Creating the HRRP Model

Execute the CF_generate_high_resolution_range_profile.lua application macro in CADFEKO to set up a model and generate the data for a high-resolution range profile.

  1. Open the Cylinder_HRRP.cfx in CADFEKO.
  2. Execute the CF_generate_high_resolution_range_profile.lua application macro in CADFEKO.
    The HRRP generation dialog is displayed.


    Figure 1. The HRRP generation dialog.
  3. Under Definition method, select one of the following to set up a high-resolution range profile:
    • Specify frequency (center) and range (ambiguity, resolution).
    • Specify frequency (center, bandwidth, number of samples).
    • Specify frequency (start, end, number of samples).
  4. Enter the required parameters.
    • If Specify frequency (center) and range (ambiguity, resolution) was selected, specify the following parameters under Frequency and Down-range:
      • Enter the Center frequency (Hz).
      • Enter the Resolution (m).
      • Enter the Ambiguity (m).
    • If Specify frequency (center, bandwidth, number of samples) was selected, specify the following parameters under Frequency:
      • Enter the Center frequency (Hz).
      • Enter the Bandwidth (Hz).
      • Enter the Number of frequency samples.
    • If Specify frequency (start, end, number of samples) was selected, specify the following parameters under Frequency:
      • Enter the Start frequency (Hz).
      • Enter the Start frequency (Hz).
      • Enter the Number of frequency samples.
  5. [Optional] Click Calculate to view the other dependent parameters.
  6. Under Phi, specify the plane wave source information for the phi component of the plane wave.
    • Enter the Start (deg) angle in degrees.
    • Enter the Increment to specify the values between the start and end.
    • Enter the End (deg) angle in degrees.
    Note: Multiple incident angles are required to generate a 2D profile.
  7. Under Theta, specify the plane wave source information for the theta component of the plane wave.
    • Enter the Start (deg) angle in degrees.
    • Enter the Increment to specify the values between the start and end angle.
    • Enter the End (deg) angle in degrees.
  8. Under Polarisation, enter a value for the Polarisation angle (deg) in degrees to specify the plane wave source information for the polarisation of the plane wave.
  9. Under Polarisation, select Calculate orthogonal polarisations to activate the calculation of both polarisations for the plane wave.
  10. Click Generate to set up the model for the specific high-resolution range profile.
    View the generated HRRP model.
    Note:
    • A configuration is created for the HRRP, and any previous configurations are excluded.
    • Variables are created for each parameter, for example, f_center for center frequency.
    • A far field request is added to the HRRP configuration and is set to Calculate fields in plane wave incident direction.


    Figure 2. Example of the generated HRRP model.
  11. Run the model.
    Tip: Use the “Farm RCS sweep to a cluster” application macro to speed up the simulation by dividing the HRRP model over the frequency and angles of incidence.