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Also, note that the wizard defined a vertical X-directed field sensor observable called "FS1", which is centered at (0, 0, 0). Next, right-click on the '''2D Solution Planes''' under the "Computational Domain" section of the navigation tree and select '''2D Domain Settings...''' from the contextual menu. This opens up [[EM.Ferma]]'s "2D Static Domain Settings" dialog. At the top of the dialog, you will a checked box labeled "Treat Structure as Longitudinally Infinite across Each Solution Plane Defined Below". Then in the solution planes table, you see one entry called "SP1", of quasi-static type, which is associated withe field sensor "FS1". Select and highlight "SP1" in the table and click the {{key|Edit}} button of the dialog.
{{Note| Before you can define a 2D solution plane, you must first define a field sensor observable.}}
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A new dialog titled "Add/Edit In the 2D Solution PlaneStatic Domain table, you see one entry called " opens up. It FS1", of quasi-static type, which is here in this dialog where you associate a new solution plane associated with an existing the field sensor plane"FS1". By checking Select and highlight "FS1" in the table and check the box labeled "Perform Reduce the 3D Domain to a 2D Quasi-Static SimulationSolution Plane", you instruct at the top of the dialog. Then press "OK". This procedure instructs [[EM.Ferma]] to calculate the characteristics impedance and effective permittivity of your 2D transmission line structure as described in the beginning of this tutorial lesson.
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<td> [[Image:Ferma_L7_Fig6_newB.png|thumb|left|480px|EM.Ferma's "Add/Edit 2D Solution PlaneStatic Domain" dialog.]] </td>
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