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Broadband millimeter-wave absorbers: a review

Published online by Cambridge University Press:  15 February 2022

Anupriya Choudhary Open the ORCID record for Anupriya Choudhary [Opens in a new window] ,
Srikanta Pal Open the ORCID record for Srikanta Pal [Opens in a new window]  and
Gautam Sarkhel Open the ORCID record for Gautam Sarkhel [Opens in a new window]
Anupriya Choudhary*
Affiliation:
Department of Electronics & Communications, Birla Institute of Technology, Mesra, Ranchi 835215, India
Srikanta Pal
Affiliation:
Department of Electronics & Communications, Birla Institute of Technology, Mesra, Ranchi 835215, India
Gautam Sarkhel
Affiliation:
Department of Chemical Engineering, Birla Institute of Technology, Mesra, Ranchi 835215, India
*
Author for correspondence: Anupriya Choudhary, E-mail: anupriya010229@gmail.com
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Abstract

This paper reports an exhaustive review of recent research progress in the development of millimeter-wave absorbers. With the advancement in technologies, microwave absorbers have shown their evolution in several applications such as defense, security identification, stealth technology, and several more. The importance of these absorbers is increasing due to electromagnetic interference (EMI) effects. Primarily, an abundant amount of absorbers has been developed in lower frequency bands and with the increasing demand for 5G technology, the usage of millimeter-wave bands has gained attention. This in turn requires the development of millimeter-wave absorbers to provide EMI shielding in several applications. Out of several materials, polymers have grabbed attention in the mitigation of EMI. An absorber that combines carbonaceous elements with polymers offers large design flexibility and tunability per the filler concentration. This paper focuses on the classification of these absorbers based on geometry as well as that by using polymers with their design challenges, merits, and demerits with their industrial applications. Comparative studies of geometrically based absorbers and polymeric-based absorbers are also shown.

Keywords

Carbon nanotubesFSSgraphenemetamaterialsmillimeter-wave absorberspolymers
Type
Metamaterials and Photonic Bandgap Structures
Information
International Journal of Microwave and Wireless Technologies , Volume 15 , Issue 2 , March 2023 , pp. 347 - 363
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Copyright
Copyright © The Author(s), 2022. Published by Cambridge University Press in association with the European Microwave Association

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