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Broadband Bi-Directional Polarization-Insensitive Metamaterial Absorber
Conventional metamaterial absorbers eliminate the transmitted electromagnetic wave by attaching the metal plate with the unidirectional absorption performance; these absorbers limit the practical applications to a large extent. In this paper, we present a broadband bi-directional metamaterial absorb...
Autores principales: | , , , , , , |
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Formato: | Online Artículo Texto |
Lenguaje: | English |
Publicado: |
MDPI
2021
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Materias: | |
Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC8658251/ https://www.ncbi.nlm.nih.gov/pubmed/34885498 http://dx.doi.org/10.3390/ma14237339 |
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author | Tian, Feng Ma, Xia Hao, Han Li, Xuewen Fan, Jingdao Guo, Liang Huang, Xiaojun |
author_facet | Tian, Feng Ma, Xia Hao, Han Li, Xuewen Fan, Jingdao Guo, Liang Huang, Xiaojun |
author_sort | Tian, Feng |
collection | PubMed |
description | Conventional metamaterial absorbers eliminate the transmitted electromagnetic wave by attaching the metal plate with the unidirectional absorption performance; these absorbers limit the practical applications to a large extent. In this paper, we present a broadband bi-directional metamaterial absorber by etching chip resistors on the resonators for expanding the bandwidth, and two orthogonal I-shaped structures are pasted on the both sides of the ultra-thin substrate (FR-4) instead of the metal plate for enhancing absorptance of the absorber. Simulated results show that absorptance of the designed absorber is larger than 0.9 in 1.43–2.51 GHz along the forward and backward directions under both TE and TM polarizations. Microwave experiments in the chamber are performed to verify the simulations, and the experimental results exhibit the excellent agreement with the simulations. Additionally, two I-shaped structures are orthogonally pasted on an ultrathin substrate, leading to the impedance-matching of both forward and backward directions, and the absorptance can be tailed dynamically via the middle layer of the substrate. The physics of the absorption are visualized by using a transmission line based on equivalent circuits. We claim that the designed bi-directional metamaterial absorber can be a good candidate for electromagnetic stealth and energy harvesting. |
format | Online Article Text |
id | pubmed-8658251 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2021 |
publisher | MDPI |
record_format | MEDLINE/PubMed |
spelling | pubmed-86582512021-12-10 Broadband Bi-Directional Polarization-Insensitive Metamaterial Absorber Tian, Feng Ma, Xia Hao, Han Li, Xuewen Fan, Jingdao Guo, Liang Huang, Xiaojun Materials (Basel) Article Conventional metamaterial absorbers eliminate the transmitted electromagnetic wave by attaching the metal plate with the unidirectional absorption performance; these absorbers limit the practical applications to a large extent. In this paper, we present a broadband bi-directional metamaterial absorber by etching chip resistors on the resonators for expanding the bandwidth, and two orthogonal I-shaped structures are pasted on the both sides of the ultra-thin substrate (FR-4) instead of the metal plate for enhancing absorptance of the absorber. Simulated results show that absorptance of the designed absorber is larger than 0.9 in 1.43–2.51 GHz along the forward and backward directions under both TE and TM polarizations. Microwave experiments in the chamber are performed to verify the simulations, and the experimental results exhibit the excellent agreement with the simulations. Additionally, two I-shaped structures are orthogonally pasted on an ultrathin substrate, leading to the impedance-matching of both forward and backward directions, and the absorptance can be tailed dynamically via the middle layer of the substrate. The physics of the absorption are visualized by using a transmission line based on equivalent circuits. We claim that the designed bi-directional metamaterial absorber can be a good candidate for electromagnetic stealth and energy harvesting. MDPI 2021-11-30 /pmc/articles/PMC8658251/ /pubmed/34885498 http://dx.doi.org/10.3390/ma14237339 Text en © 2021 by the authors. https://creativecommons.org/licenses/by/4.0/Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (https://creativecommons.org/licenses/by/4.0/). |
spellingShingle | Article Tian, Feng Ma, Xia Hao, Han Li, Xuewen Fan, Jingdao Guo, Liang Huang, Xiaojun Broadband Bi-Directional Polarization-Insensitive Metamaterial Absorber |
title | Broadband Bi-Directional Polarization-Insensitive Metamaterial Absorber |
title_full | Broadband Bi-Directional Polarization-Insensitive Metamaterial Absorber |
title_fullStr | Broadband Bi-Directional Polarization-Insensitive Metamaterial Absorber |
title_full_unstemmed | Broadband Bi-Directional Polarization-Insensitive Metamaterial Absorber |
title_short | Broadband Bi-Directional Polarization-Insensitive Metamaterial Absorber |
title_sort | broadband bi-directional polarization-insensitive metamaterial absorber |
topic | Article |
url | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC8658251/ https://www.ncbi.nlm.nih.gov/pubmed/34885498 http://dx.doi.org/10.3390/ma14237339 |
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