UTD diffraction coefficient for dielectric plate junctions

An approximate uniform geometrical theory of diffraction (UTD) coefficient is determined for the junction between two material plates. It is based on an extension of the heuristic diffraction coefficient for knife-edged plates. The geometry is illustrated. The wedge angle can be arbitrarily defined. The source and receiver can be on the same or opposite sides of the plates. This result is useful for many applications. It can be used to determine the diffraction of waves around and through building corners. It can also be used in analysing radomes. The theory is validated by comparisons to a two dimensional moment method solution.