A Displacement Sensor Based on a Normal Mode Helical Antenna
This paper presents a passive displacement sensor based on a normal mode helical antenna. The sensor consists of an external helical antenna and an inserting dielectric rod. First, the perturbation theory is adopted to demonstrate that both the electric intensity and magnetic intensity have a notice...
| Main Authors: | , , , , |
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| Format: | Article |
| Language: | English |
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MDPI AG
2019-08-01
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| Series: | Sensors |
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| Online Access: | https://www.mdpi.com/1424-8220/19/17/3767 |
| _version_ | 1818005569364033536 |
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| author | Songtao Xue Zhuoran Yi Liyu Xie Guochun Wan Tao Ding |
| author_facet | Songtao Xue Zhuoran Yi Liyu Xie Guochun Wan Tao Ding |
| author_sort | Songtao Xue |
| collection | DOAJ |
| description | This paper presents a passive displacement sensor based on a normal mode helical antenna. The sensor consists of an external helical antenna and an inserting dielectric rod. First, the perturbation theory is adopted to demonstrate that both the electric intensity and magnetic intensity have a noticeable gradient change within the in-and-out entrance of the helical antenna, which will cause the sensor to experience a resonant frequency shift. This phenomenon was further verified by numerical simulation using the Ansoft high frequency structure simulator (HFSS), and results show the linear correlation between the retrieved resonant frequency and the displacement. Two sets of proposed sensors were fabricated. The experiments validated that the resonant frequency shifts are linearly proportional to the applied displacement, and the sensing range can be adjusted to accommodate the user’s needs. |
| first_indexed | 2024-04-14T04:45:42Z |
| format | Article |
| id | doaj.art-987e7ff72df04509889064802eed02af |
| institution | Directory Open Access Journal |
| issn | 1424-8220 |
| language | English |
| last_indexed | 2024-04-14T04:45:42Z |
| publishDate | 2019-08-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Sensors |
| spelling | doaj.art-987e7ff72df04509889064802eed02af2022-12-22T02:11:28ZengMDPI AGSensors1424-82202019-08-011917376710.3390/s19173767s19173767A Displacement Sensor Based on a Normal Mode Helical AntennaSongtao Xue0Zhuoran Yi1Liyu Xie2Guochun Wan3Tao Ding4Department of Disaster Mitigation for Structures, Tongji University, Shanghai 200092, ChinaDepartment of Disaster Mitigation for Structures, Tongji University, Shanghai 200092, ChinaDepartment of Disaster Mitigation for Structures, Tongji University, Shanghai 200092, ChinaDepartment of Electronic Science and Technology, Tongji University, Shanghai 200092, ChinaInstitute of Precision Optical Engineering, School of Physics Science and Engineering, Tongji University, Shanghai 200092, ChinaThis paper presents a passive displacement sensor based on a normal mode helical antenna. The sensor consists of an external helical antenna and an inserting dielectric rod. First, the perturbation theory is adopted to demonstrate that both the electric intensity and magnetic intensity have a noticeable gradient change within the in-and-out entrance of the helical antenna, which will cause the sensor to experience a resonant frequency shift. This phenomenon was further verified by numerical simulation using the Ansoft high frequency structure simulator (HFSS), and results show the linear correlation between the retrieved resonant frequency and the displacement. Two sets of proposed sensors were fabricated. The experiments validated that the resonant frequency shifts are linearly proportional to the applied displacement, and the sensing range can be adjusted to accommodate the user’s needs.https://www.mdpi.com/1424-8220/19/17/3767displacement sensorhelical antennaresonant frequencyperturbation theorynormal mode |
| spellingShingle | Songtao Xue Zhuoran Yi Liyu Xie Guochun Wan Tao Ding A Displacement Sensor Based on a Normal Mode Helical Antenna Sensors displacement sensor helical antenna resonant frequency perturbation theory normal mode |
| title | A Displacement Sensor Based on a Normal Mode Helical Antenna |
| title_full | A Displacement Sensor Based on a Normal Mode Helical Antenna |
| title_fullStr | A Displacement Sensor Based on a Normal Mode Helical Antenna |
| title_full_unstemmed | A Displacement Sensor Based on a Normal Mode Helical Antenna |
| title_short | A Displacement Sensor Based on a Normal Mode Helical Antenna |
| title_sort | displacement sensor based on a normal mode helical antenna |
| topic | displacement sensor helical antenna resonant frequency perturbation theory normal mode |
| url | https://www.mdpi.com/1424-8220/19/17/3767 |
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