首先阐述了基于超材料的雷达/红外兼容隐身材料设计思路,设计了一种频率选择表面和电阻型周期表面双层超材料结构形式的雷达/红外兼容隐身材料;其次,构建了雷达/红外兼容隐身材料的等效电路模型,从等效电路的角度分析了其吸波机理;最后,对设计的雷达/红外兼容隐身结构进行了实验验证.测试表明,实验结果和设计结果一致,当制备的雷达/红外兼容隐身材料的厚度<3 mm时,其反射率在4~8 GHz范围内小于-6 dB,红外发射率仅为0.298.
Based on the new material design concept of metamaterial, the fabrication of radar-infrared stealth-compatible materials through the metamaterial technique was proposed.A kind of radar-infrared stealth-compatible material based on two-double metamaterial structure has been designed.The wave absorbing principle of the radar-infrared stealth-compatible material was studied by equivalent circuit method.In order to confirm the design results, the radar-infrared stealth-compatible material was prepared, and the reflectivity of the absorber was measured, showing that the experimental result was consistent with the design value.When thickness of prepared radar-infrared stealth-compatible material is less than 0.3 mm, the reflectivity bandwidth of 4-8 GHz below-6 dB is obtained and the IR emissivity is 0.298.
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