Defining a Coaxial Cable Using Cable Characteristics
A coaxial cable can be characterised by its characteristic impedance and propagation constant.
- On the Cables tab, in the Definitions group, click the Specified coax icon.
-
Under Cable definition, from the Definition
type
drop-down list, select Specify cable
characteristics.
-
Under Characteristics, specify the following:
- In the Magnitude of characteristic imp. (Ohm) field, enter the characteristic impedance (magnitude) for the coaxial cable.
- In the Attenuation (dB/m) field, enter the attenuation of the coaxial cable in dB/m.
- In the Velocity of propagation (%) field, enter a percentage for the velocity of propagation through the coaxial cable.
-
Under Cable definition, in the Outer
radius field, enter the outer radius of the coaxial cable.
Note: If a braided shield is applied to the coaxial cable the outer radius should be between the stretching limits for a braided shield.
-
Under Shielding, from the Shield
drop-down list, select one of the following:
- To add an outer cable shield consisting of a predefined shield, select a cable shield.
- To add an outer cable shield consisting of a shield, which is not yet defined in the model, click the icon to define a new cable shield.
-
Under Insulation layer (coating), specify the
following:
- To add a coating, select the Apply
coating check box.
- From the Medium drop-down list, specify the coating medium.
- In the Thickness field, specify the coating thickness.
- To remove the coating, clear the Apply coating check box.
- To add a coating, select the Apply
coating check box.
- In the Label field, add a unique label for the coaxial cable.
- Click Create to create the coaxial cable and to close the dialog.