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2. 5D frequency selective surface with quasi‐elliptical bandpass response
Author(s) -
Zhao ZhenZhen,
Chen XiaoMing,
Kishk Ahmed A.,
Zhang AnXue
Publication year - 2021
Publication title -
microwave and optical technology letters
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.304
H-Index - 76
eISSN - 1098-2760
pISSN - 0895-2477
DOI - 10.1002/mop.32798
Subject(s) - passband , band pass filter , transmission (telecommunications) , reflection (computer programming) , selective surface , materials science , optics , substrate (aquarium) , tunable metamaterials , layer (electronics) , acoustics , optoelectronics , physics , telecommunications , engineering , metamaterial , computer science , oceanography , geology , composite material , programming language
In this article, a via‐based 2.5‐dimensional (2.5D) frequency selective surface (FSS) is proposed to realize a quasi‐elliptical bandpass response with high frequency selectivity. Each FSS element is composed of two parts. Part A is a double‐layer metallic circular patches, which are etched on both sides of a thick substrate and connected by a central big metallic via and several small vias. Part B is a single layer metallic circular patch etched on a thin substrate. The proposed FSS features several transmission/reflection zeros, exhibiting a flat transmission in the passband and fast roll‐off out of band. By investigating the electric field distributions, two paths of electromagnetic wave (EMW) propagation are observed, and the physical mechanism of the transmission/reflection zeros of the FSS is obtained. A prototype of the FSS is fabricated to verify the design, and the measured transmission responses agree with the simulated ones.