Design and Validation of Groundless Uni- and Bi-Directional Electromagnetic Absorbers Using Lossy Metagratings

IF 4.5 1区工程技术 Q2 ENGINEERING, ELECTRICAL & ELECTRONIC

IEEE Transactions on Microwave Theory and Techniques Pub Date : 2025-07-15 DOI:10.1109/TMTT.2025.3576268

Zhen Tan;Jianjia Yi;Jian-Xin Chen;Shah Nawaz Burokur

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Abstract

In this article, a design methodology for groundless metagrating absorbers is proposed. By strategically arranging sub wavelength microstrip capacitors in series with chip resistors on the upper and lower layers of a dielectric substrate, uni- or bi-directional electromagnetic absorption can be effectively realized at a desired operating frequency. The entire design process is based on a fully analytical derivation, with clear mathematical theory, and is applicable across a broad range of frequencies, including microwave, millimeter-wave, and even terahertz bands. The full-wave simulation results of the proposed uni- and bi-directional absorbers show excellent agreement with theoretical calculations, validating the efficacy of the methodology. Additionally, for the bi-directional absorber, a prototype operating around 10 GHz is fabricated and measured, with experimental results aligning well with the simulated ones. Compared to other grounded metamaterial/metasurface absorbers, the proposed groundless structure offers adaptability in terms of conformability, making it more suitable for practical applications. This enhanced conformability suggests a promising potential for the future application of external electromagnetic stealth and internal electromagnetic compatibility.

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无基单、双向电磁吸波器的设计与验证

本文提出了一种无接地偏析吸收器的设计方法。通过将亚波长微带电容器与贴片电阻串联在介电基片的上下两层，可以有效地在所需的工作频率下实现单向或双向电磁吸收。整个设计过程基于完全的解析推导，具有明确的数学理论，适用于广泛的频率范围，包括微波，毫米波，甚至太赫兹波段。单、双向吸波器的全波仿真结果与理论计算结果吻合良好，验证了该方法的有效性。此外，还制作了工作在10ghz左右的双向吸收体样机并进行了测量，实验结果与仿真结果吻合较好。与其他接地的超表面吸波材料相比，本文提出的无接地结构在一致性方面具有适应性，更适合实际应用。这种增强的一致性表明了外部电磁隐身和内部电磁兼容的未来应用前景广阔。

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

IEEE Transactions on Microwave Theory and Techniques 工程技术-工程：电子与电气

CiteScore

8.60

自引率

18.60%

发文量

486

审稿时长

6 months

期刊介绍： The IEEE Transactions on Microwave Theory and Techniques focuses on that part of engineering and theory associated with microwave/millimeter-wave components, devices, circuits, and systems involving the generation, modulation, demodulation, control, transmission, and detection of microwave signals. This includes scientific, technical, and industrial, activities. Microwave theory and techniques relates to electromagnetic waves usually in the frequency region between a few MHz and a THz; other spectral regions and wave types are included within the scope of the Society whenever basic microwave theory and techniques can yield useful results. Generally, this occurs in the theory of wave propagation in structures with dimensions comparable to a wavelength, and in the related techniques for analysis and design.