Characterised Surface with RL-GO

Define a characterised surface that uses the .tr file.

Define a large rectangular plate where the characterised surface medium is set:

  1. Create a new CADFEKO model.
  2. Change the model unit to mm.
  3. Define a new variable d=15.2 (this is the size of the FSS element used in Periodic Boundary Conditions for FSS Characterisation).
  4. Define a rectangular plate.
    • Base centre: (0, 0, 0).
    • Width = d*31.
    • Length = d*31.
    • The plate size is equivalent to 31x31 FSS elements.
  5. Create a Characterised surface medium using the .tr file that was created in Creating the FSS Model and Writing the .TR File.
  6. Set the solver method for the rectangular plate to use RL-GO.
    Tip: Open the Modify Face dialog and click the Solution tab. From the Solve with special solution method list, select Ray launching - geometrical optics (RL-GO).
  7. Apply the characterised surface to the rectangular plate.
    1. Medium: CharacterisedSurface1
    2. U-vector:
      1. Start point: (0, 0, 0)
      2. End point: (1, 0, 0)
      Tip: Open the Modify Face dialog and click the Solution tab.
      Note: Defining the U-Vector determines the orientation of the characterised surface elements on the face. In this example, the original orientation used for the FSS simulation is unchanged so the U-Vector is defined as X directed.
  8. Set the Solution frequency to 10 GHz.
  9. Define a plane wave source that loops over multiple directions with θ from 0 to 180° with and increment of 6°.