FEM Distributed Line Ports

The finite element method (FEM) distributed line port defines a Norton equivalent circuit port in a FEM region. The two terminals of the port are formed by two N-point polylines, defining the start and end points, respectively, of N discrete lines.​

When a current source (I) is applied to the port, the current is divided uniformly between the N discrete lines of the port (discrete current values I/N).​

When a load (Z) is applied to the port, the impedance is applied as parallel loads uniformly distributed over the N discrete lines (discrete load values ZxN).​

Results: Circuit-based result quantities are calculated and returned for the port treated as a lumped element. The voltage across the port terminals is computed as the average of the voltages across the discrete lines.​

Warning: If the resulting solution voltages at the discrete lines deviate substantially from the average voltage, the usage of the FEM distributed line port results is not suitable for incorporation into network parameter analysis.
Figure 1. The display of the FEM distributed line port in the 3D view.