Metamaterial inspired Ultra-Thin Polarization-Separated UWB FSS to mitigate Ku and K-Band electromagnetic interference

IF 3 3区计算机科学 Q2 ENGINEERING, ELECTRICAL & ELECTRONIC

Aeu-International Journal of Electronics and Communications Pub Date : 2025-03-11 DOI:10.1016/j.aeue.2025.155764

Srimita Coomar , Rajarshi Sanyal , Santanu Mondal

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引用次数: 0

Abstract

A novel design approach is proposed for a sub-wavelength ultrathin (0.00973λ₀) hexagonal snowflake-like fractal configured and diagonally coupled resonator-based frequency selective surface (DCR-FSS), where λ₀ is the lower stop band wavelength in free space. The proposed DCR-FSS demonstrates excellent polarization separation characteristics, revealing a single transmission zero (TZ) in TE mode and dual TZs in TM mode, while maintaining |S₂₁ |≤ −10 dB from 14.6 to 26 GHz, covering the Ku and K band spectral range. Metallic gap adjustment between triangular slotted regions in corner-coupled metallic patches is utilized to finely adjust the TZ and bandwidth. Equivalent circuit models (ECM) in TE and TM modes are introduced to validate the proposed design strategy. Notably, the stop band exhibits dual-negative negative index metamaterial (DNG-NIM) (Re[ε_r] < 0, Re[μ_r] < 0) characteristics around the corresponding TZs for both the TE and TM polarization. Furthermore, significant angular stability up to 30° angles of incidence is achieved with a 2.1 % and 2.5 % frequency deviation in TE and TM modes respectively. Eventually, the proposed design is experimentally validated for both planar and conformal surfaces, yielding results consistent with simulations and measurements.

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超材料启发的超薄极化分离超宽带FSS减轻Ku和k波段电磁干扰

提出了一种亚波长超薄（0.00973λ0）六角形雪花形分形对角耦合谐振器频率选择表面（DCR-FSS）的新设计方法，其中λ0为自由空间下阻带波长。该DCR-FSS具有优异的极化分离特性，在TE模式下呈现单传输零（TZ），在TM模式下呈现双传输零（TZ），同时在14.6 ~ 26 GHz范围内保持|S21 |≤- 10 dB，覆盖Ku和K波段频谱范围。利用角耦合金属贴片中三角形狭缝区域之间的金属间隙调节来精细调节TZ和带宽。引入了TE和TM模式下的等效电路模型（ECM）来验证所提出的设计策略。值得注意的是，阻带呈现双负负折射率超材料（DNG-NIM） (Re[εr] <；0, Re[μr] <；0) TE和TM极化对应的TZs周围的特性。此外，在TE和TM模式下，在频率偏差分别为2.1%和2.5%的情况下，达到了30°入射角的显著角稳定性。最后，提出的设计在平面和保形表面上进行了实验验证，得到了与模拟和测量一致的结果。

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

Aeu-International Journal of Electronics and Communications 工程技术-电信学

CiteScore

6.90

自引率

18.80%

发文量

292

审稿时长

4.9 months

期刊介绍： AEÜ is an international scientific journal which publishes both original works and invited tutorials. The journal''s scope covers all aspects of theory and design of circuits, systems and devices for electronics, signal processing, and communication, including: signal and system theory, digital signal processing network theory and circuit design information theory, communication theory and techniques, modulation, source and channel coding switching theory and techniques, communication protocols optical communications microwave theory and techniques, radar, sonar antennas, wave propagation AEÜ publishes full papers and letters with very short turn around time but a high standard review process. Review cycles are typically finished within twelve weeks by application of modern electronic communication facilities.