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3D-printed polarization-independent low-cost flexible frequency selective surface based dual-band microwave absorber

Published online by Cambridge University Press:  16 October 2024

Gaurav Chaitanya Open the ORCID record for Gaurav Chaitanya [Opens in a new window] ,
Paritosh Peshwe ,
Saptarshi Ghosh Open the ORCID record for Saptarshi Ghosh [Opens in a new window]  and
Ashwin Kothari
Gaurav Chaitanya*
Affiliation:
Department of Electronics and Communication Engineering, Indian Institute of Information Technology, Nagpur, India Department of Electronics and Communications Engineering, Acropolis Institute of Technology and Research, Indore, India
Paritosh Peshwe
Affiliation:
Department of Electronics and Communication Engineering, Indian Institute of Information Technology, Nagpur, India
Saptarshi Ghosh
Affiliation:
Department of Electrical Engineering, Indian Institute of Technology Indore, Madhya Pradesh, Indore, India
Ashwin Kothari
Affiliation:
Department of Electronics and Communication Engineering, Visvesvaraya National Institute of Technology, Nagpur, India
*
Corresponding author: Gaurav Chaitanya; Email: [email protected]
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Abstract

A 3D-printed polarization-independent low-cost lightweight and flexible frequency selective surface based dual-band microwave absorber is presented in this paper. Two concentric square loops fabricated at different heights using 3D printing technology are responsible for exhibiting dual-band responses at 3.32 GHz (S-band) and 5.46 GHz (C-band) with more than 97% absorptivities. The corresponding full widths at half maximum bandwidths are observed as 230 MHz (3.21–3.44 GHz) and 450 MHz (5.27–5.72 GHz). The proposed topology is polarization-insensitive owing to the four-fold symmetry. The absorption phenomenon is explained with the analysis of current distributions at the surface and impedance curves at the frequencies of resonance. Further, the performance has been evaluated for both planar and curved surfaces with different angles of curvature, and the good agreement between the measured and simulated responses confirms the flexible behavior of the proposed structure.

Keywords

3D-printingabsorberconformaldual-bandfrequency selective surface (FSS)
Type
Research Paper
Information
International Journal of Microwave and Wireless Technologies , Volume 16 , Issue 9 , November 2024 , pp. 1441 - 1450
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Copyright
© The Author(s), 2024. Published by Cambridge University Press in association with The European Microwave Association.

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