Apply two waveports, one to to the end of the waveguide, then simulate.
The phase of S21 will tell you how long the transmission line is, within one wavelength. To find out how many integer number of wavelengths there are, simply plot the electric field and count maxima.
Apply two waveports, one to to the end of the waveguide, then simulate.
The phase of S21 will tell you how long the transmission line is, within one wavelength. To find out how many integer number of wavelengths there are, simply plot the electric field and count maxima.