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Low profile polarization‐insensitive wide stop‐band frequency selective surface with effective electromagnetic shielding
Author(s) -
Paul Gouri Shankar,
Mandal Kaushik,
Das Priyanka
Publication year - 2021
Publication title -
international journal of rf and microwave computer‐aided engineering
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.335
H-Index - 39
eISSN - 1099-047X
pISSN - 1096-4290
DOI - 10.1002/mmce.22527
Subject(s) - wideband , electromagnetic shielding , fractional bandwidth , polarization (electrochemistry) , bandwidth (computing) , reflector (photography) , tunable metamaterials , frequency band , optics , physics , engineering , electrical engineering , telecommunications , band pass filter , metamaterial , chemistry , light source
In this article, a polarization‐insensitive, higher angular stability, and single‐layered miniaturized wide stop‐band frequency selective surface (FSS) is presented for effective electromagnetic shielding over an extremely wideband (9‐20 GHz). A simple square gridded unit cell exhibits wideband rejection with −10 and −20 dB fractional bandwidth of 150.7% (3.4‐24.2 GHz) and 74.5% (9.14‐20 GHz), respectively. The designed unit cell has miniaturized dimensions (0.09λ 0 × 0.09λ 0 × 0.018λ 0 ) as compared to existing research works on wideband FSSs. An equivalent circuit model is developed for the rigorous analysis of the proposed structure. The outcome of this circuit model is validated, and it shows good agreement with the structure simulation results. The measured results bear close resemblance with the simulated results. This FSS can be used to provide shielding from harmful radiations over a wide frequency range and as a good reflector to improve the gain of wideband antennas.