Open AccessHigh-accuracy quasistatic numerical model for bodies of revolution tailored for RF measurements of dielectric parameters
Author(s) -
A.R. Djordjević,
Dragan I. Olćan,
Jovana Petrović,
Nina Obradović,
Suzana Filipović
Publication year - 2021
Publication title -
facta universitatis. series electronics and energetics/facta universitatis. series: electronics and energetics
Language(s) - English
Resource type - Journals
eISSN - 2217-5997
pISSN - 0353-3670
DOI - 10.2298/fuee2101141d
Subject(s) - quasistatic process , dielectric , coaxial , reflection coefficient , range (aeronautics) , materials science , method of moments (probability theory) , computational physics , optics , mechanics , acoustics , physics , engineering , mathematics , electrical engineering , composite material , optoelectronics , thermodynamics , statistics , estimator
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.