Title :
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
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;
Conference_Titel :
Magnetics Conference, 2005. INTERMAG Asia 2005. Digests of the IEEE International
Print_ISBN :
0-7803-9009-1
DOI :
10.1109/INTMAG.2005.1463875
