How to get S parameters matrix data from a solved HFSS design

[AleksandarToshev-eag]

Hi

I am trying to get the S parameters matrix from a solved HFSS design. I am getting FfdSolutionDataExporter object with this:

if setup_of_interest.is_solved:
ffddata = hfss_instance.get_antenna_ffd_solution_data(
frequencies=[9e9],
setup=available_setups[0] + ' : ' + available_sweeps[0],
sphere="3D")

I was watching some videos demonstration that ffddata should contain touchstone data as well. However I am missing S parameters. Am I using old version of Pyaedt (I guess my version is 0.9.9)? How should I get the S parameters matrix?

[fwlfHS]

You could either use hfss_instance.post.get_solution_data(<...>) and specify the expression you want to export or directly hfss_instance.export_touchstone(<...>) if you like to get a standard touchstone file as output.

[AleksandarToshev-eag]

Thanks for the help!

[fwlfHS]

yes. if you leave the expression argument empty you get all traces, so all ports. Please check also the examples given in the documentation.

[AleksandarToshev-eag]

Thank You!

[Samuelopez-ansys]

Hi @AleksandarToshev-eag ,

You can export the touchstone also:
from pyaedt.application.analysis_hf import ScatteringMethods
from pyaedt import Hfss
app = Hfss()
scattering = ScatteringMethods(app)

setup_sweep_parts = setup_name.split(":")

setup_name = setup_sweep_parts[0].strip()
sweep_name = setup_sweep_parts[1].strip()

touchstone_file = scattering.export_touchstone(setup=setup_name, sweep=sweep_name)

This pull request will export Sparamters when you export the farfield as well:
#4893

Next week, it should be merged in a new PyAEDT release.

[AleksandarToshev-eag]

Thank you Samuel