Theoretical considerations for finding anisotropic permittivity in layeredferroelectric/ferromagnetic structures from full-wave electromagnetic simulations

A full-wave integral-equation Green's function code in the spectral domain has been implemented using the finite Fourier transform consistent with com plex media layered structures modeled in a cross-sectional region. The basi s function set describing the strip currents or slot fields at the interfac e is able to handle asymmetric field distribution due to the intrinsic asym metry caused hy the material tensors. Theoretical issues related to determi ning the permittivity or permeability tensors from the propagation constant are covered in mathematical generality for rotated systems or arbitrary bi as field orientations. A dispersion diagram for static electric-field-induc ed anisotropy in a ferroelectric loaded multi layered microstrip structure is provided. and a multistep computational process of de-embedding the perm ittivity from the propagation constant values is demonstrated.* (C) 2001 Jo hn Wiley & Sons, Inc.