A compact dual-polarized Vivaldi antenna with high gain for tree radar applications
A dual-polarized compact Vivaldi antenna with high gain performance is proposed for tree radar applications. The proposed design introduces an array configuration consisting of two pairs of two Vivaldi elements to optimize the operating bandwidth and gain while providing dual-polarization capability...
| Main Authors: | , , , , , |
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| Other Authors: | |
| Format: | Journal Article |
| Language: | English |
| Published: |
2024
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| Subjects: | |
| Online Access: | https://hdl.handle.net/10356/180520 |
| _version_ | 1824456906805084160 |
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| author | Cheng, Kaixuan Lee, Yee Hui Qian, Jiwei Lee, Daryl Yusof, Mohamed Lokman Mohd Yucel, Abdulkadir C. |
| author2 | School of Electrical and Electronic Engineering |
| author_facet | School of Electrical and Electronic Engineering Cheng, Kaixuan Lee, Yee Hui Qian, Jiwei Lee, Daryl Yusof, Mohamed Lokman Mohd Yucel, Abdulkadir C. |
| author_sort | Cheng, Kaixuan |
| collection | NTU |
| description | A dual-polarized compact Vivaldi antenna with high gain performance is proposed for tree radar applications. The proposed design introduces an array configuration consisting of two pairs of two Vivaldi elements to optimize the operating bandwidth and gain while providing dual-polarization capability. To enhance the gain of the proposed antenna over a certain frequency range of interest, directors and edge slots are incorporated into each Vivaldi element. To further enhance the overall antenna gain, a metal back reflector is used. The measurement results of the fabricated antenna show that the proposed antenna achieves a high gain of 5.5 to 14.8 dBi over broadband from 0.5 GHz to 3 GHz. Moreover, it achieves cross-polarization discrimination larger than 20 dB, ensuring high polarization purity. The fabricated antenna is used to detect and image the defects inside tree trunks. The results show that the proposed antenna yields a better-migrated image with a clear defect region compared to that obtained by a commercial Horn antenna. |
| first_indexed | 2025-02-19T04:01:33Z |
| format | Journal Article |
| id | ntu-10356/180520 |
| institution | Nanyang Technological University |
| language | English |
| last_indexed | 2025-02-19T04:01:33Z |
| publishDate | 2024 |
| record_format | dspace |
| spelling | ntu-10356/1805202024-10-11T15:40:52Z A compact dual-polarized Vivaldi antenna with high gain for tree radar applications Cheng, Kaixuan Lee, Yee Hui Qian, Jiwei Lee, Daryl Yusof, Mohamed Lokman Mohd Yucel, Abdulkadir C. School of Electrical and Electronic Engineering Engineering Dual-polarization antenna Ground-penetrating radar A dual-polarized compact Vivaldi antenna with high gain performance is proposed for tree radar applications. The proposed design introduces an array configuration consisting of two pairs of two Vivaldi elements to optimize the operating bandwidth and gain while providing dual-polarization capability. To enhance the gain of the proposed antenna over a certain frequency range of interest, directors and edge slots are incorporated into each Vivaldi element. To further enhance the overall antenna gain, a metal back reflector is used. The measurement results of the fabricated antenna show that the proposed antenna achieves a high gain of 5.5 to 14.8 dBi over broadband from 0.5 GHz to 3 GHz. Moreover, it achieves cross-polarization discrimination larger than 20 dB, ensuring high polarization purity. The fabricated antenna is used to detect and image the defects inside tree trunks. The results show that the proposed antenna yields a better-migrated image with a clear defect region compared to that obtained by a commercial Horn antenna. Ministry of National Development (MND) Published version This work was supported by the Ministry of National Development under the Cities of Tomorrow (CoT) R&D Programme with Award No. COT-V4-2020-6. 2024-10-10T01:39:45Z 2024-10-10T01:39:45Z 2024 Journal Article Cheng, K., Lee, Y. H., Qian, J., Lee, D., Yusof, M. L. M. & Yucel, A. C. (2024). A compact dual-polarized Vivaldi antenna with high gain for tree radar applications. Sensors, 24(13), 4170-. https://dx.doi.org/10.3390/s24134170 1424-8220 https://hdl.handle.net/10356/180520 10.3390/s24134170 24 2-s2.0-85198401107 13 24 4170 en COT-V4-2020-6. Sensors © 2024 by the authors. 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/). application/pdf |
| spellingShingle | Engineering Dual-polarization antenna Ground-penetrating radar Cheng, Kaixuan Lee, Yee Hui Qian, Jiwei Lee, Daryl Yusof, Mohamed Lokman Mohd Yucel, Abdulkadir C. A compact dual-polarized Vivaldi antenna with high gain for tree radar applications |
| title | A compact dual-polarized Vivaldi antenna with high gain for tree radar applications |
| title_full | A compact dual-polarized Vivaldi antenna with high gain for tree radar applications |
| title_fullStr | A compact dual-polarized Vivaldi antenna with high gain for tree radar applications |
| title_full_unstemmed | A compact dual-polarized Vivaldi antenna with high gain for tree radar applications |
| title_short | A compact dual-polarized Vivaldi antenna with high gain for tree radar applications |
| title_sort | compact dual polarized vivaldi antenna with high gain for tree radar applications |
| topic | Engineering Dual-polarization antenna Ground-penetrating radar |
| url | https://hdl.handle.net/10356/180520 |
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