Pulsed 2D ElectroMagnetic Field Propagation in a Rectangular Waveguide

Closed-form space-time expressions are derived for the two-dimensional electromagnetic (EM) field propagating in a rectangular waveguide. The pulsed EM field inside the waveguide is activated by an electric line current source applied across the rectangular cross section. This field is written as a superposition of time-domain (TD) constituents denoted as generalized rays, progressing along the waveguide via multiple reflections against its conducting walls. Illustrative numerical examples are presented. The thus constructed propagating field is compared against results available in literature, demonstrating the effectiveness and accuracy of the generalized-rays approach.