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

fYear

2013

fDate

6-9 May 2013

Firstpage

1445

Lastpage

1448

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;

fLanguage

English

Publisher

ieee

Conference_Titel

Instrumentation and Measurement Technology Conference (I2MTC), 2013 IEEE International

Conference_Location

Minneapolis, MN

ISSN

1091-5281

Print_ISBN

978-1-4673-4621-4

Type

conf

DOI

10.1109/I2MTC.2013.6555653

Filename

6555653