Frequency dependent finite‐difference–time‐domain (fd)2td formulation applied to ferrite material

摘要

AbstractWhen subjected to a constant magnetic field, ferrites exhibit anisotropic constitutive parameters. This anisotropy can be described in the frequency domain by using a permeability tensor μ(ω) instead of the usual scalar permeability. This article introduces a new method to analyze saturated ferrite structures by a FDTD algorithm where the convolution between the permeability tensor μ(t)= F−1(μ(ω)) and the magnetic field H(t) = F−1(H(ω)) are to be calculated. Results are obtained for a two‐dimensional problem and are compared with those given by direct differential FDTD algorithm 1 and a mode‐matching method 2. © 1994 John W