</table>
== The 2D Electrostatic Quasi-Static Simulation Mode==
=== Using EM.Ferma to Simulate 2D Transmission Lines ===Â 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 "2D 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>. Â To perform a transmission line simulation, first draw your structure in the project workspace just like a typical 3D structure. Define a "Field Sensor" observable in the navigation tree so as to capture the cross section of your structure as your desired transmission line profile.
Next, define a "2D Solution Plane" in the navigation tree based on your existing field sensor. When defining the 2D plane, check the box labeled "Perform 2D Quasi-Static Simulation". If an analysis is run with this option checked, the characteristic impedance Z<sub>0</sub> and effective permittivity ε<sub>eff</sub> will be computed for the corresponding 2D Solution Plane. The results are written to two output data files named "solution_plane_Z0.DAT" and "solution_plane_EpsEff.DAT", respectively, where "solution_plane" is the default name of your 2D plane.