w_wg 2.286[cm] "Waveguide width"
h_wg 1.016[cm] "Waveguide height"
d_iris 0.3[cm] "Iris thickness"
l_iris1 0.695[cm] "Iris length 1"
l_iris2 0.53[cm] "Iris length 2"
spacing 2.03[cm] "Iris spacing distance"