[[EM.Picasso]] usually generate two types of data: 2D and 3D. Examples of 2D data are S/Z/Y parameters and polar radiation patterns. 2D data are graphed in <b>EM.Grid</b>. Examples of 3D data are electric and magnetic current distributions, near field distributions and 3D radiation patterns. 3D data are visualized in [[EM.Picasso]]’s project workspace, and the plots are usually overlaid on the physical structure.
To plot the current distributions, go to the '''Current Distributions''' section of the navigation tree. Under “PEC_1”“PATCH_PEC”, you will see a total of 14 nodes. These include magnitude and phase plots for each of the three components of the electric surface current density (<b>J</b>) and magnetic surface current density (<b>M</b>), plus two additional plots for total electric and total magnetic currents. In this project, your physical structure does not contain magnetic currents (no slot traces). Therefore, all the magnetic current nodes contain zero-value plots. The plot of total electric current (J<sub>TOT</sub>) distribution should look like the figure below. Notice the visible standing wave pattern that has been formed on the feed line of your patch antenna. Also, remember that your microstrip feed line was extended to 2λ<sub>eff</sub> during the simulation. These standing wave data were used by the PMOM engine to calculate the S11 parameter using Prony’s method of exponential approximation.
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