Near-field broadside coupling between two H-plane sectoral horns

The near-field broadside coupling between a pair of two-dimensional H-plane sectoral horns is derived using the method of overlapping regions in conjunction with Schwarz´s procedure to solve the resulting integral equations by numerical iterations as well as the generalized scattering matrix technique. The primary advantage of the method is that it allows an arbitrary initial assumption of the aperture field distribution and reasonably corrects it in order to take into account the multiple scattering effects. It is shown that only a few iterations are required for typical coupling geometry and that the number of iterations and the convergence of the series´ computations are improved for shorter horns and closer separation distances. Graphical results for the aperture field distributions for specific geometries are presented.