Creating the Model

Create the model in CADFEKO. Define any ports and sources required for the model. Specify the operating frequency or frequency range for the model.

The model of the horn is not constructed but provided.
Open Pyramidal_Horn.cfx.
  • The waveguide port is placed on the YZ plane and the horn is centered with respect to these axes.
  • Two planes of symmetry are used in the model.
  • The phase centre of the horn is located inside the flare. The far field is calculated with the offset axis origin at X = -21.6 cm.
    • The phase centre is required for accurate placement of the equivalent sources, but this calculation is beyond the scope of this example.
    • The phase centre varies over frequency. However, for the narrow bandwidth of this example, this step is ignored.
Tip: The Calculate the far field phase centre script1 is available on Altair Connect.
1 A stand-alone script that can be used to calculate the phase centre of a calculated far field using the Lua scripting language in POSTFEKO.