Creating a Braided Cable Shield Layer (Vance,
Tyni or Demoulin)
Create a single layer, braided (Vance,
Tyni, Demoulin) cable shield. For
a braided shield layer, the relevant braid parameters and weave metal are specified and the
Solver determines the frequency-dependent impedance (Zs +
Zt) and admittance (Yt) matrix using the Vance,
Tyni or Demoulin
formulation.
The Vance, Tyni and Demoulin formulation models
the coupling mechanism accurately due to the field penetration through the shield
apertures.
On the Cables tab, in the
Definitions group, click the Cable shield icon.
Under Shield layer(s), click
Single to create a single-layered shield.
On the Inner layer tab, on the Impedance
definition tab, from the Definition
methoddrop-down list, select one of the following:
Braided (Vance)
Braided (Tyni)
Braided (Demoulin)
Under Weave, specify the following:
From the Definition methoddrop-down list, select Weave angle
to create a braided layer using the weave angle definition:
In the Weave angle (degrees) field, enter
a value in degrees for the nominal weave angle.
In the Deviation (+/-) (degrees) field,
enter a value for the deviation of the weave angle from the
nominal weave angle in degrees.
From the Definition methoddrop-down list, select Optical
coverage to create a braided layer using the optical
coverage definition:
In the Minimum optical coverage (%)
field, enter a percentage for the minimum optical coverage for
the braided layer.
In the Number of carriers (m) field, specify the
number of carriers in the braided layer.
Under Filaments, specify the following:
In the Number of filaments (n) field, enter a
value for the number of filaments in a single carrier.
In the Diameter (d) field, enter a value for the
filament diameter.
In the Filament metaldrop-down list, select one of the following:
To create a filament consisting of PEC, select
Perfect electric conductor.
To create a filament consisting of a predefined metal, select
the metal.
To create a filament consisting of a metal, which is not yet
defined in the model, select the icon to define a metal or add a metal from the media
library.
Note: The Thickness of a Vance,
Tyni and Demoulin
shield layer is two times the filament diameter (d).
On the Inner layer tab, on the Admittance
definition tab, select Same as impedance
definition, from the Definition methoddrop-down list to use the Vance, Tynior Demoulin formulation for the admittance matrix.
Note:
The weave and filaments values are used from the impedance definition to
calculate the admittance matrix.
In the Label field, add a unique label for the cable
shield.
Click Create to create the cable shield and close
the dialog.