Defining Calculation Requests

Define the calculation requests in CADFEKO.

  1. Define far field data.
    1. Number of theta points: 37
    2. Number of phi points: 73
    3. File name: Browse for the .ffe file
    Tip: Click on Field/Current data on the Construct tab to find all the field data types. Select Define Far Field Data.
  2. Import the spherical mode data from file.
    1. File name: Browse for the .sph file.
Define near field data.
  1. Select Define Near Field Data.
    1. Source type: Load from .efe and .hfe file.
    2. E-field file: Browse for the .efe file.
    3. H-field file: Browse for the .hfe file.
    4. Coordinate system: Spherical
    5. Radius (R): 0.45
    6. Number of points along theta: 37
    7. Number of points along phi: 73
    8. On the Workplane tab set the following:
      1. Select Custom workplane
      2. Origin: (helix_centre, helix_centre, helix_centre)
      3. U vector: (1, 0, 1).
  2. Create a far field receiving antenna request.
    1. Field data: FarFieldData1
    2. On the Workplane tab set the following:
      • Select Custom workplane
      • Origin: (helix_centre, helix_centre, helix_centre)
      • U vector: (1, 0, 1)
  3. Create a spherical modes receiving antenna request.
    1. Field data: SphericalModesData1
    2. Set the Workplane identical to that set in the far field receiving antenna request in Step 4.
    3. On the Advanced tab select Use far field approximation.
      Tip: A spherical modes source requires that no geometry breaches the far field distance of the source. Feko will give a warning if this is the case.
  4. Create a near field receiving antenna request.
    1. On the General tab select Combine individual faces
    2. Field data: NearFieldData1
  5. Set the radiated power to 100W.
    Tip: To set the radiated power, on the Source/Load tab select Power and select the option Total source power (no mismatch).