Three systems of waveguide discontinuities are considered. The first system is that of multiple apertures of arbitrary shape in the transverse plane between two cylindrical waveguides. The second system consists of metallic obstacles in a rectangular waveguide that are uniform along the narrow side of waveguide but are otherwise of arbitrary shape and thickness, i.e., a system of inductive posts. The third system consists of metallic obstacles in a rectangular waveguide that are uniform along the broad side of the waveguide, but are otherwise of arbitrary cross section and thickness, i.e., a system of capacitive posts. Common between the first and second systems are the inductive windows and strips in a rectangular waveguide, and between the first and third systems are the capacitive windows and strips in a rectangular waveguide.

The dyadic Green's function for an electric current source placed in a rectangular waveguide is derived using a magnetic vector potential approach. A complete solution for the electric and magnetic fields including the source location is obtained by simple differentiation of the vector potential around the source location. The simple differentiation approach which gives electric and magnetic fields identical to an earlier derivation is overlooked by the earlier workers in the derivation of the dyadic Green's function particularly around the source location. Numerical results obtained using the Green's function approach are compared with the results obtained using the Finite Element Method (FEM). Deshpande, M. D. Langley Research Center NAS1-19341; RTOP 522-33-11-02

This book provides the reader with the possibility of rapid study and application of methods of computer analysis of electrodynamic problems. The authors address the development of analytical methods to solve the problems of diffraction of waveguide electromagnetic waves on slot coupling holes. All the authors have experience in the field and the topics addressed are based on their original research results. The book is written in a laconic style and is visually accessible.