Compact Dual-Passband Three-Dimensional FSS with Good Angular Stability and Both-Side Fast Roll-Off Characteristics

IF 0.6 4区计算机科学 Q4 ENGINEERING, ELECTRICAL & ELECTRONIC

Applied Computational Electromagnetics Society Journal Pub Date : 2021-08-06 DOI:10.47037/2020.aces.j.360607

Zhengyong Yu, Li Baozhu, Shenggao Ding, Wanchun Tang

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引用次数: 0

Abstract

A compact dual-passband three-dimensional (3D) frequency selective surface (FSS) is proposed based on multiple square coaxial waveguides (SCWs), which exhibits good angular stability and both-side fast roll-off characteristics. The unit cell of the proposed 3D FSS is composed of one parallel plate waveguide (PPW) propagation path and two SCW propagation paths. By etching a centered annular slot, each SCW path forms two identical short SCWs. Each short SCW inherently generates one square slot resonance. In each SCW path, on the account of electromagnetic coupling between two square slot resonators provided by two short SCWs, the square slot resonant mode will split into even-/odd-resonant modes. Accordingly, each SCW path can provide a flat second-order passband with two transmission poles. Due to the reflection and out of phase of electromagnetic waves, four transmission zeros located at both sides of the passbands are introduced for high frequency selectivity, realizing both-side fast roll-off performances. In order to explain the operating principle, the electric-field distributions at transmission-zero/pole frequencies are investigated. Finally, an FSS prototype is fabricated and measured, and the results exhibit good angular stability for both TE and TM polarizations under incident angles from 0° to 60°. In addition, the proposed 3D FSS has a compact unit cell.

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紧凑的双通带三维FSS，具有良好的角稳定性和两侧快速滚转特性

提出了一种紧凑的双通带三维频率选择表面(FSS)，该表面具有良好的角稳定性和双侧快速滚转特性。所提出的三维FSS单元由一条平行板波导(PPW)传播路径和两条平行板波导(SCW)传播路径组成。通过蚀刻中心环形槽，每个SCW路径形成两个相同的短SCW。每个短SCW固有地产生一个方槽谐振。在每条SCW路径中，由于两个短SCW提供的两个方槽谐振器之间的电磁耦合，方槽谐振模式将分裂为偶/奇谐振模式。因此，每个SCW路径可以提供具有两个传输极的平坦二阶通带。由于电磁波的反射和失相，在通带两侧引入了四个传输零点，实现了高频率选择性，实现了双侧快速滚转性能。为了解释其工作原理，研究了传输零/极频率下的电场分布。最后，制作了FSS原型并进行了测量，结果表明，在0°~ 60°入射角范围内，FSS在TE偏振和TM偏振下均具有良好的角稳定性。此外，所提出的三维fssi具有紧凑的单元胞。

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

Applied Computational Electromagnetics Society Journal 工程技术-电信学

CiteScore

1.60

自引率

28.60%

发文量

审稿时长

9 months

期刊介绍： The ACES Journal is devoted to the exchange of information in computational electromagnetics, to the advancement of the state of the art, and to the promotion of related technical activities. A primary objective of the information exchange is the elimination of the need to "re-invent the wheel" to solve a previously solved computational problem in electrical engineering, physics, or related fields of study. The ACES Journal welcomes original, previously unpublished papers, relating to applied computational electromagnetics. All papers are refereed. A unique feature of ACES Journal is the publication of unsuccessful efforts in applied computational electromagnetics. Publication of such material provides a means to discuss problem areas in electromagnetic modeling. Manuscripts representing an unsuccessful application or negative result in computational electromagnetics is considered for publication only if a reasonable expectation of success (and a reasonable effort) are reflected. The technical activities promoted by this publication include code validation, performance analysis, and input/output standardization; code or technique optimization and error minimization; innovations in solution technique or in data input/output; identification of new applications for electromagnetics modeling codes and techniques; integration of computational electromagnetics techniques with new computer architectures; and correlation of computational parameters with physical mechanisms.