Complex Dielectric Permittivity Measurements Using a Rational Functional Method with Arbitrary Open-Ended Coaxial Probes

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Abstract

In this paper, we present a rational function method (RFM) in order to measure complex dielectric parameters (CDP) with an open ended coaxial probe. The scattered field data is measured on the aperture of the open ended coaxial probe. Then admittance of material under test (MUT) is calculated and used as the data of the inversion scheme. The relation between the CDP and the admittance of MUT is performed via RFM. RFM presents this relation as a polynomial function and the root of polynomial consist of CDP of MUT. Although these approximation is well known and applied in previous works, the determination of required model parameters for arbitrary open ended coaxial probes (different filled coaxial lines and diameters) is detailed. In addition, these coefficients for an specific commercial probe (DAK) is found and given in tables. Moreover, validation of these coefficients are checked by comparing the rational approximation with integral formula of impedance. At the end, CDP of a reference liquid dimethyl sulfoxide (DMSO) is determined from an experimental setup and results are compared with literature. The results demonstrated that RFM method is capable of retived CDP of MUT by using the presented coefficients with DAK probes.

Original languageEnglish
Title of host publication2021 29th Telecommunications Forum, TELFOR 2021 - Proceedings
PublisherInstitute of Electrical and Electronics Engineers Inc.
ISBN (Electronic)9781665425841
DOIs
Publication statusPublished - 2021
Event29th Telecommunications Forum, TELFOR 2021 - Virtual, Belgrade, Serbia
Duration: 23 Nov 202124 Nov 2021

Publication series

Name2021 29th Telecommunications Forum, TELFOR 2021 - Proceedings

Conference

Conference29th Telecommunications Forum, TELFOR 2021
Country/TerritorySerbia
CityVirtual, Belgrade
Period23/11/2124/11/21

Bibliographical note

Publisher Copyright:
© 2021 IEEE.

Keywords

  • Complex Dielectric Permittivity measurements
  • Open-Ended Coaxial Probe
  • RFM

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