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

Author

Afsar, M.N. ; Korolev, K.A. ; Subramanian, L. ; Tachov, I.I.

Author_Institution

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

fYear

2005

fDate

4-8 April 2005

Firstpage

893

Lastpage

894

Abstract

Complex dielectric permittivity and magnetic permeability characteristics of strontium and nickel ferrite ceramics in Q-, V- and W-band frequency range are presented. The measurements are done using broadband quasioptical millimeter wave (QOM) system with a backward-wave oscillator (BWO) as a high power source of radiation. Dielectric and magnetic parameters of the ferrite materials have been calculated by employing the best fit of the theoretical curves to the experimental transmittance spectra.

Keywords

ceramics; ferrites; magnetic permeability; magnetic permeability measurement; magnetic resonance; millimetre waves; nickel compounds; permittivity; permittivity measurement; strontium compounds; NiFe₂O₄; Q-band; Sr₄Fe₄O₁₁; V-band; W-band; backward-wave oscillator; ceramics; complex permittivity; ferrimagnets; high power radiation; millimeter wave; permeability; transmittance spectra; Ceramics; Dielectrics; Ferrites; Frequency; Magnetic materials; Millimeter wave measurements; Nickel; Permeability measurement; Permittivity; Strontium;

fLanguage

English

Publisher

ieee

Conference_Titel

Magnetics Conference, 2005. INTERMAG Asia 2005. Digests of the IEEE International

Print_ISBN

0-7803-9009-1

Type

conf

DOI

10.1109/INTMAG.2005.1463875

Filename

1463875