Realization of Generalized Soft-and-Hard Boundary

The classical soft-and-hard surface boundary conditions have previously been generalized to the form a • E = 0 and b • H = 0 where a and b are two complex vectors tangential to the boundary.A realization for such a boundary is studied in terms of a slab of special wave-guiding anisotropic material.It is shown that analytic expressions can be found for the material parameters and thickness of the slab as functions of the complex vectors a and b.Application of a generalized soft-and-hard boundary as a polarization transformer is studied in detail.