Electromagnetic characterization of barium ferrite thick film samples in the KP band

Author

Jakab, László ; Berceli, Tibor

Author_Institution

Dept. of Broadband Inf. Commun. & EM Theor., Budapest Univ. of Technol. & Econ., Budapest, Hungary

fYear

2011

fDate

10-13 Aug. 2011

Firstpage

118

Lastpage

121

Abstract

A method for the broadband measurement of the complex permittivity of barium ferrite (BaF) thick film samples in a partially filled rectangular waveguide is presented. The material characterization is based on the measurement of the reflection and the transmission coefficients of the rectangular waveguide containing the demagnetized ferrite sample. We present the detailed numerical method for the calculation of the complex permittivity from the measured scattering matrix. First the propagation constant is deduced from the scattering parameters followed by the determination of the cutoff wavenumber for the partially filled section of the waveguide. Finally, the material parameters are calculated based on the analytical solution of the partially filled waveguide. The method is verified by 3-D electromagnetic simulation tools and by reference measurements on known samples.

Keywords

S-parameters; barium compounds; electromagnetic wave reflection; electromagnetic wave transmission; permittivity measurement; rectangular waveguides; thick films; 3D electromagnetic simulation tools; barium ferrite thick film samples; broadband measurement; complex permittivity; cutoff wavenumber; demagnetized ferrite sample; electromagnetic characterization; material characterization; numerical method; partially-filled rectangular waveguide; propagation constant; reflection coefficient measurement; scattering matrix measurement; transmission coefficient measurement; Electromagnetic waveguides; Materials; Microwave measurements; Microwave theory and techniques; Permittivity; Permittivity measurement; Propagation constant;

fLanguage

English

Publisher

ieee

Conference_Titel

Computational Electromagnetics International Workshop (CEM), 2011

Conference_Location

Izmir

Print_ISBN

978-1-4577-1685-0

Type

conf

DOI

10.1109/CEM.2011.6047343

Filename

6047343