A Novel Terahertz Frequency Scanning Antenna Based on Slotted Waveguide Arrays
This research proposes a novel terahertz frequency scanning antenna based on slotted waveguide arrays, and the antenna consisted of 31 elements in a linear array. Usually, the mechanical steering scheme is employed to realize two-dimensional terahertz imaging for most of the systems that inherently...
| Main Authors: | , , , , , , |
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| Format: | Article |
| Language: | English |
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China Science Publishing & Media Ltd. (CSPM)
2018-02-01
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| Series: | Leida xuebao |
| Subjects: | |
| Online Access: | http://radars.ie.ac.cn/fileup/HTML/R17098.htm |
| _version_ | 1797426490779893760 |
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| author | Li Shichao Hou Peipei Qu Jian Hao Congjing Jia Qu Li Gang Li Chao |
| author_facet | Li Shichao Hou Peipei Qu Jian Hao Congjing Jia Qu Li Gang Li Chao |
| author_sort | Li Shichao |
| collection | DOAJ |
| description | This research proposes a novel terahertz frequency scanning antenna based on slotted waveguide arrays, and the antenna consisted of 31 elements in a linear array. Usually, the mechanical steering scheme is employed to realize two-dimensional terahertz imaging for most of the systems that inherently have a low frame rate limitation. As an attractive scheme to obtain high frame rate, electrical beam steering by frequency scanning antennas is the preferable approach. Previous scanning waveguide arrays operating on terahertz band cannot suppress sidelobe levels effectively. Thus, to fulfill the requirement of high radiation efficiency, low waveguide loss, and low sidelobe levels, arranging the slots to conform to Taylor distribution was considered. The distributions effectively become frequency-dependent for the beam-steering concept. Compared with the uniform slot distribution, a Taylor distribution ensures broadband radiation patterns with low sidelobe levels. Furthermore, the offset of the slots has been optimized through a power transmission method in combination with full wave simulation. The frequency-controlled beam steering concept and the sidelobe suppression effect were verified by the quasi-optical measurements in the 0.2 THz band. The fabricated slot-array antenna has large angle scanning ability and a low sidelobe property. In addition, the measured scanning range is larger than 50° with a moderate gain of 15 dB over the frequency band 165～215 GHz. The sidelobe levels are remarkably inhibited over 20 dB normalized to the mainlobe level, and the measured radiation patterns and sidelobe suppression effects agree well with HFSS full-wave simulation. The proposed beam-steering antenna has potential applications for THz imaging with a high frame rate. |
| first_indexed | 2024-03-09T08:30:57Z |
| format | Article |
| id | doaj.art-9cced16cb48746e7adb9fdd5e324dbfd |
| institution | Directory Open Access Journal |
| issn | 2095-283X 2095-283X |
| language | English |
| last_indexed | 2024-03-09T08:30:57Z |
| publishDate | 2018-02-01 |
| publisher | China Science Publishing & Media Ltd. (CSPM) |
| record_format | Article |
| series | Leida xuebao |
| spelling | doaj.art-9cced16cb48746e7adb9fdd5e324dbfd2023-12-02T20:05:45ZengChina Science Publishing & Media Ltd. (CSPM)Leida xuebao2095-283X2095-283X2018-02-017111912610.12000/JR17098A Novel Terahertz Frequency Scanning Antenna Based on Slotted Waveguide ArraysLi Shichao0Hou Peipei1Qu Jian2Hao Congjing3Jia Qu4Li Gang5Li Chao6①(Beijing Aerospace Yilian Science & Technology Development Company Limited, Beijing 100176, China)①(Beijing Aerospace Yilian Science & Technology Development Company Limited, Beijing 100176, China)①(Beijing Aerospace Yilian Science & Technology Development Company Limited, Beijing 100176, China)①(Beijing Aerospace Yilian Science & Technology Development Company Limited, Beijing 100176, China)①(Beijing Aerospace Yilian Science & Technology Development Company Limited, Beijing 100176, China)①(Beijing Aerospace Yilian Science & Technology Development Company Limited, Beijing 100176, China)②(Institute of Electronics, Chinese Academy of Sciences, Beijing 100190, China)This research proposes a novel terahertz frequency scanning antenna based on slotted waveguide arrays, and the antenna consisted of 31 elements in a linear array. Usually, the mechanical steering scheme is employed to realize two-dimensional terahertz imaging for most of the systems that inherently have a low frame rate limitation. As an attractive scheme to obtain high frame rate, electrical beam steering by frequency scanning antennas is the preferable approach. Previous scanning waveguide arrays operating on terahertz band cannot suppress sidelobe levels effectively. Thus, to fulfill the requirement of high radiation efficiency, low waveguide loss, and low sidelobe levels, arranging the slots to conform to Taylor distribution was considered. The distributions effectively become frequency-dependent for the beam-steering concept. Compared with the uniform slot distribution, a Taylor distribution ensures broadband radiation patterns with low sidelobe levels. Furthermore, the offset of the slots has been optimized through a power transmission method in combination with full wave simulation. The frequency-controlled beam steering concept and the sidelobe suppression effect were verified by the quasi-optical measurements in the 0.2 THz band. The fabricated slot-array antenna has large angle scanning ability and a low sidelobe property. In addition, the measured scanning range is larger than 50° with a moderate gain of 15 dB over the frequency band 165～215 GHz. The sidelobe levels are remarkably inhibited over 20 dB normalized to the mainlobe level, and the measured radiation patterns and sidelobe suppression effects agree well with HFSS full-wave simulation. The proposed beam-steering antenna has potential applications for THz imaging with a high frame rate.http://radars.ie.ac.cn/fileup/HTML/R17098.htmTerahertzFrequency scanning antennasSlotted waveguide array antennasTerahertz real-time imaging |
| spellingShingle | Li Shichao Hou Peipei Qu Jian Hao Congjing Jia Qu Li Gang Li Chao A Novel Terahertz Frequency Scanning Antenna Based on Slotted Waveguide Arrays Leida xuebao Terahertz Frequency scanning antennas Slotted waveguide array antennas Terahertz real-time imaging |
| title | A Novel Terahertz Frequency Scanning Antenna Based on Slotted Waveguide Arrays |
| title_full | A Novel Terahertz Frequency Scanning Antenna Based on Slotted Waveguide Arrays |
| title_fullStr | A Novel Terahertz Frequency Scanning Antenna Based on Slotted Waveguide Arrays |
| title_full_unstemmed | A Novel Terahertz Frequency Scanning Antenna Based on Slotted Waveguide Arrays |
| title_short | A Novel Terahertz Frequency Scanning Antenna Based on Slotted Waveguide Arrays |
| title_sort | novel terahertz frequency scanning antenna based on slotted waveguide arrays |
| topic | Terahertz Frequency scanning antennas Slotted waveguide array antennas Terahertz real-time imaging |
| url | http://radars.ie.ac.cn/fileup/HTML/R17098.htm |
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