A moment method is used to plot the electromagnetic field of an inductive window in a TE10 -mode rectangular waveguide. Green's dyadic functions are derived based on Tai's approach, which is a modified form of Hansen's vector wave functions. Based on the computed electric fields, the S matrix and the equivalent aperture reactance of the waveguide window are calculated. This calculation agrees with the previously published closed-form results of Marcuvitz.
Natzke, John R.; Wolski, Mark R.; and Ishii, Thomas Koryu, "Electromagnetic Field Plot of an Inductive Window by the Moment Method" (1991). Faculty Publications - Department of Electrical Engineering and Computer Science. 20.