D helical metastructure was loaded in the absorbing honeycomb, and the regulation effect of the helical metastructure on the absorption properties of the composite honeycomb was qualitatively analyzed by the electromagnetic field theory and the equivalent circuit theory, so as to optimize the structural parameters of the helical metastructure. The incident electromagnetic wave excited the standing wave current on the surface of the helical metastructure, produced strong electrical resonance and magnetic resonance, and generated a synergistic absorption effect with the honeycomb loss medium, which enhanced the low-frequency absorption properties of the absorbing honeycomb. The simulation and experimental results show that the low-frequency absorption properties of the absorbing honeycomb are significantly enhanced by loading the 3D helical metastructure, and the average reflection loss of the 1-6 GHz is enhanced from −3 dB to −10 dB.