Title :
Humidity dependent permittivity characterization of polyvinyl-alcohol film and its application in relative humidity RF sensor
Author :
Donghang Lu ; Yuliang Zheng ; Penirschke, Andreas ; Wiens, Alex ; Wenjuan Hu ; Jakoby, Rolf
Author_Institution :
Inst. for Microwave Eng. & Photonics, Tech. Univ. Darmstadt, Darmstadt, Germany
Abstract :
This work addresses the dielectric characterization of polyvinyl-alcohol (PVA) in humidity sensing applications. The PVA film is characterized in relative humidity (RH) range from 12% to 94% over a frequency span from 1 GHz to 10 GHz, and its suitability for RH sensing is verified with a sensor prototype by implementing a resonator. The characterization results of the PVA film are applied to simulate the frequency response of the sensor, and the discrepancy between the simulation and measurement is less than 8%. The maximal average sensitivity of the fabricated sensor is 42.7 MHz/%RH.
Keywords :
atmospheric techniques; frequency response; humidity sensors; permittivity; polymer films; resonators; PVA film; RH sensing; dielectric characterization; frequency 1 GHz to 10 GHz; frequency response; humidity dependent permittivity characterization; humidity sensing applications; polyvinyl-alcohol film; relative humidity RF sensor; Capacitance; Humidity; Humidity measurement; Permittivity; Permittivity measurement; Sensitivity; Temperature measurement;
Conference_Titel :
Microwave Conference (EuMC), 2014 44th European
Conference_Location :
Rome
DOI :
10.1109/EuMC.2014.6986395
