用于 S、C 和 X 波段的广角超材料吸收器

IF 0.8 4区工程技术 Q4 ENGINEERING, ELECTRICAL & ELECTRONIC

Frequenz Pub Date : 2023-11-24 DOI:10.1515/freq-2022-0283

Pavan Kumar Shukla, Neelesh Kumar Gupta, Achyutanand Mishra, Sharmila, Apranjal Singh, Chetan Barde

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引用次数: 0

摘要

摘要本文设计并演示了一种与角度无关的超材料微波吸收器（MMA）。该设计由两个通过合并电阻器连接的同心六边形组成。吸收器印制在厚度为 3.2 毫米（λ/0.07）、介电常数为 4.3 的金属背衬低成本 FR4 介质基板上。所提出的结构具有 2.8 至 10.42 GHz 的宽吸收带宽，吸收率超过 90%，覆盖 S、C 和 X 波段。在感兴趣的区域，对电流和电场分布进行了研究，发现在 3.66 和 9.54 千兆赫频率处有两个最大峰值，最大吸收率分别为 99.99 % 和 99.44 %。在 phi 和 theta 变化的不同极化角下，对所介绍的吸收器进行了检验。制作的吸收片由一个单元阵列组成，在电波暗室中借助两个喇叭天线和 VNA 对其进行了测试。对测试结果和模拟结果进行比较后发现，两者几乎相差无几，由于制造公差而产生的变化很小。所介绍的吸收器可实际用于国防应用，以降低雷达截面（RCS）。

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Wide angle metamaterial absorber for S, C and X band application

Abstract In this article, an angle independent Metamaterial Microwave Absorbers (MMA) is designed and demonstrated. The design consists of two concentric hexagon connected through consolidated resistors. The absorber is imprinted on a metal-backed low cost FR4 dielectric substrate with a thickness of 3.2 mm (λ/0.07) and a dielectric constant of 4.3. The proposed structure exhibits a wide absorption bandwidth ranging from 2.8 to 10.42 GHz with absorptivity above 90 % covering S, C and X Band. In the area of interest, the current and electric field distribution has been examined, for two maximum peaks at a frequency of 3.66 and 9.54 GHz, with maximum absorptivity of 99.99 % and 99.44 % respectively. The presented absorber is examined under different polarization angles for phi and theta variation. The fabricated sheet consists of an array of a unit cell, which is examined inside the anechoic chamber with the help of two horn antennas and VNA. The tested and simulated results are compared and it was found that they are almost similar to each other with little variation due to fabrication tolerance. The presented absorber can be practically used for defence applications for Radar Cross Sections (RCS) reduction.

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来源期刊

Frequenz 工程技术-工程：电子与电气

CiteScore

2.40

自引率

18.20%

发文量

审稿时长

3 months

期刊介绍： Frequenz is one of the leading scientific and technological journals covering all aspects of RF-, Microwave-, and THz-Engineering. It is a peer-reviewed, bi-monthly published journal. Frequenz was first published in 1947 with a circulation of 7000 copies, focusing on telecommunications. Today, the major objective of Frequenz is to highlight current research activities and development efforts in RF-, Microwave-, and THz-Engineering throughout a wide frequency spectrum ranging from radio via microwave up to THz frequencies. RF-, Microwave-, and THz-Engineering is a very active area of Research & Development as well as of Applications in a wide variety of fields. It has been the key to enabling technologies responsible for phenomenal growth of satellite broadcasting, wireless communications, satellite and terrestrial mobile communications and navigation, high-speed THz communication systems. It will open up new technologies in communications, radar, remote sensing and imaging, in identification and localization as well as in sensors, e.g. for wireless industrial process and environmental monitoring as well as for biomedical sensing.