Polarisation Insensitive Active FSS for EM Shielding

Kongari, S and Kumar, A and Chandrakapure, Y and Sarkar, D (2024) Polarisation Insensitive Active FSS for EM Shielding. In: 4th URSI Atlantic Radio Science Meeting, AT-RASC 2024, 19 May 2024 through 24 May 2024, Meloneras.

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Abstract

This paper proposes a narrowband polarisation insensitive transmissive/reflective frequency selective surface (FSS). The FSS comprises unit cells with square and circular metallic loops connected by PIN diodes controlled by a biasing source. In contrast to typical wideband FSSs, the structure provides 0.55 GHz of narrow stopband (a fractional bandwidth of 22) at 2 GHz in the OFF state bias. The bandstop response can be adjusted by varying the reverse bias voltage. The FSS alternates between its functionalities and, in forward bias, provides a passband at the operational frequency. The structure is compact and operates as a transmissive/reflective surface under two different bias conditions (ON and OFF). The design is angularly stable and polarization-insensitive for both TE and TM polarisation. A prototype of the designed structure is developed and the measured results correlate well with the simulated responses. © 2024 URSI.

Item Type:	Conference Paper
Publication:	2024 4th URSI Atlantic Radio Science Meeting, AT-RASC 2024
Publisher:	Institute of Electrical and Electronics Engineers Inc.
Additional Information:	The copyright for this article belongs to the publishers.
Keywords:	Bandwidth; Electric fields; Polarization; Semiconductor diodes, Band-stop response; EM shielding; Fractional bandwidths; Frequency-selective surfaces; Metallics; Narrow bands; Polarization-insensitive; Stopband; Unit cells; Wide-band, Frequency selective surfaces
Department/Centre:	Division of Electrical Sciences > Electrical Communication Engineering
Date Deposited:	09 Oct 2024 12:05
Last Modified:	09 Oct 2024 12:05
URI:	http://eprints.iisc.ac.in/id/eprint/86405

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