Title :
Microwave permittivity measurement of polymers by deposition on a coplanar wave guide
Author :
Rolain, Y. ; Barel, A. ; Gubbels, E. ; Van Moer, W.
Author_Institution :
Dept. ELEC/TW, Vrije Universiteit Brussel, Brussels, Belgium
Abstract :
A balance is made between accuracy and cost in the wideband (45 MHz-18 GHz) determination of the permittivity of a polymerised elastic coating. It is shown that the combination of S-parameters measurements of 2 coplanar wave guides (CPW) before and after coating with a thick layer of the material under test (MUT) and the use of an analytical expression for the calculation of the permittivity of the lines, can lead to a ´best bargain´ solution. Expensive narrow-banded methods fall out of the scope for this application.
Keywords :
coplanar waveguides; dielectric materials; microwave measurement; nondestructive testing; permittivity measurement; polymers; 4.5E7 to 1.8E10 Hz; S-parameters measurements; coplanar wave guide; deposition; line permittivity; material under test; microwave permittivity measurement; polymerised elastic coating; polymers; wideband permittivity determination; Coatings; Conducting materials; Coplanar waveguides; Dielectric materials; Materials testing; Measurement uncertainty; Permittivity measurement; Polymers; Propagation constant; Transmission lines;
Conference_Titel :
Instrumentation and Measurement Technology Conference, 2004. IMTC 04. Proceedings of the 21st IEEE
Print_ISBN :
0-7803-8248-X
DOI :
10.1109/IMTC.2004.1351057
