FDFD based measurement of permittivity using an open-ended coaxial probe
Publish place: Journal of Communication Engineering، Vol: 10، Issue: 1
Publish Year: 1402
Type: Journal paper
Language: English
View: 166
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Document National Code:
JR_JCESH-10-1_004
Index date: 6 March 2023
FDFD based measurement of permittivity using an open-ended coaxial probe abstract
In this paper, 2D-FDFD method is applied for measuring electrical properties of dielectric materials using an open-ended coaxial probe. A SMA connector with flange is used as the coaxial probe and the reflection coefficient from probe aperture in contact with dielectric is measured by a vector network analyzer. To convert the aperture-plane reflection coefficient to dielectric permittivity, first, the coaxial probe is modeled by the 2D-FDFD method and then the genetic algorithm is employed to solve the inverse problem. The accuracy of the proposed method is investigated by measuring the dielectric properties of three known materials. The mean absolute percentage errors are below 10% and the maximum absolute percentage error is below 12%. Thus, good agreement between measured and actual values are observed.
FDFD based measurement of permittivity using an open-ended coaxial probe Keywords:
FDFD based measurement of permittivity using an open-ended coaxial probe authors
Toktam Shaterzadeh_Bojd
Computer and Communications Research Center, Ferdowsi University of Mashhad, Mashhad, Iran
Seyed Mohammad Saeed Majedi
Department of Electrical Engineering, Faculty of Engineering, Ferdowsi University of Mashhad, Mashhad, Iran