Green´s function in the spectral domain for biaxial and uniaxial anisotropic planar dielectric structures

Green´s function solutions of the biaxial and uniaxial anisotropic layered-medium planar-structure is formulated in terms of Maxwell´s equations. Diagonalized biaxial and uniaxial permittivity tensors in the coordinate system of interest are treated. The Green´s function is found in the double Fourier transformed domain for three longitudinal-to-an-axis coupled electric-magnetic field sets applied to a simple layered structure. The approach is applicable to structures having discontinuities in two orthogonal planar directions such as patch radiators or resonators. Spectral Green´s function is usable in method-of-moment calculations assisted by Galerkin´s method.