WAVE-PROPAGATION IN HETEROGENEOUS ANISOTROPIC MAGNETIC-MATERIALS

In order to examine guided wave propagation in unsaturated magnetized materials, it seems reasonable to consider an alternation of layers wi th antiparallel magnetization in a rectangular waveguide. This approac h is coherent with Schlomann's model [1] which considers partially mag netized ferrites as an alternation of antiparallel coaxial cylinders. The finite-difference time-domain (FDTD) method had been used in the c ase of an homogeneously filled rectangular waveguide. It is adapted he re to a guide partially filled with two antiparallel magnetization lay ers. The modification of the FDTD algorithm at the air/ferrite and fer rite/ferrite interfaces is presented. Results are compared with the on es obtained by a mode-matching technique.