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设计了一种基于多开口同心银环的红外宽带超材料吸波体,在此基础上提出了基于电流变液的红外智能可调宽带超材料吸波体.采用Microwave Studio CST的频域有限元积分方法对结构单元的有关电磁参数进行仿真计算,结果表明结构单元在波长5.89um~6.4um之间吸收率保持在90%以上;将结构单元置于电流变液中,通过改变电流变液的外加电场强度可以实现吸收频带的智能调控.此外分析了宽带吸收产生的原因,探索了结构尺寸对其吸收特性的影响.该吸波体结构简单,容易制备,在红外辐射屏蔽、红外光谱检测和红外辖射探测等领域具有重要的应用价值.
An infrared wideband metamaterial absorber based on multi-opening concentric silver rings was designed, and based on this, an infrared smart tunable broadband metamaterial absorber based on electrorheological fluid was proposed. Microwave Studio CST frequency domain finite element The integral method is used to simulate the relevant electromagnetic parameters of the structural elements. The results show that the absorption rate of the structural elements is kept above 90% at a wavelength of 5.89um ~ 6.4um. The structural elements are placed in the ER fluid, The applied electric field intensity can realize the intelligent control of the absorption band.Furthermore, the causes of the broadband absorption are analyzed and the influence of the structure size on the absorption characteristics is explored.The structure of the absorber is simple and easy to prepare.At the same time, infrared radiation shielding, infrared spectrum detection and Infrared jurisdiction detection and other fields have important application value.