On the use of SDA for the analysis of boxed planar lines with complex media

This paper discusses the conditions under which the spectral-domain approac h (SDA) can be applied to the analysis of boxed planar lines when complex m aterials (anisotropic dielectrics, ferrites, magnetoplasmons, chiral media, and so on) are used as substrates. It will be shown that whereas SDA can a lways be efficiently applied to study laterally open structures, the simult aneous presence of lateral boundary conditions and nonisotropic materials r equires further study. Thus, the symmetry properties of the constitutive dy adics that makes possible a rigorous application of the SDA to those kinds of structures will be reported in this paper.