even higher frequency and source has size in both x and y dirs
Added the modal calculation control file
placed source slightly off center, evaluate harminv at origin and at source point
Trying to figure out how to make sources with opposite phase
Succesfully have two sources out of phase with each other
Goal 0. Donut Mode Excited
Goal 0. Donut Mode Excited.
GOAL 1. Mode settles in.
Goal 1. Propagation of fundamental mode just above cutoff frequency.
Goal 2. Below cutoff frequency does not propagate.
THz propagation, but waveguide needs to be longer and time stipe needs to be smaller