Determination of dielectric permittivity at microwaves using the eigenvalue problem

Author

Kalesinskas, V. ; Konstantinov, A.

Author_Institution

Dept. of Phys., Vilnius Univ., Lithuania

Volume

1

fYear

2000

fDate

2000

Firstpage

297

Abstract

A simple method for solving the inverse medium problem to determine the complex dielectric permittivity of a dielectric material at microwave frequencies is presented. The arbitrarily shaped dielectric sample is considered to be placed in a rectangular waveguide. The finite-difference technique and harmonic functions are applied to get a system of linear equations with measured reflection and/or transition coefficients added and solved through the eigenvalue problem. An algorithm to distinguish proper results from the system eigenvalues is defined by considering numerical solution properties. The system is tested using another method

Keywords

eigenvalues and eigenfunctions; electromagnetic wave reflection; finite difference methods; inverse problems; permittivity; rectangular waveguides; waveguide theory; complex dielectric permittivity; dielectric material; eigenvalue problem; finite-difference technique; harmonic functions; inverse medium problem; linear equations; microwave frequencies; rectangular waveguide; reflection coefficients; transition coefficients; Dielectric materials; Dielectric measurements; Eigenvalues and eigenfunctions; Equations; Finite difference methods; Microwave frequencies; Permittivity measurement; Rectangular waveguides; Reflection; System testing;

fLanguage

English

Publisher

ieee

Conference_Titel

Microwaves, Radar and Wireless Communications. 2000. MIKON-2000. 13th International Conference on

Conference_Location

Wroclaw

Print_ISBN

83-906662-3-5

Type

conf

DOI

10.1109/MIKON.2000.913928

Filename

913928