Analysis of electrically long longitudinal slots system in broad wall of rectangular waveguide

The analysis of electromagnetic wave radiation of two linear rectangular slots arbitrary oriented relative to each other is an important problem for analysis of waveguide-slot antenna arrays and also of complicated coupling elements in directional couplers, filters, and microwave power dividers. The problem of coupling the electrodynamic volumes through a system of electrically long longitudinal slots in the broad wall of a rectangular waveguide is solved by the induced magnetomotive forces method using adequate basis functions.