EMIT modeler#

The EMIT Modeling module includes several classes to enable modeling in EMIT:

  • modeler to return the schematic modeler for an EMIT design.

  • couplings to return a list of all linked couplings within an EMIT design.

  • version to provide the EMIT version information.

  • set_units to set the units globally for the EMIT design.

  • get_units to get the value of the current EMIT design global units.

EMIT version check and set units example:

import pyaedt
from pyaedt import Emit

emit = Emit(pyaedt.generate_unique_project_name(),
            specified_version="2024.1", non_graphical=False,
            new_desktop_session=True, close_on_exit=True)

# This call returns detailed version info for EMIT
ver = emit.version(detailed=True)

# This call sets the global units for EMIT
unit_types = ["Power", "Frequency", "Length", "Time"]
unit_vals = ["kW", "kHz", "meter", "ns"]
emit.set_units(unit_types, unit_vals)

# This call gets all the global units for the EMIT design
all_units = emit.get_units()

# This call gets the global Frequency units for the EMIT design
freq_units = emit.get_units("Frequency")

# Close AEDT
emit.release_desktop(close_projects=True, close_desktop=True)

EMIT-HFSS link creation example:

import os
import pyaedt
from pyaedt import Emit
from pyaedt.generic.filesystem import Scratch

scratch_path = pyaedt.generate_unique_folder_name()
temp_folder = os.path.join(scratch_path, ("EmitHFSSExample"))
if not os.path.exists(temp_folder):

# Launch AEDT
aedtapp = pyaedt.launch_desktop(specified_version="2024.1", non_graphical=False,
                                new_desktop_session=True, close_on_exit=True)

# Verify the ``Cell Phone RFT Defense`` example exists
example_name = "Cell Phone RFI Desense"
example_aedt = example_name + ".aedt"
example_results = example_name + ".aedtresults"
example_lock = example_aedt + ".lock"
example_pdf_file = example_name + " Example.pdf"

example_dir = os.path.join(aedtapp.install_path, "Examples\\EMIT")
example_project = os.path.join(example_dir, example_aedt)
example_results_folder = os.path.join(example_dir, example_results)
example_pdf = os.path.join(example_dir, example_pdf_file)

# If the ``Cell Phone RFT Defense`` example is not
# in the installation directory, exit from this example.
if not os.path.exists(example_project):

# Copy the project to a temp directory
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)

emit = Emit(my_project)

# Remove all existing links
for link in emit.couplings.coupling_names:

# Add the HFSS design as a coupling in EMIT
for link in emit.couplings.linkable_design_names:

# Get all the antennas in the EMIT design
antennas = emit.couplings.antenna_nodes
for ant in antennas:

# Close AEDT
emit.release_desktop(close_projects=True, close_desktop=True)

Create and Analyze an EMIT project:

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

emit = Emit(pyaedt.generate_unique_project_name(),
            specified_version="2024.1", non_graphical=False,
            new_desktop_session=True, close_on_exit=True)

# Create a radio and connect an antenna to it
rad1 = emit.modeler.components.create_component("New Radio")
ant1 = emit.modeler.components.create_component("Antenna")
if rad1 and ant1:

# Quickly create 2 more radios with antennas automatically
# connected to them
rad2, ant2 = emit.modeler.components.create_radio_antenna("GPS Receiver")
rad3, ant3 = emit.modeler.components.create_radio_antenna("Bluetooth Low Energy (LE)", "Bluetooth")

# Create a new ``Revision``
rev = emit.results.analyze()

# Get the receive bands enabled for the GPS Rx
rx_bands = rev.get_band_names(rad2.name, TxRxMode.RX)

# Get the transmit bands enabled for the Bluetooth radio
tx_bands = rev.get_band_names(rad3.name, TxRxMode.TX)

# Configure the interaction domain that will be analyzed
domain = emit.results.interaction_domain()
domain.set_receiver(rad2.name, rx_bands[0], -1)

# Analzye the domain and get the worst case interference
interaction = rev.run(domain)
worst = interaction.get_worst_instance(ResultType.EMI)
emi = worst.get_value(ResultType.EMI)
print("Worst case interference is: {} dB".format(emi))

# Close AEDT
emit.release_desktop(close_projects=True, close_desktop=True)