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Inkjet-printed broadband FSS-based absorber with improved absorption characteristics

Published online by Cambridge University Press:  19 May 2023

Manish Mathew Tirkey Open the ORCID record for Manish Mathew Tirkey [Opens in a new window]  and
Nisha Gupta Open the ORCID record for Nisha Gupta [Opens in a new window]
Manish Mathew Tirkey*
Affiliation:
Department of Electronics and Communication Engineering, Birla Institute of Technology, Mesra, Ranchi, Jharkhand, India
Nisha Gupta
Affiliation:
Department of Electronics and Communication Engineering, Birla Institute of Technology, Mesra, Ranchi, Jharkhand, India
*
Corresponding author: Manish Mathew Tirkey, Email: [email protected]
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Abstract

We present the design for a thin planar microwave absorber depicting near unity absorption over a wide bandwidth. The absorber consists of a single layer of resistive frequency selective surface inkjet printed over a paper substrate and suspended over a grounded foam. We have been able to achieve 99.99% absorption of normally incident radiations from 9.7 to 11.74 GHz at an extremely low level of −40 dB absorption bandwidth. The proposed absorber is thin (0.22λ0 at the center frequency), polarization-insensitive, and presents −10, −20, −30, and −40 dB fractional bandwidths as 89.83%, 55.41%, 33.30%, and 19.03%, respectively. It is worth mentioning that the design of an absorber with such steep slopes is highly stringent and requires special attention. Finally, we have experimentally demonstrated the perfect broadband absorption characteristics with a fabricated prototype.

Keywords

broadbandfrequency selective surfaceperfect broadband absorberpolarization-insensitiveultrathin
Type
Metamaterials and Photonic Bandgap Structures
Information
International Journal of Microwave and Wireless Technologies , Volume 16 , Special Issue 1: MMS 2022 Special Issue , February 2024 , pp. 92 - 100
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Copyright
© The Author(s), 2023. Published by Cambridge University Press in association with the European Microwave Association

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