Broadband Permittivity Characterization of Polyvinyl-Alcohol Film for Humidity Sensing Applications
| Autor: | Christian Damm, Donghang Lu, Andreas Penirschke, Matthias Maasch, Rolf Jakoby, Yuliang Zheng |
|---|---|
| Rok vydání: | 2016 |
| Předmět: |
Permittivity
Radiation Materials science 010401 analytical chemistry Relaxation (NMR) Relative permittivity Humidity 02 engineering and technology Dielectric 021001 nanoscience & nanotechnology Condensed Matter Physics 01 natural sciences Polyvinyl alcohol Capacitance 0104 chemical sciences chemistry.chemical_compound Hysteresis chemistry Electronic engineering Electrical and Electronic Engineering Composite material 0210 nano-technology |
| Zdroj: | IEEE Transactions on Microwave Theory and Techniques. 64:3255-3263 |
| ISSN: | 1557-9670 0018-9480 |
| Popis: | This paper presents broadband complex permittivity characterization of polyvinyl-alcohol (PVA) film at different relative humidities (RHs) from 13.7% to 94.3% for sensing applications. Interdigital capacitor is employed as a basic component to characterize the permittivity in a microwave range between 1.5 and 15 GHz. The investigated PVA film shows low hysteresis and stable long interval performance, making it a good candidate for humidity sensing applications. The extracted complex permittivities at different RHs show properties of dielectric relaxation, which is described by the Cole–Cole equation. The coefficients in the Cole–Cole equation are calculated at different RHs. The functions of the coefficients over RH are found, by which the complex permittivity can be obtained at an arbitrary RH. This comprehensive model of the PVA film provides for the first time an accurate mathematical model for RH sensing applications. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|