Extract Electrical model from HFSS design

This section presents a methodology for an electrical behavioral model extraction from antenna design to be able to use it in a global system simulation in VISION.

To extract the electrical data from an existing HFSS antenna design, it is necessary to take the following steps:

  1. Open the HFSS project
    Figure: HFSS project


  2. Edit the excitations of each port of the array. The design shown here features a 16- patch array with one excitement per patch. Each excitation must be assigned with a name. For example: row_number and_column_number.
    Figure: Edit source name


  3. Enter the amplitude and phase of each source. For example, 1W and 0 degrees on each patch.
    Figure: Edit sources


  4. 4 For the free-space discretization, click on “Radiation”, then “Insert Far-field Setup”. For example, the Phi space is discretized from -180 to +180 with a step of 1 degree, and the Theta space is discretized from 0 to 180 degrees with steps of 1 degree.
    Figure: Edit radiation sphere


  5. The next step is to define the design analysis frequencies. It is important to define at least 3 frequencies to be able to model the behavior in VISION. We choose in this example 5 frequencies varying from 27 GHz to 29 GHz. Click on “Analyze “  “ Driven solution setup“  “General”, then choose “Multi-Frequencies mode”. Specify the list of frequencies to analyze. It is necessary to re-specify the sweep a second time.
    Figure: Setup simulation parameters


  6. Start the analysis by clicking on “Setup”  “Run Analysis”.
  7. 7 To export the electrical parameters file (S parameters), click on “Results” tab, then go to the Data solution area. Choose the setup, and the sweep of interest and click on “Display all frequencies” in the “Export” tab. Finally, choose the file format (SnP or Citifile). The electrical part of the model is now extracted.
    Figure: Export S-parameter file