Dual-Band, Polarization Insensitive, and Flexible EM Wave Absorber with High Angular Stability and Low Cross Reflection Level

2022 3rd URSI Atlantic and Asia Pacific Radio Science Meeting (AT-AP-RASC) Pub Date : 2022-05-29 DOI:10.23919/AT-AP-RASC54737.2022.9814302

Awanish Kumar, G. Reddy, S. Narayan

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引用次数: 2

Abstract

This paper presents a dual-band polarization-insensitive, highly angular stable and flexible EM wave absorber with low cross-polarization reflection. The proposed unit cell has two resonators C and D which offers absorptions at two distinct frequencies at 8.7 and 11.5 GHz frequency in the X band. This FSS unit cell structure has four-fold symmetry make it polarization-insensitive. The absorbance mechanism of the proposed structure is explained with the help of electric and magnetic coupling along with effective impedance plot. The simulation results reveal that for both bands, the proposed absorber is polarization insensitive and angular stable up to 600. Along with this study, reflection due to cross-polarization is also analyzed and included in the absorbance equation, confirming that the proposed design is an absorber, not a polarization converter. Finally, the absorber prototype is fabricated and tested under different conditions, and the measurement results perfectly match the simulation result, which verified that it is working.

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双波段，偏振不敏感，具有高角稳定性和低交叉反射水平的柔性电磁波吸收器

本文提出了一种具有低交叉极化反射的双波段偏振不敏感、高度角稳定和柔性的电磁波吸收器。所提出的单元电池有两个谐振器C和D，在X波段8.7 GHz和11.5 GHz两个不同的频率上提供吸收。这种FSS单晶结构具有四重对称，使其对极化不敏感。利用电磁耦合和有效阻抗图解释了该结构的吸光度机理。仿真结果表明，该吸波器在两个波段均具有偏振不敏感特性，角稳定度可达600。在本研究中，还分析了由于交叉偏振引起的反射，并将其纳入吸光度方程，从而确认了所提出的设计是吸收器，而不是偏振转换器。最后，制作了吸振器样机并在不同条件下进行了测试，测量结果与仿真结果吻合较好，验证了吸振器的工作性能。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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2022 3rd URSI Atlantic and Asia Pacific Radio Science Meeting (AT-AP-RASC)

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