Modeling Overview
Modeling 
2D(TL) Modeling
The central method of CST CABLE STUDIO is based on classical transmission
line theory. Hereby, the geometric and material characteristics of a cable
are transformed into an equivalent circuit that can be simulated within
a circuit simulator in time and frequency domain.
First, the user has to decide which cables should be taken into account
for the generation of the equivalent circuits. This has to be done inside
the Selection tab. In a second
step the cable harness will be divided into a finite number of straight
segments. Such segments already exist by definition when a harness was
created manually. But after importing a complex harness via the Nastran
import interface (see Cable
Data Import ) this segmentation has to be done by an automatic procedure.
After the segmentation, each segment has to be
checked for any metallic shapes surrounding the cable assembly. All cables
in a segment, in combination with additional metallic shapes, define its
cross-section. The whole process is called Meshing.
In a third step the primary transmission line parameter per unit length
(R', L', C', G') will be calculated
from each segment by a static 2D field solver. After that, each segment
will be transformed into an equivalent circuit and finally all circuits
will be connected together to one single electrical model representing
the whole cable. This process is called Modeling.
