Design of a High Sensitivity Microwave Sensor for Liquid Dielectric Constant Measurement
In order to improve the sensitivity of liquid dielectric constant measurements, a liquid dielectric constant sensor based on a cubic container structure is proposed for the first time. The cubic container, which consists of a dielectric substrate with a split resonant ring (SRR) and microstrip lines...
| Main Authors: | , , , , |
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| Format: | Article |
| Language: | English |
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MDPI AG
2020-09-01
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| Series: | Sensors |
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| Online Access: | https://www.mdpi.com/1424-8220/20/19/5598 |
| _version_ | 1797552239509766144 |
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| author | Honggang Hao Dexu Wang Zhu Wang Bo Yin Wei Ruan |
| author_facet | Honggang Hao Dexu Wang Zhu Wang Bo Yin Wei Ruan |
| author_sort | Honggang Hao |
| collection | DOAJ |
| description | In order to improve the sensitivity of liquid dielectric constant measurements, a liquid dielectric constant sensor based on a cubic container structure is proposed for the first time. The cubic container, which consists of a dielectric substrate with a split resonant ring (SRR) and microstrip lines, can enhance the electric field intensity in the measuring area. High sensitivity can be obtained from measuring the dielectric constant with the characteristics of the structure resonate. The research results show that the resonant frequency of the sensor is shifted from 7.69 GHz to 5.70 GHz, with about a 2 GHz frequency offset, when the dielectric constant of the sample varied from 1 to 10. A resonance frequency offset of 200 MHz for the per unit dielectric constant is achieved, which is excellent regarding performance. The permittivity of oil with a different metal content is measured by using the relation between the fitted permittivity and the resonant frequency. The relative error is less than 1.5% and the sensitivity of measuring is up to 3.45%. |
| first_indexed | 2024-03-10T15:57:08Z |
| format | Article |
| id | doaj.art-bc2524a3b1bc4b89ae50d04b3baf895b |
| institution | Directory Open Access Journal |
| issn | 1424-8220 |
| language | English |
| last_indexed | 2024-03-10T15:57:08Z |
| publishDate | 2020-09-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Sensors |
| spelling | doaj.art-bc2524a3b1bc4b89ae50d04b3baf895b2023-11-20T15:34:06ZengMDPI AGSensors1424-82202020-09-012019559810.3390/s20195598Design of a High Sensitivity Microwave Sensor for Liquid Dielectric Constant MeasurementHonggang Hao0Dexu Wang1Zhu Wang2Bo Yin3Wei Ruan4College of Electronic Engineering, Chongqing University of Posts and Telecommunications, Chongqing 400065, ChinaCollege of Electronic Engineering, Chongqing University of Posts and Telecommunications, Chongqing 400065, ChinaCollege of Electronic Engineering, Chongqing University of Posts and Telecommunications, Chongqing 400065, ChinaCollege of Electronic Engineering, Chongqing University of Posts and Telecommunications, Chongqing 400065, ChinaCollege of Electronic Engineering, Chongqing University of Posts and Telecommunications, Chongqing 400065, ChinaIn order to improve the sensitivity of liquid dielectric constant measurements, a liquid dielectric constant sensor based on a cubic container structure is proposed for the first time. The cubic container, which consists of a dielectric substrate with a split resonant ring (SRR) and microstrip lines, can enhance the electric field intensity in the measuring area. High sensitivity can be obtained from measuring the dielectric constant with the characteristics of the structure resonate. The research results show that the resonant frequency of the sensor is shifted from 7.69 GHz to 5.70 GHz, with about a 2 GHz frequency offset, when the dielectric constant of the sample varied from 1 to 10. A resonance frequency offset of 200 MHz for the per unit dielectric constant is achieved, which is excellent regarding performance. The permittivity of oil with a different metal content is measured by using the relation between the fitted permittivity and the resonant frequency. The relative error is less than 1.5% and the sensitivity of measuring is up to 3.45%.https://www.mdpi.com/1424-8220/20/19/5598dielectric constantliquidsensorSRRCSRR |
| spellingShingle | Honggang Hao Dexu Wang Zhu Wang Bo Yin Wei Ruan Design of a High Sensitivity Microwave Sensor for Liquid Dielectric Constant Measurement Sensors dielectric constant liquid sensor SRR CSRR |
| title | Design of a High Sensitivity Microwave Sensor for Liquid Dielectric Constant Measurement |
| title_full | Design of a High Sensitivity Microwave Sensor for Liquid Dielectric Constant Measurement |
| title_fullStr | Design of a High Sensitivity Microwave Sensor for Liquid Dielectric Constant Measurement |
| title_full_unstemmed | Design of a High Sensitivity Microwave Sensor for Liquid Dielectric Constant Measurement |
| title_short | Design of a High Sensitivity Microwave Sensor for Liquid Dielectric Constant Measurement |
| title_sort | design of a high sensitivity microwave sensor for liquid dielectric constant measurement |
| topic | dielectric constant liquid sensor SRR CSRR |
| url | https://www.mdpi.com/1424-8220/20/19/5598 |
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