Title :
A calibration technique for measuring the complex permittivity of materials with planar transmission lines
Author :
Roelvink, J. ; Trabelsi, S.
Author_Institution :
Agric. Res. Service, Richard B. Russell Agric. Res. Center, United States Dept. of Agric., Athens, GA, USA
Abstract :
A simple two-standard calibration procedure for determining the permittivity of a material from the propagation constant measured with planar transmission lines is presented. The suitability of this procedure is demonstrated by using a coplanar waveguide transmission-line sensor to measure the permittivity of five liquids, covering a wide range of complex permittivity. The results agree closely with expected values when the radiation and conductor losses are small. This technique allows the permittivity of materials to be measured without knowing the planar transmission-line dimensions apart from the line lengths.
Keywords :
calibration; coplanar transmission lines; coplanar waveguides; permittivity measurement; transmission line theory; conductor losses; coplanar waveguide transmission-line sensor; material complex permittivity measurement; planar transmission-line dimensions; propagation constant; radiation losses; two-standard calibration procedure; Calibration; Coplanar waveguides; Materials; Permittivity; Permittivity measurement; Transmission line measurements; Dielectric properties; calibration procedures; permittivity measurements; planar transmission lines;
Conference_Titel :
Instrumentation and Measurement Technology Conference (I2MTC), 2013 IEEE International
Conference_Location :
Minneapolis, MN
Print_ISBN :
978-1-4673-4621-4
DOI :
10.1109/I2MTC.2013.6555653
