Calculating the Far Field

Once the current distribution on the structure has been calculated, the far-field can be computed within the angular ranges specified in the Far-Field panel of the Setup tab.

To calculate the far-field:

• Navigate to Run > Run Far-Field in the main menu (see Fig. 1).
  • This command is enabled only after the current distribution has been calculated.

Tip

To sequentially and automatically calculate both the current distribution and the far field, click the Run Currents and Far-Field (F10) button on the toolbar.

Note

When an incident plane wave is used as the excitation, the calculated far-field results represent the scattered field. The resulting radiation pattern is the scattered field pattern, observed in the far-field region where the scattered field amplitude decays with the inverse of the distance (1/r), and the scattered power density decays with the inverse square of the distance (1/r²) from the structure.