=== Running a Periodic MoM Analysis ===
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Once you designate your planar structure to be treated as "periodic" in EM.Picasso's Periodicity Settings dialog, the Planar MoM simulation engine will use a spectral domain solver to analyze it. In this case, the dyadic Green's functions of periodic planar structure take the form of doubly infinite summations rather than integrals.
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Click here to learn more about the theory of [[Planar_Method_of_Moments#Periodic_Planar_MoM_Simulation| Periodic Green's functions]].
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You run a periodic MoM analysis just like an a period MoM simulation from EM.Picasso's Run Dialog. Here, too, you can run a single-frequency analysis or a uniform or adaptive frequency sweep, or a parametric sweep, etc. Similar to the aperiodic structures, you can define several observables for your project. If you open the Planar MoM Engine Settings dialog, you will see a section titled "Infinite Periodic Simulation". In this section, you can set the number of Floquet modes that will be computed in the periodic Green's function summations. By default, the numbers of Floquet modes along the X and Y directions are both equal to 25, meaning that a total of 2500 Floquet terms will be computed for each periodic MoM simulation.
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