Simplified Approach to Detect Dielectric Constant Using a Low-Cost Microfluidic Quarter Mode Substrate-Integrated Waveguide
Liquid materials’ characterization using commercial probes and radio frequency techniques is expensive and complex. This study proposes a compact and cost-effective radio frequency sensor system to measure the dielectric constant using a three-material calibration. The simplified approach measures r...
| Main Authors: | , , , |
|---|---|
| Format: | Article |
| Language: | English |
| Published: |
MDPI AG
2020-09-01
|
| Series: | Sensors |
| Subjects: | |
| Online Access: | https://www.mdpi.com/1424-8220/20/17/4985 |
| id |
doaj-1efb85c62e7c4988a481c9dea50527cc |
|---|---|
| record_format |
Article |
| spelling |
doaj-1efb85c62e7c4988a481c9dea50527cc2020-11-25T04:00:33ZengMDPI AGSensors1424-82202020-09-01204985498510.3390/s20174985Simplified Approach to Detect Dielectric Constant Using a Low-Cost Microfluidic Quarter Mode Substrate-Integrated WaveguideAhmed Salim0Muhammad Usman Memon1Heijun Jeong2Sungjoon Lim3School of Electrical and Electronics Engineering, College of Engineering, Chung-Ang University, 221, Heukseok-Dong, Dongjak-Gu, Seoul 156-756, KoreaSchool of Electrical and Electronics Engineering, College of Engineering, Chung-Ang University, 221, Heukseok-Dong, Dongjak-Gu, Seoul 156-756, KoreaSchool of Electrical and Electronics Engineering, College of Engineering, Chung-Ang University, 221, Heukseok-Dong, Dongjak-Gu, Seoul 156-756, KoreaSchool of Electrical and Electronics Engineering, College of Engineering, Chung-Ang University, 221, Heukseok-Dong, Dongjak-Gu, Seoul 156-756, KoreaLiquid materials’ characterization using commercial probes and radio frequency techniques is expensive and complex. This study proposes a compact and cost-effective radio frequency sensor system to measure the dielectric constant using a three-material calibration. The simplified approach measures reflection coefficient magnitudes for all four materials rather than the complex values in conventional permittivity detection systems. We employ a sensor module based on a circular substrate-integrated waveguide with measured unloaded quality factor = 910 to ensure measurement reliability. Miniaturized quarter-mode substrate-integrated waveguide resonators are integrated with four microfluidic channels containing three known materials and one unknown analyte. Step-wise measurement and linearity ensures maximum 4% error for the dielectric constant compared with results obtained using a high-performance commercial product.https://www.mdpi.com/1424-8220/20/17/4985substrate-integrated waveguideRF sensorchemical sensordielectric constant detectioncalibration |
| collection |
DOAJ |
| language |
English |
| format |
Article |
| sources |
DOAJ |
| author |
Ahmed Salim Muhammad Usman Memon Heijun Jeong Sungjoon Lim |
| spellingShingle |
Ahmed Salim Muhammad Usman Memon Heijun Jeong Sungjoon Lim Simplified Approach to Detect Dielectric Constant Using a Low-Cost Microfluidic Quarter Mode Substrate-Integrated Waveguide Sensors substrate-integrated waveguide RF sensor chemical sensor dielectric constant detection calibration |
| author_facet |
Ahmed Salim Muhammad Usman Memon Heijun Jeong Sungjoon Lim |
| author_sort |
Ahmed Salim |
| title |
Simplified Approach to Detect Dielectric Constant Using a Low-Cost Microfluidic Quarter Mode Substrate-Integrated Waveguide |
| title_short |
Simplified Approach to Detect Dielectric Constant Using a Low-Cost Microfluidic Quarter Mode Substrate-Integrated Waveguide |
| title_full |
Simplified Approach to Detect Dielectric Constant Using a Low-Cost Microfluidic Quarter Mode Substrate-Integrated Waveguide |
| title_fullStr |
Simplified Approach to Detect Dielectric Constant Using a Low-Cost Microfluidic Quarter Mode Substrate-Integrated Waveguide |
| title_full_unstemmed |
Simplified Approach to Detect Dielectric Constant Using a Low-Cost Microfluidic Quarter Mode Substrate-Integrated Waveguide |
| title_sort |
simplified approach to detect dielectric constant using a low-cost microfluidic quarter mode substrate-integrated waveguide |
| publisher |
MDPI AG |
| series |
Sensors |
| issn |
1424-8220 |
| publishDate |
2020-09-01 |
| description |
Liquid materials’ characterization using commercial probes and radio frequency techniques is expensive and complex. This study proposes a compact and cost-effective radio frequency sensor system to measure the dielectric constant using a three-material calibration. The simplified approach measures reflection coefficient magnitudes for all four materials rather than the complex values in conventional permittivity detection systems. We employ a sensor module based on a circular substrate-integrated waveguide with measured unloaded quality factor = 910 to ensure measurement reliability. Miniaturized quarter-mode substrate-integrated waveguide resonators are integrated with four microfluidic channels containing three known materials and one unknown analyte. Step-wise measurement and linearity ensures maximum 4% error for the dielectric constant compared with results obtained using a high-performance commercial product. |
| topic |
substrate-integrated waveguide RF sensor chemical sensor dielectric constant detection calibration |
| url |
https://www.mdpi.com/1424-8220/20/17/4985 |
| work_keys_str_mv |
AT ahmedsalim simplifiedapproachtodetectdielectricconstantusingalowcostmicrofluidicquartermodesubstrateintegratedwaveguide AT muhammadusmanmemon simplifiedapproachtodetectdielectricconstantusingalowcostmicrofluidicquartermodesubstrateintegratedwaveguide AT heijunjeong simplifiedapproachtodetectdielectricconstantusingalowcostmicrofluidicquartermodesubstrateintegratedwaveguide AT sungjoonlim simplifiedapproachtodetectdielectricconstantusingalowcostmicrofluidicquartermodesubstrateintegratedwaveguide |
| _version_ |
1724449827244212224 |