Hybrid frequency-selective rasorber with low-frequency diffusion and high-frequency absorption
In this article, a novel frequency-selective rasorber (FSR) is proposed, which provides a high-efficiency transmission band and a broadband radar cross section (RCS) reduction by hybridizing low-frequency diffusion and high-frequency absorption. The FSR comprises three layers. A broadband second-ord...
| Main Authors: | , |
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| Other Authors: | |
| Format: | Journal Article |
| Language: | English |
| Published: |
2022
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| Subjects: | |
| Online Access: | https://hdl.handle.net/10356/159776 |
| _version_ | 1826121008123215872 |
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| author | Zhou, Lin Shen, Zhongxiang |
| author2 | School of Electrical and Electronic Engineering |
| author_facet | School of Electrical and Electronic Engineering Zhou, Lin Shen, Zhongxiang |
| author_sort | Zhou, Lin |
| collection | NTU |
| description | In this article, a novel frequency-selective rasorber (FSR) is proposed, which provides a high-efficiency transmission band and a broadband radar cross section (RCS) reduction by hybridizing low-frequency diffusion and high-frequency absorption. The FSR comprises three layers. A broadband second-order bandpass frequency-selective surface is designed as the bottom layer, which has a reflection-transmission-reflection frequency response, and acts as an equivalent ground plane for the upper layers outside the transmission band. A circuit analog absorber and a coding metasurface are designed as the middle and top layers, respectively. They use absorption and diffusion to reduce the RCS at high- and low-frequency bands. In the coding metasurface, miniaturized and absorptive techniques are utilized to suppress the harmonic resonances. The whole FSR unit cell exhibits a cross-polarized reflection-transmission-absorption frequency response. A co-polarized transmission magnitude larger than -1.5 dB from 7.4 to 12.1 GHz and a co-polarized reflection magnitude less than -10 dB from 3.1 to 20 GHz are observed in the full-wave simulation under the normal incidence. An FSR sample with 20×20 unit cells is designed and measured for verification. The measurement agrees well with the simulation, and it shows a significant monostatic RCS reduction from 3.3 to 20 GHz in comparison with a metallic plane of the same size. |
| first_indexed | 2024-10-01T05:25:44Z |
| format | Journal Article |
| id | ntu-10356/159776 |
| institution | Nanyang Technological University |
| language | English |
| last_indexed | 2024-10-01T05:25:44Z |
| publishDate | 2022 |
| record_format | dspace |
| spelling | ntu-10356/1597762022-07-01T08:13:53Z Hybrid frequency-selective rasorber with low-frequency diffusion and high-frequency absorption Zhou, Lin Shen, Zhongxiang School of Electrical and Electronic Engineering Engineering::Electrical and electronic engineering Reflection Frequency Selective Surfaces In this article, a novel frequency-selective rasorber (FSR) is proposed, which provides a high-efficiency transmission band and a broadband radar cross section (RCS) reduction by hybridizing low-frequency diffusion and high-frequency absorption. The FSR comprises three layers. A broadband second-order bandpass frequency-selective surface is designed as the bottom layer, which has a reflection-transmission-reflection frequency response, and acts as an equivalent ground plane for the upper layers outside the transmission band. A circuit analog absorber and a coding metasurface are designed as the middle and top layers, respectively. They use absorption and diffusion to reduce the RCS at high- and low-frequency bands. In the coding metasurface, miniaturized and absorptive techniques are utilized to suppress the harmonic resonances. The whole FSR unit cell exhibits a cross-polarized reflection-transmission-absorption frequency response. A co-polarized transmission magnitude larger than -1.5 dB from 7.4 to 12.1 GHz and a co-polarized reflection magnitude less than -10 dB from 3.1 to 20 GHz are observed in the full-wave simulation under the normal incidence. An FSR sample with 20×20 unit cells is designed and measured for verification. The measurement agrees well with the simulation, and it shows a significant monostatic RCS reduction from 3.3 to 20 GHz in comparison with a metallic plane of the same size. 2022-07-01T08:13:53Z 2022-07-01T08:13:53Z 2020 Journal Article Zhou, L. & Shen, Z. (2020). Hybrid frequency-selective rasorber with low-frequency diffusion and high-frequency absorption. IEEE Transactions On Antennas and Propagation, 69(3), 1469-1476. https://dx.doi.org/10.1109/TAP.2020.3018537 0018-926X https://hdl.handle.net/10356/159776 10.1109/TAP.2020.3018537 2-s2.0-85102238929 3 69 1469 1476 en IEEE Transactions on Antennas and Propagation © 2020 IEEE. All rights reserved. |
| spellingShingle | Engineering::Electrical and electronic engineering Reflection Frequency Selective Surfaces Zhou, Lin Shen, Zhongxiang Hybrid frequency-selective rasorber with low-frequency diffusion and high-frequency absorption |
| title | Hybrid frequency-selective rasorber with low-frequency diffusion and high-frequency absorption |
| title_full | Hybrid frequency-selective rasorber with low-frequency diffusion and high-frequency absorption |
| title_fullStr | Hybrid frequency-selective rasorber with low-frequency diffusion and high-frequency absorption |
| title_full_unstemmed | Hybrid frequency-selective rasorber with low-frequency diffusion and high-frequency absorption |
| title_short | Hybrid frequency-selective rasorber with low-frequency diffusion and high-frequency absorption |
| title_sort | hybrid frequency selective rasorber with low frequency diffusion and high frequency absorption |
| topic | Engineering::Electrical and electronic engineering Reflection Frequency Selective Surfaces |
| url | https://hdl.handle.net/10356/159776 |
| work_keys_str_mv | AT zhoulin hybridfrequencyselectiverasorberwithlowfrequencydiffusionandhighfrequencyabsorption AT shenzhongxiang hybridfrequencyselectiverasorberwithlowfrequencydiffusionandhighfrequencyabsorption |