Diffraction by a Semi-Infinite Parallel-Plate Waveguide with Partial Material Loading: A Combined Wiener-Hopf and MRCT Solution

The diffraction by a semi-infinite parallel-plate waveguide with partial material loading is rigorously analyzed using the Wiener-Hopf technique. In solving the Wiener-Hopf equations, the Modified Residue Calculus Technique (MRCT) is applied to obtain a highly accurate solution. The scattered field inside and outside the waveguide is evaluated explicitly. Representative numerical examples on the radar cross section are presented for various physical parameters and the scattering characteristics of the waveguide are discussed in detail.