Facta universitatis - series: Electronics and Energetics 2021 Volume 34, Issue 1, Pages: 141-156
https://doi.org/10.2298/FUEE2101141D
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High-accuracy quasistatic numerical model for bodies of revolution tailored for RF measurements of dielectric parameters
Đorđević Antonije (University of Belgrade, School of Electrical Engineering, Belgrade, Serbia + Serbian Academy of Sciences and Arts, Belgrade, Serbia)
Olćan Dragan 
(University of Belgrade, School of Electrical Engineering, Belgrade, Serbia), olcan@etf.rs
Petrović Jovana (University of Belgrade, School of Electrical Engineering, Belgrade, Serbia)
Obradović Nina (Institute of Technical Sciences of the Serbian Academy of Sciences and Arts, Belgrade, Serbia)
Filipović Suzana (Institute of Technical Sciences of the Serbian Academy of Sciences and Arts, Belgrade, Serbia)
We have developed rotationally symmetrical coaxial chambers for measurements
of dielectric parameters of disk-shaped samples, in the frequency range from
1 MHz to several hundred MHz. The reflection coefficient of the chamber is
measured and the dielectric parameters are hence extracted utilizing a
high-accuracy quasistatic numerical model of the chamber and the sample. We
present this model, which is based on the method of-moments solution of a
set of integral equations for composite metallic and dielectric bodies. The
equations are tailored to bodies of revolution. The model is efficient and
accurate so that the major contribution of the measurement uncertainty comes
from the measurement hardware.
Keywords: dielectric measurements, electromagnetic modeling, method of moments, bodies of revolution