Defining a Coaxial Cable Using Cable Characteristics

Define a coaxial cable by its characteristic impedance and propagation constant.

  1. On the Cables tab, in the Definitions group, click the  Coaxial icon.
  2. Under Cable definition, from the Definition type drop-down list, select Specify cable characteristics.

    Figure 1. The Create Coaxial Cable dialog (Specify coaxial cable characteristics).
  3. 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.
  4. 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 inside the stretching limits for a braided shield.
  5. 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.
  6. Under Insulation layer (coating), specify the following:
    • To add a coating, select the Apply coating check box.
      1. From the Medium drop-down list, specify the coating medium.
      2. In the Thickness field, specify the coating thickness.
    • To remove the coating, clear the Apply coating check box.
  7. In the Label field, add a unique label for the coaxial cable.
  8. Click Create to create the coaxial cable and to close the dialog.