Coaxial resonator and measuring system for dielectric parameter measurements

Author

Nagy, Lajos ; Szalay, Zoltán

Author_Institution

Dept. of Broadband Infocommunications, BME, Budapest, Hungary

fYear

2012

fDate

26-30 March 2012

Firstpage

2149

Lastpage

2153

Abstract

Our paper presents coaxial resonator based cheap measuring system for nondestructive dielectric parameter measurements. The system is based on ISM band RF transceivers controlled by PC using microcontroller and serial UART-USB interface. The article introduces the coaxial resonator which has a resonance frequency of 780MHz without load. As opposed to sensors based on VNA our system measures the scalar scattering parameter |S₂₁| around this fixed frequency measured and the resonance frequency and the quality factor is considered to evaluate the complex dielectric constant of the measured sample. The simple and cheap measuring system makes this sensor system particularly interesting for moisture monitoring applications in industrial areas such as paper, foil and textile processing.

Keywords

dielectric measurement; dielectric resonators; microcontrollers; nondestructive testing; permittivity; radio transceivers; ISM band RF transceivers; UART-USB interface; cheap measuring system; coaxial resonator; dielectric constant; nondestructive dielectric parameter measurements; quality factor; resonance frequency; scalar scattering parameter; Dielectric measurements; Frequency measurement; Frequency shift keying; Materials; Radio frequency; Resonant frequency; Transceivers; RF measurement; contactless; material parameter; resonator;

fLanguage

English

Publisher

ieee

Conference_Titel

Antennas and Propagation (EUCAP), 2012 6th European Conference on

Conference_Location

Prague

Print_ISBN

978-1-4577-0918-0

Electronic_ISBN

978-1-4577-0919-7

Type

conf

DOI

10.1109/EuCAP.2012.6206255

Filename

6206255