A. Sanada et al., Full-wave finite-difference time-domain formulation for gyromagnetic ferrite media magnetized in arbitrary direction, IEICE TR EL, E84C(7), 2001, pp. 931-936
In this paper, we propose a full-wave finite-difference time-domain formula
tion for ferrite magnetized in arbitrary direction solving the equation of
motion uf the magnetization vector including magnetic loss with Maxwell's e
quation consistently. The FDTD formulation and algorithm for ferrite are de
rived from Gilbert's equation without making and. restrictions on the direc
tion of the magnetization. In order to confirm the validity and generality
of the the axial independence of the formulation, full-wave analyses for a
ferrite filled waveguide resonator are demonstrated and compared with theor
etical results: given from the conventional Polder's permeability tenser. T
he FDTD results of the quality factor and tile resonant frequency of the re
sonators magnetized in off-axial direction agree very. well with the theore
tical results, and validity and generality of the formulation are confirmed
.