Title :
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
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;
Journal_Title :
Magnetics, IEEE Transactions on
DOI :
10.1109/TMAG.2005.854881
