=== Using EM.Ferma to Simulate 2D Transmission Lines ===
[[Image:Qsource16.png|thumb|400px|A field sensor and 2D solution plane defined for a microstrip line.]]
You can use [[EM.Ferma]] to perform a quasi-static analysis of multi-conductor transmission line structures, which usually provides good results at lower microwave frequencies (f < 10GHz). [[EM.Ferma]] computes the characteristics impedance Z<sub>0</sub> and effective permittivity ε<sub>eff</sub> of your TEM or quasi-TEM transmission line. The "quasi-static approach" involves two steps as described above, which [[EM.Ferma]]'s 2D Quasi-Static mode automatically performs to calculate ε<sub>eff</sub> and Z<sub>0</sub>.
Many 2D quasi-static solutions can be obtained in the same analysis, for example, when your design contains many types of transmission lines. At the end of a quasi-static analysis, the electric field components and scalar potential at the selected 2D planes will still be computed and can be visualized. In the case of a parametric sweep, the data files will contain multiple data entries listed against the corresponding variable samples. Such data files can be plotted in EM.Grid.
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[[Image:Qsource16.png|thumb|left|550px|A field sensor and 2D solution plane defined for a microstrip line.]]
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EM.Ferma's electrostatic simulation engine features a 2D solution mode where your physical model is treated as a longitudinally infinite structure in the direction normal to specified "2D Solution Plane". More than one 2D solution plane may be defined. In that case, multiple 2D solutions are obtained. A 2D solution plane is defined based on a "Field Sensor" definition that already exists in your project.
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<td> [[Image:Qsource14.png|thumb|420pxleft|480px|The 2D Static Domain static domain dialog.]] </td></tr> <tr><td> [[Image:Qsource15.png|thumb|300pxleft|A 480px|The "Add/Edit 2D Solution Plane " dialog.]] </td>
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<td> [[Image:Qsource17.png|thumb|360pxleft|480px|Electric field distribution of the microstrip line on the 2D solution plane.]] </td></tr> <tr><td> [[Image:Qsource18.png|thumb|360pxleft|480px|Electric scalar potential distribution of the microstrip line on the 2D solution plane.]] </td>
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