Low-Profile and High-Selectivity Frequency Selective Surfaces Based on Mixed Electric and Magnetic Coupling

MA Jun; CHEN Xin-ran; XIANG Kai-ran; CHEN Fu-chang; YAN Jun-jie

doi:10.12263/DZXB.20251023

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Low-Profile and High-Selectivity Frequency Selective Surfaces Based on Mixed Electric and Magnetic Coupling

PAPERS | 更新时间：2026-04-24

- Low-Profile and High-Selectivity Frequency Selective Surfaces Based on Mixed Electric and Magnetic Coupling
- ACTA ELECTRONICA SINICA Vol. 53, Issue 12, Pages: 4485-4493(2025)
- 作者机构：
  
  华南理工大学电子与信息学院，广东广州 510641
- 作者简介：
- 基金信息：
  
  National Natural Science Foundation of China(62501240);Natural Science Foundation of Guangdong Province(2024A1515011615)
- DOI：10.12263/DZXB.20251023
  CLC： TN82;
- Received：04 December 2025，
  
  Accepted：12 December 2025，
  
  Published：25 December 2025
- 稿件说明：
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马骏, 陈欣然, 向凯燃, 等. 基于混合耦合的低剖面高选择性频率选择表面[J]. 电子学报, 2025, 53(12): 4485-4493.

MA Jun, CHEN Xin-ran, XIANG Kai-ran, et al. Low-Profile and High-Selectivity Frequency Selective Surfaces Based on Mixed Electric and Magnetic Coupling[J]. Acta Electronica Sinica, 2025, 53(12): 4485-4493.
马骏, 陈欣然, 向凯燃, 等. 基于混合耦合的低剖面高选择性频率选择表面[J]. 电子学报, 2025, 53(12): 4485-4493. DOI：10.12263/DZXB.20251023

MA Jun, CHEN Xin-ran, XIANG Kai-ran, et al. Low-Profile and High-Selectivity Frequency Selective Surfaces Based on Mixed Electric and Magnetic Coupling[J]. Acta Electronica Sinica, 2025, 53(12): 4485-4493. DOI：10.12263/DZXB.20251023

摘要

本文提出一种基于低剖面叠层贴片结构的高选择性频率选择表面（Frequency Selective Surface，FSS）设计方法.针对频率选择表面综合设计中因结构复杂而导致谐振模式与耦合机制难以准确调控，进而限制传输零点灵活配置的问题，本文提出基于混合电磁耦合理论的等效电路模型，并将其应用于频率选择表面的综合设计中.首先，本文设计并分析了一种弱耦合双层贴片频率选择表面，以阐明其工作机理.研究表明，两层贴片间的混合电磁（Electric and Magnetic，EM）耦合可引入一个可控的传输零点（Transmission Zero，TZ）.在贴片上刻蚀单条或双条缝隙可有效调节耦合强度，从而灵活调控传输零点的位置.建立并验证了等效电路模型，以准确描述该耦合机理.基于此原理，进一步设计了两种在通带一侧具有传输零点的三阶频率选择表面和一种在通带两侧具有传输零点的四阶高选择性频率选择表面，显著提升了频率选择性.制作并测试了工作在4.72 GHz的实物样品，实测结果与仿真结果高度一致.所提出的频率选择表面具有优异的频率选择性，良好的入射角稳定性和低剖面，适用于空间滤波和电磁屏蔽应用.

Abstract

This paper proposes a high-selectivity frequency selective surface (FSS) based on a low-profile stacked patch structure. To address the challenges in the synthesis design of FSS: where complex structures make it difficult to accurately control resonant modes and coupling mechanisms

thereby limiting the flexible control of transmission zeros

equivalent circuit models based on mixed electric and magnetic coupling theory are proposed and applied to the design of FSSs. First

a weakly coupled dual patch FSS is designed and analyzed to clarify its operating mechanism. It is demonstrated that mixed electric and magnetic (EM) coupling between the two patch layers can introduce a controllable transmission zero (TZ). By etching one or two narrow slots on the patches

the EM coupling strength can be effectively adjusted

allowing precise control over the TZ position. An equivalent circuit model is developed and validated to accurately predict the coupling behavior. Based on the working mechanism

two third-order FSSs with single TZ and a fourth-order FSS with TZs on both sides of the passband are further designed

significantly enhancing frequency selectivity. A prototype operating at 4.72 GHz is fabricated and measured

and the measured results are in good agreement with the simulated results. The proposed FSS exhibits excellent out-of-band suppression

stable angular stability and low profile

making it a suitable candidate for advanced spatial filtering and electromagnetic shielding applications.

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references

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