An Ultrathin Polarization Free Asterick-Shaped Metamaterial Absorber with Quad-Band Characteristics

IF 1.2 4区计算机科学 Q4 ENGINEERING, ELECTRICAL & ELECTRONIC

International Journal of Antennas and Propagation Pub Date : 2023-09-05 DOI:10.1155/2023/5664588

Raghvenda Kumar Singh, Ashish Gupta, Akash Yadav, N. Gupta, Utkarsh Tyagi

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Abstract

In this paper, a quad-band absorber is proposed and developed, which is exhibiting ultrathin and polarization insensitive behaviour. It has been designed to be operated in S, C, and Ku bands with absorptions peaks at more than 95%. The proposed absorber is implemented on a FR4 glass epoxy laminate with an equivalent electrical thickness of 0.0108 λ0, where λ0 is the wavelength corresponding to the lowest frequency of operation. This confirms the ultrathin nature of the structure. The absorption performance of the proposed structure has been characterized under normal and oblique incidences followed by their experimental verification. Presented results demonstrate highly polarization-independent behavior of the proposed absorber due to its symmetric geometry. Also, the electromagnetic field distributions have been studied to acquire better insight of the absorption mechanism corresponding to distinct elements present in the structure. It is characterized in terms of its behavior as metamaterial, which ensures the miniaturization. The proposed absorber is suitable to be used in applications like radar cross section reduction, stealth technology, radio frequency identification, and electromagnetic compatibility.

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具有四波段特性的超薄无极化星形超材料吸收体

本文提出并研制了一种具有超薄极化不敏感特性的四波段吸波器。它被设计为在S, C和Ku波段工作，吸收峰在95%以上。所提出的吸收器实现在等效电厚度为0.0108 λ0的FR4环氧玻璃层压板上，其中λ0为最低工作频率对应的波长。这证实了该结构的超薄性质。所提出的结构在正入射和斜入射下的吸收性能进行了表征，并进行了实验验证。所提出的结果表明，由于其对称的几何结构，所提出的吸收体具有高度的极化无关性。此外，还研究了电磁场分布，以便更好地了解结构中不同元素的吸收机制。它的特点是其作为超材料的行为，这保证了小型化。所提出的吸收器适用于雷达横截面减小、隐身技术、射频识别和电磁兼容性等应用。

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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来源期刊

International Journal of Antennas and Propagation ENGINEERING, ELECTRICAL & ELECTRONIC-TELECOMMUNICATIONS

CiteScore

3.10

自引率

13.30%

发文量

158

审稿时长

3.8 months

期刊介绍： International Journal of Antennas and Propagation publishes papers on the design, analysis, and applications of antennas, along with theoretical and practical studies relating the propagation of electromagnetic waves at all relevant frequencies, through space, air, and other media. As well as original research, the International Journal of Antennas and Propagation also publishes focused review articles that examine the state of the art, identify emerging trends, and suggest future directions for developing fields.