用于电磁波传输和非对称吸收的超薄多波段手性元表面

IF 0.9 4区工程技术 Q4 COMPUTER SCIENCE, INTERDISCIPLINARY APPLICATIONS International Journal of RF and Microwave Computer-Aided Engineering Pub Date : 2024-09-19 DOI:10.1155/2024/2326362

Sayan Sarkar, Bhaskar Gupta

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摘要

本文介绍了一种超薄手性元表面，它可以在吸收区域之外的特定频段表现出多波段非对称吸收和对称传输。与大多数电磁元表面吸收器不同的是，所提出的结构底部没有连续的导电片，这也使其能够充当带通空间滤波器。在最高和最低工作自由空间波长处，元表面的衬底厚度分别只有 λhigh/62.5 和 λlow/34。传输带的中心频率为 5.5 千兆赫，非对称吸收带的中心频率分别为 3、3.33 和 4.5 千兆赫。这些工作频带可根据用户要求进行调整。元表面在 TE 和 TM 入射角下的角度稳定性均为 45°。它可用于减少雷达截面（RCS）、电磁屏蔽和空间带通滤波器。

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An Ultrathin Multiband Chiral Metasurface for Transmission and Asymmetric Absorption of Electromagnetic Waves

This article presents an ultrathin chiral metasurface which can exhibit multiband asymmetric absorption as well as symmetric transmission in a specific frequency band outside the absorption regions. Unlike most electromagnetic metasurface absorbers, the proposed structure does not have a continuous conducting sheet at the bottom which also allows it to act as a bandpass spatial filter. The metasurface has a substrate thickness of only λ_high/62.5 and λ_low/34 at the highest and lowest operational free-space wavelengths, respectively. The transmission band is centered at 5.5 GHz, and the asymmetric absorption bands are centered at 3, 3.33, and 4.5 GHz, respectively. The operational bands can be tuned as per user requirements. The metasurface has an angular stability of 45° for both TE and TM incidence. It can be used for radar cross-section (RCS) reduction, electromagnetic shielding, and as a spatial bandpass filter.

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来源期刊

International Journal of RF and Microwave Computer-Aided Engineering 工程技术-工程：电子与电气

CiteScore

4.00

自引率

23.50%

发文量

489

审稿时长

3 months

期刊介绍： International Journal of RF and Microwave Computer-Aided Engineering provides a common forum for the dissemination of research and development results in the areas of computer-aided design and engineering of RF, microwave, and millimeter-wave components, circuits, subsystems, and antennas. The journal is intended to be a single source of valuable information for all engineers and technicians, RF/microwave/mm-wave CAD tool vendors, researchers in industry, government and academia, professors and students, and systems engineers involved in RF/microwave/mm-wave technology. Multidisciplinary in scope, the journal publishes peer-reviewed articles and short papers on topics that include, but are not limited to. . . -Computer-Aided Modeling -Computer-Aided Analysis -Computer-Aided Optimization -Software and Manufacturing Techniques -Computer-Aided Measurements -Measurements Interfaced with CAD Systems In addition, the scope of the journal includes features such as software reviews, RF/microwave/mm-wave CAD related news, including brief reviews of CAD papers published elsewhere and a "Letters to the Editor" section.