Equivalent Circuit Models for Two-dimensional Full-tensor Anisotropic Acoustic Metamaterials
Equivalent Circuit Models for Two-dimensional Full-tensor Anisotropic Acoustic Metamaterials
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DOI：
10.1109/piers-fall48861.2019.9021320
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发表时间：
2019-12
期刊：
影响因子：
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通讯作者：
T. Nagayama;Shuntaro Uchida;S. Fukushima;Toshio Watanabe
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文献类型：
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作者：
T. Nagayama;Shuntaro Uchida;S. Fukushima;Toshio Watanabe
推广了二维全张量各向异性电磁超材料的等效电路模型理论，并将等效电路模型的设计方法引入到二维全张量各向异性声学超材料的设计中。从电路方程和声学方程的对偶性出发，揭示了电路参数与材料参数的关系，包括质量密度张量的非对角分量。利用等效电路模型设计了一种用于隐藏平面凹凸的二维声毯斗篷，验证了该理论的有效性。进行了电路仿真，并与平面和凹凸情况下的电压分布和雷达截面进行了比较。结果表明，所设计的声毯斗篷具有不受角度影响的隐身性能。
We extend the theory of equivalent circuit models for two-dimensional (2-D) full-tensor anisotropic electromagnetic metamaterials and introduce the design method with equivalent circuit models to designs of 2-D full-tensor anisotropic acoustic metamaterials. Relations of circuit parameters and material parameters including the off-diagonal components of the mass density tensor are revealed from the duality of circuit equations and acoustic equations. A 2D acoustic carpet cloak for hiding a bump on a flat surface is designed with equivalent circuit models to confirm the validity of the theory. Circuit simulations are carried out and the voltage distributions and the radar cross sections are compared with those for the cases with the flat surface and the bump. Those results show the angle independent cloaking operations of the designed acoustic carpet cloak.