EMIT: HFSS to EMIT coupling#

This example shows how you can use PyAEDT to open an AEDT project with an HFSS design, create an EMIT design in the project, and link the HFSS design as a coupling link in the EMIT design.

Perform required imports#

Perform required imports.

sphinx_gallery_thumbnail_path = “Resources/emit_hfss.png”

import os

# Import required modules
import pyaedt
from pyaedt.generic.filesystem import Scratch
from pyaedt.emit_core.emit_constants import TxRxMode, ResultType
# Set non-graphical mode

Set non-graphical mode. You can set non_graphical either to True or False. The Boolean parameter new_thread defines whether to create a new instance of AEDT or try to connect to an existing instance of it.

The following code uses AEDT 2023 R2.

non_graphical = False
NewThread = True
desktop_version = "2023.2"
scratch_path = pyaedt.generate_unique_folder_name()

Launch AEDT with EMIT#

Launch AEDT with EMIT. The Desktop class initializes AEDT and starts it on the specified version and in the specified graphical mode.

Initializing new desktop!
C:\actions-runner\_work\_tool\Python\3.10.5\x64\lib\subprocess.py:1070: ResourceWarning: subprocess 1844 is still running
  _warn("subprocess %s is still running" % self.pid,

If the Cell Phone RFT Defense example is not in the installation directory, exit from this example.

if not os.path.exists(example_project):
    msg = """
        Cell phone RFT Desense example file is not in the
         Examples/EMIT directory under the EDT installation. You cannot run this example.
    d.release_desktop(True, True)

my_project = os.path.join(temp_folder, example_aedt)
my_results_folder = os.path.join(temp_folder, example_results)
my_project_lock = os.path.join(temp_folder, example_lock)
my_project_pdf = os.path.join(temp_folder, example_pdf_file)

if os.path.exists(my_project):

if os.path.exists(my_project_lock):

with Scratch(scratch_path) as local_scratch:
    local_scratch.copyfile(example_project, my_project)
    local_scratch.copyfolder(example_results_folder, my_results_folder)
    if os.path.exists(example_pdf):
        local_scratch.copyfile(example_pdf, my_project_pdf)

aedtapp = pyaedt.Emit(my_project)
Returning found desktop with PID 1844!

Create and connect EMIT components#

Create two radios with antennas connected to each one.

rad1, ant1 = aedtapp.modeler.components.create_radio_antenna("Bluetooth Low Energy (LE)")
rad2, ant2 = aedtapp.modeler.components.create_radio_antenna("Bluetooth Low Energy (LE)")

Define coupling among RF systems#

Define coupling among the RF systems.

for link in aedtapp.couplings.linkable_design_names:

for link in aedtapp.couplings.coupling_names:

Run EMIT simulation#

Run the EMIT simulation. This portion of the EMIT API is not yet implemented.

This part of the example requires Ansys AEDT 2023 R2.

if desktop_version > "2023.1":
    rev = aedtapp.results.analyze()
    rx_bands = rev.get_band_names(rad1.name, TxRxMode.RX)
    tx_bands = rev.get_band_names(rad2.name, TxRxMode.TX)
    domain = aedtapp.results.interaction_domain()
    domain.set_receiver(rad1.name, rx_bands[0], -1)
    interaction = rev.run(domain)
    worst = interaction.get_worst_instance(ResultType.EMI)
    if worst.has_valid_values():
        emi = worst.get_value(ResultType.EMI)
        print("Worst case interference is: {} dB".format(emi))
Worst case interference is: 90.0 dB

Save project and close AEDT#

After the simulation completes, you can close AEDT or release it using the pyaedt.Desktop.force_close_desktop() method. All methods provide for saving the project before closing.

aedtapp.release_desktop(close_projects=True, close_desktop=True)

Total running time of the script: (0 minutes 50.989 seconds)

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