Defining Far Field Data from File

Import far field data from a Feko (.ffe), external ASCII or a CST far field scan (.ffs) file 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.
  4. Select one of the following:
    • To select far field data from a multi-frequency .ffe or .ffs file, select Use all data blocks. The data is interpolated for use at the operating frequency.
    • To select far field data at a specific frequency in a .ffe or .ffs file, select Use specified data block number and enter the number of the relevant data block.
    • To select a specific far field pattern in a .ffe or .dat file, select Use specified point range1.
      1. In the Start from point number field, specify the line number of the first line to read.
      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.
  5. In the Label field, specify a unique label for the far field data.
  6. Click Create to define the far field data and to close the dialog.
1 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.