Define Layer Properties

This option defines the shield layer properties by either a manual definition in the .pre file or by loading from file.



Figure 1. The SD - Cable shield layer definition dialog, set to Define properties definition.

Parameters:

Shield definition label
A name for the shield layer definition.
Impedance
Select this option to include transfer and surface impedance definition.
Admittance
Select this option to include the transfer admittance definition.
Define in the *.pre file
The frequency dependent shield parameters based on measured transfer impedance, surface impedance and transfer admittance data can be specified in the .pre file.
Interpolation method
Choose an interpolation method for the data:
  • Default
  • Constant
  • Linear
  • Cubic spline
  • Rational (Thiele)
Number of Zt, Zs or Yt points
Total number of frequency points.
Frequency
The frequency at which the transfer impedance, surface impedance or transfer admittance is specified in the .pre file.
Zt, Zs or Yt Magnitude
The magnitude of the transfer impedance, surface impedance or transfer admittance defined in the .pre file.
Zt, Zs or Yt Phase
The phase of the transfer impedance, surface impedance or transfer admittance defined in the .pre file.
Load from file
The file format used when importing the shield properties from file is described in Load Shield Properties from a .XML File.
Surface Impedance - Solid (Metallic material)
PEC
Select this option to set the shield of the filaments to PEC.
Material label of metallic material
The label of the material (as defined in the DI card) to be used for the shield.
Surface Impedance (Zs = Zt)
Low frequency braid-approximation the data defined for the transfer impedance is also used for the surface impedance definition.