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...
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| Format: | Article |
| Language: | English |
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MDPI AG
2021-11-01
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| Series: | Materials |
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| Online Access: | https://www.mdpi.com/1996-1944/14/23/7339 |
| _version_ | 1797507511531601920 |
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| author | Feng Tian Xia Ma Han Hao Xuewen Li Jingdao Fan Liang Guo Xiaojun Huang |
| author_facet | Feng Tian Xia Ma Han Hao Xuewen Li Jingdao Fan Liang Guo Xiaojun Huang |
| author_sort | Feng Tian |
| collection | DOAJ |
| 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. |
| first_indexed | 2024-03-10T04:49:30Z |
| format | Article |
| id | doaj.art-8c31ab2b1f32476e86346b48e6e50ba3 |
| institution | Directory Open Access Journal |
| issn | 1996-1944 |
| language | English |
| last_indexed | 2024-03-10T04:49:30Z |
| publishDate | 2021-11-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Materials |
| spelling | doaj.art-8c31ab2b1f32476e86346b48e6e50ba32023-11-23T02:42:05ZengMDPI AGMaterials1996-19442021-11-011423733910.3390/ma14237339Broadband Bi-Directional Polarization-Insensitive Metamaterial AbsorberFeng Tian0Xia Ma1Han Hao2Xuewen Li3Jingdao Fan4Liang Guo5Xiaojun Huang6College of Communication & Information Engineering, Xi’an University of Science and Technology, Xi’an 710054, ChinaCollege of Communication & Information Engineering, Xi’an University of Science and Technology, Xi’an 710054, ChinaCollege of Communication & Information Engineering, Xi’an University of Science and Technology, Xi’an 710054, ChinaCollege of Safety Science and Engineering, Xi’an University of Science and Technology, Xi’an 710054, ChinaCollege of Safety Science and Engineering, Xi’an University of Science and Technology, Xi’an 710054, ChinaCollege of Physics and Electrical Engineering, Kashi University, Kashi 844007, ChinaCollege of Communication & Information Engineering, Xi’an University of Science and Technology, Xi’an 710054, ChinaConventional 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.https://www.mdpi.com/1996-1944/14/23/7339broadbandbi-directionmetamaterialabsorber |
| spellingShingle | Feng Tian Xia Ma Han Hao Xuewen Li Jingdao Fan Liang Guo Xiaojun Huang Broadband Bi-Directional Polarization-Insensitive Metamaterial Absorber Materials broadband bi-direction 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 | broadband bi-direction metamaterial absorber |
| url | https://www.mdpi.com/1996-1944/14/23/7339 |
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