Diffraction by a Finite Parallel-Plate Waveguide with Sinusoidal Wall Corrugation

In microwave and optical engineering, there are many devices with periodic structures such as resonators, filters, reflector antennas, and couplers composed of gratings. Therefore the analysis of the scattering and diffraction by periodic structures is an important subject in electromagnetic theory and optics. Various analytical and numerical methods have been developed thus far and diffraction phenomena have been investigated for a number of periodic structures. It is to be noted that the theoretical analysis in the past is mainly devoted to periodic structures of infinite extent and plane boundaries. Therefore, it is important to investigate scattering problems involving periodic structures without these restrictions.