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A hollow coaxial cable Fabry–Pérot resonator for liquid dielectric constant measurement.
- Source :
-
Review of Scientific Instruments . 2018, Vol. 89 Issue 10, pN.PAG-N.PAG. 5p. 2 Diagrams, 4 Graphs. - Publication Year :
- 2018
-
Abstract
- We report, for the first time, a low-cost and robust homemade hollow coaxial cable Fabry–Pérot resonator (HCC-FPR) for measuring liquid dielectric constant. In the HCC design, the traditional dielectric insulating layer is replaced by air. A metal disk is welded onto the end of the HCC serving as a highly reflective reflector, and an open cavity is engineered on the HCC. After the open cavity is filled with the liquid analyte (e.g., water), the air-liquid interface acts as a highly reflective reflector due to large impedance mismatch. As a result, an HCC-FPR is formed by the two highly reflective reflectors, i.e., the air-liquid interface and the metal disk. We measured the room temperature dielectric constant for ethanol/water mixtures with different concentrations using this homemade HCC-FPR. Monitoring the evaporation of ethanol in ethanol/water mixtures was also conducted to demonstrate the ability of the sensor for continuously monitoring the change in dielectric constant. The results revealed that the HCC-FPR could be a promising evaporation rate detection platform with high performance. Due to its great advantages, such as high robustness, simple configuration, and ease of fabrication, the novel HCC-FPR based liquid dielectric constant sensor is believed to be of high interest in various fields. [ABSTRACT FROM AUTHOR]
- Subjects :
- *RESONATORS
*COAXIAL cables
*PERMITTIVITY
*BIOSENSORS
*REFRACTIVE index
Subjects
Details
- Language :
- English
- ISSN :
- 00346748
- Volume :
- 89
- Issue :
- 10
- Database :
- Academic Search Index
- Journal :
- Review of Scientific Instruments
- Publication Type :
- Academic Journal
- Accession number :
- 129382082
- Full Text :
- https://doi.org/10.1063/1.5021684