Complex permittivity and permeability measurements of ferrimagnets at Millimeter waves with high power sources

Author

Afsar, Mohammed N. ; Korolev, Konstantin A. ; Subramanian, Lakshmi ; Tkachov, Igor I.

Author_Institution

Dept. of Electr. & Comput. Eng., Tufts Univ., Medford, MA, USA

Volume

41

Issue

10

fYear

2005

Firstpage

3457

Lastpage

3459

Abstract

We present complex dielectric permittivity and magnetic permeability characteristics of strontium and nickel ferrite ceramics in Q-, V-, and W-band frequency range. The measurements have been done using broad-band quasi-optical millimeter wave spectrometer with backward-wave oscillator as a high power source of coherent radiation. Dielectric and magnetic parameters of the ferrite ceramic materials have been calculated by employing the best fit of the theoretical curves to the experimental transmittance spectra.

Keywords

ferrites; ferroelectric ceramics; magnetic permeability measurement; millimetre wave measurement; permittivity measurement; backward wave oscillator; broad band quasi-optical millimeter wave spectrometer; complex permittivity measurements; dielectric parameters; dielectric permittivity; ferrimagnets; ferrite ceramic; magnetic parameters; magnetic permeability measurement; millimeter waves; Ceramics; Dielectrics; Ferrites; Frequency; Magnetic materials; Millimeter wave measurements; Nickel; Permeability measurement; Permittivity; Strontium; Ferrimagnetic materials; millimeter wave measurements; permeability; permittivity;

fLanguage

English

Journal_Title

Magnetics, IEEE Transactions on

Publisher

ieee

ISSN

0018-9464

Type

jour

DOI

10.1109/TMAG.2005.854881

Filename

1519338