Novel Designs of SIW-Based Frequency-Selective Surfaces for Electromagnetic Shielding

IF 0.9 Q4 ENGINEERING, ELECTRICAL & ELECTRONIC IEEE Letters on Electromagnetic Compatibility Practice and Applications Pub Date : 2024-04-22 DOI:10.1109/LEMCPA.2024.3392012
Priyanka Das;B. T. P. Madhav
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Abstract

The performance of the substrate-integrated waveguide (SIW)-based frequency-selective surface (FSS) is better than that of the traditional FSSs. Based on SIW cavity (SIWC) technology, two different types of ultrathin ( $0.01\boldsymbol {\lambda }_{\mathbf {0}}$ ) band-stop FSSs have been proposed for dual-band and broadband response. The first design combines two types of FSS slots based on the SIWC to display distinct characteristics in terms of their cavity designs and performance. The design consists of a Y-shaped slot in conjunction with an annular slot within a circular cavity. Consequently, the structure exhibits performance features of a sharp roll-off and dual band-stop response across 1.7–2.7 GHz and 4.6–5.6 GHz with a fractional bandwidth 45% and 20%, respectively. The second design comprises a slotted rectangular SIW cavity-based FSS which exhibits a wide band-reject response across 2.9–19.8 GHz with a fractional bandwidth of 149%. To validate the concept, tangible prototypes have been fabricated, and their functionality has been verified by measurements. The estimated and experimental results show a strong correlation.
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电磁屏蔽用基于 SIW 的频率选择性表面的新型设计
基于基底集成波导(SIW)的频率选择表面(FSS)的性能优于传统的 FSS。基于 SIW 腔(SIWC)技术,我们提出了两种不同类型的超薄($0.01/boldsymbol {\lambda }_{mathbf {0}}$)带阻式 FSS,以实现双频和宽带响应。第一种设计结合了两种基于 SIWC 的 FSS 槽,在腔体设计和性能方面显示出不同的特点。该设计由一个 Y 形槽和一个圆形腔内的环形槽组成。因此,该结构在 1.7-2.7 千兆赫和 4.6-5.6 千兆赫范围内呈现出急剧衰减和双带阻响应的性能特征,分数带宽分别为 45% 和 20%。第二种设计包括一个基于开槽矩形 SIW 腔的 FSS,它在 2.9-19.8 GHz 范围内具有宽带阻带响应,分数带宽为 149%。为了验证这一概念,我们制作了实际原型,并通过测量验证了其功能。估计结果和实验结果显示出很强的相关性。
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Front Cover Table of Contents Synopsis of the March 2025 Issue of the IEEE Letters on Electromagnetic Compatibility Practice and Applications IEEE ELECTROMAGNETIC COMPATIBILITY SOCIETY The Challenge of Surge Protection for LiFePO4 Batteries Using Varistors
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