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Highly selective, fractal-configured UWB-FSS for sub-6 GHz 5G, GSM, WLAN, and C band electromagnetic stealth application

Published online by Cambridge University Press:  27 April 2023

Chandranath Chattopadhyay Open the ORCID record for Chandranath Chattopadhyay [Opens in a new window] ,
Srimita Coomar Open the ORCID record for Srimita Coomar [Opens in a new window] ,
Santanu Mondal  and
Rajarshi Sanyal
Chandranath Chattopadhyay*
Affiliation:
Institute of Electronics and Telecommunication Engineers, Kolkata, India
Srimita Coomar
Affiliation:
Institute of Radio Physics & Electronics, University of Calcutta, Kolkata, India
Santanu Mondal
Affiliation:
Institute of Radio Physics & Electronics, University of Calcutta, Kolkata, India
Rajarshi Sanyal
Affiliation:
ECE Department, MCKV Institute of Engineering, Howrah, India
*
Corresponding author: Chandranath Chattopadhyay; E-mail: cchandranath22@gmail.com
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Abstract

A miniaturized and flexible frequency-selective surface (FSS) has been presented in this article with a unit cell size of 0.049 λc × 0.049 λc where λc is the free space wavelength at the lower cut-off frequency. In order to achieve an ultra-wide (−3 dB) second order pass band of 151.3% with enhanced selectivity factor of 0.887, a cascaded triple layered hybrid resonating structure has been proposed with symmetrical Minkowski island-shaped fractal geometry pair and spiral-shaped middle layer in optimized air gap coupling. Furthermore, 149.8% ultra-wide pass band also ascertains the conformal feature of the proposed structure. In addition to this, the proposed FSS provides the stable angular response for both TE and TM polarization. An equivalent circuit model has been synthesized for accurate frequency response. Finally, a sample prototype has been fabricated to verify the experimental validation. Excellent angular stability under large oblique incident and significant conformal characteristics ensure the compatibility of the proposed structure for electromagnetic stealth in 0.9–1.8 GHz GSM band, 2.10–2.14 GHz wireless medical telemetry band, 2.4–2.5 and 4.9–5.8 GHz WLAN band, 3.4–3.7 and 4.4–4.9 GHz sub-6 GHz 5 G band, and 3.7–4.2 GHz C band.

Keywords

Frequency-selective surfaceMinkowski islandselectivity factorultra-wideband
Type
Metamaterials and Photonic Bandgap Structures
Information
International Journal of Microwave and Wireless Technologies , Volume 15 , Special Issue 10: JNM 2022 Special Issue , December 2023 , pp. 1731 - 1744
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Copyright
Copyright © The Author(s), 2023. Published by Cambridge University Press in association with the European Microwave Association

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