EMIT: antenna

This example shows how you can use PyAEDT to create a project in EMIT for the simulation of an antenna.

Perform required inputs

Perform required imports.

sphinx_gallery_thumbnail_path = “Resources/emit_simple_cosite.png”

import os
import pyaedt
from pyaedt.emit_core.emit_constants import TxRxMode, ResultType

Set AEDT version

Set AEDT version.

aedt_version = "2024.1"

Set non-graphical mode

Set non-graphical mode. You can set non_graphical either to True or False. The NewThread Boolean variable defines whether to create a new instance of AEDT or try to connect to existing instance of it if one is available.

non_graphical = False
NewThread = True

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.

d = pyaedt.launch_desktop(aedt_version, non_graphical, NewThread)
aedtapp = pyaedt.Emit(pyaedt.generate_unique_project_name())

C:\actions-runner\_work\_tool\Python\3.10.9\x64\lib\subprocess.py:1072: ResourceWarning: subprocess 4028 is still running
  _warn("subprocess %s is still running" % self.pid,
C:\actions-runner\_work\pyaedt\pyaedt\testenv\lib\site-packages\pyaedt\generic\settings.py:368: ResourceWarning: unclosed file <_io.TextIOWrapper name='D:\\Temp\\pyaedt_ansys.log' mode='a' encoding='cp1252'>
  self._logger = val

Create and connect EMIT components

Create three radios and connect an antenna to each one.

rad1 = aedtapp.modeler.components.create_component("New Radio")
ant1 = aedtapp.modeler.components.create_component("Antenna")
if rad1 and ant1:
    ant1.move_and_connect_to(rad1)

# Convenience method to create a radio and antenna connected together
rad2, ant2 = aedtapp.modeler.components.create_radio_antenna("GPS Receiver")
rad3, ant3 = aedtapp.modeler.components.create_radio_antenna("Bluetooth Low Energy (LE)", "Bluetooth")

Define coupling among RF systems

Define the coupling among the RF systems. This portion of the EMIT API is not yet implemented.

Run EMIT simulation

Run the EMIT simulation.

This part of the example requires Ansys AEDT 2023 R2.

if aedt_version > "2023.1" and os.getenv("PYAEDT_DOC_GENERATION", "False") != "1":
    rev = aedtapp.results.analyze()
    rx_bands = rev.get_band_names(rad2.name, TxRxMode.RX)
    tx_bands = rev.get_band_names(rad3.name, TxRxMode.TX)
    domain = aedtapp.results.interaction_domain()
    domain.set_receiver(rad2.name, rx_bands[0], -1)
    domain.set_interferer(rad3.name,tx_bands[0])
    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))

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

True