Plot the magnitude of S21, S31 and S41 (in dB)
on a Cartesian graph.
Figure 1. S21, S31 and S41 of the microstrip
coupler.
Compare the results with the literature reference,
On the design of planar microwave components using multilayer structures”, by
W. Schwab and W. Menzel, IEEE Trans. MTT, vol. 40, no. 1, Jan 1992, pp. 67-72, Fig
9.
Note: The measured data from the referenced article are in good agreement
with the simulated results. Any differences are most likely due to uncertainties
regarding the model dimensions or dielectric properties.
