Design of miniaturize flexible wideband frequency selective surface for electromagnetic shielding application

Ghosh, J., Dutta, R., Sarkhel, A. and Abbasi, Q. H. (2022) Design of miniaturize flexible wideband frequency selective surface for electromagnetic shielding application. Waves in Random and Complex Media, (doi: 10.1080/17455030.2022.2121442) (Early Online Publication)

Abstract

In this paper, a flexible, ultra-thin, miniaturized broadband frequency selective surface (FSS) is demonstrated for wideband electromagnetic shielding application. The unit cell of the proposed FSS structure consists of cross dipoles loaded with the metallic circular strip. The proposed miniaturized FSS structure has an extremely low profile with a thickness of 0.0009λo and a unit cell size of 0.045λo×0.045λo. This FSS structure provides wideband shielding of more than 20 dB from 1.1 to 2.6 GHz frequency region. Besides this wide stopband, the FSS structure acts as a transparent window in the n78 frequency band which can be used for the 5G communication purpose. Moreover, by comprehending the interaction between the incident electromagnetic wave and unit cell, a conceptual equivalent circuit model is developed that helps to interpret the mechanism of the miniaturization as well as the broadband response of FSS structure. We also compared the proposed FSS with other recently reported structures and observed more than 55% improvement in size reduction with several other miniaturized flexible FSS structure. Furthermore, this FSS structure exhibits 20  dB attenuation over a wide frequency region with a fractional bandwidth of 111%. Moreover, excellent resonant stability is achieved in regards to different polarization and incident angle up to 60o.

• Item Type: Articles
• Status: Early Online Publication
• Refereed: Yes
• Glasgow Author(s) Enlighten ID: Abbasi, Professor Qammer
• Authors: Ghosh, J., Dutta, R., Sarkhel, A., and Abbasi, Q. H.
• College/School: College of Science and Engineering > School of Engineering > Electronics and Nanoscale Engineering
• Journal Name: Waves in Random and Complex Media
• Publisher: Taylor and Francis
• ISSN: 1745-5030
• ISSN (Online): 1745-5049
• Published Online: 21 September 2022
• Copyright Holders: Copyright © 2022 The Authors
• First Published: First published in Waves in Random and Complex Media 2022
• Publisher Policy: Reproduced under a Creative Commons License