Diffraction by a symmetric material junction. II. Resolution of the muon-uniqueness

For pt.I see ibid., p.538 (1991). A Weiner-Hopf solution for the diffraction by a multilayer material-to-material junction using a GSTC (generalized sheet transition condition) simulation of the multilayer slab was previously presented. This solution was in terms of unknown constants, and it was shown that these are dependent on the physical properties of the junction. Consequently, an approach for determining the solution constants is to enforce tangential field continuity across the junction, which implies a knowledge of the fields internal to the discontinuous slab, not yielded from the Wiener-Hopf solution. To overcome this, the authors use a model expansion, making it possible to recast the previously obtained Weiner-Hopf solution in a form permitting the identification of the fields internal to the slab. By enforcing field continuity across the junction, a set of linear equations for the unknown constants can be generated.<>