Defining Far Field Data from File

Import far field data from a Feko file (.ffe), external ASCII file or a CST far field scan (.ffs) to create a far field data definition. Use the far field data when defining an equivalent source or receiving antenna.

The far field must be defined in spherical coordinates.
  1. On the Construct tab, in the Define group, click the  Field/current data icon. From the drop-down list select  Define far field data.


    Figure 1. The Define far field data dialog.
  2. Select one of the following file types to import:
    • Load field data from Feko Solver (*.ffe) file
    • Load field data from an external data file
    • Loaf field data from a CST far field scan (*.ffs)
  3. In the File name field, browse to the file location.

Far field patterns are typically frequency dependent and models with radiation pattern sources usually have only a single solution frequency. If the radiation pattern is calculated using a frequency sweep in Feko, the .ffe file contains multiple patterns.

  1. In the Start from point number field, specify where the first line occurs in the file for the required pattern.
    For example, if a far field pattern was calculated for 50 field directions in a frequency sweep, the pattern for the third frequency starts at point number 101.
  2. In the Number of theta points field, specify the number of theta points used in the imported far field.
  3. In the Number of phi points field, specify the number of phi points used in the imported far field.

The data block number corresponds to the far field data at a specific frequency.

  1. In the Use data block number field, specify the data block number that corresponds to the far field data at a specific frequency.
  2. In the Label field, specify a unique label for the far field data.
  3. Click Create to define the far field data and to close the dialog.