Microstrip transmission lines on arbitrarily oriented biaxial media

In this analysis, the effective permittivity and the current distribution are calculated for a microstrip transmission line placed on a conductor-backed arbitrarily-oriented biaxially anisotropic slab. The microstrip transmission line parameters are calculated using a spectral domain formulation in conjunction with a method of moments technique. The analysis defines the search limits used for locating the bound mode propagation constant, establishes the effects that the biaxial slab orientation has on the effective permittivity, and reveals asymmetries in the transverse current distribution when the principal coordinates of the medium are not aligned with those of the transmission line structure.