EDB: fully parametrized CPWG design#

This example shows how you can use HFSS 3D Layout to create a parametric design for a CPWG (coplanar waveguide with ground).

Perform required imports#

Perform required imports. Importing the Hfss3dlayout object initializes it on version 2023 R2.

[1]:

import os

[2]:

import ansys.aedt.core
import numpy as np

[3]:

from pyedb import Edb
from pyedb.generic.general_methods import (
    generate_unique_folder_name,
    generate_unique_name,
)

Set non-graphical mode#

Set non-graphical mode. The default is False.

[4]:

non_graphical = False

Launch EDB#

[5]:

aedb_path = os.path.join(generate_unique_folder_name(), generate_unique_name("pcb") + ".aedb")
print(aedb_path)

# Select EDB version (change it manually if needed, e.g. "2024.2")
edb_version = "2024.2"
print(f"EDB version: {edb_version}")
aedt_version = edb_version

edbapp = Edb(edbpath=aedb_path, edbversion=edb_version)

C:\Users\ansys\AppData\Local\Temp\pyedb_prj_UN5\pcb_8Z1VIJ.aedb
EDB version: 2024.2
PyAEDT INFO: Logger is initialized in EDB.
PyAEDT INFO: legacy v0.34.3
PyAEDT INFO: Python version 3.10.11 (tags/v3.10.11:7d4cc5a, Apr  5 2023, 00:38:17) [MSC v.1929 64 bit (AMD64)]
PyAEDT INFO: EDB C:\Users\ansys\AppData\Local\Temp\pyedb_prj_UN5\pcb_8Z1VIJ.aedb created correctly.
PyAEDT INFO: EDB initialized.

Define parameters#

[6]:

params = {
    "$ms_width": "0.4mm",
    "$ms_clearance": "0.3mm",
    "$ms_length": "20mm",
}
for par_name in params:
    edbapp.add_project_variable(par_name, params[par_name])

Create s symmetric stackup#

[7]:

edbapp.stackup.create_symmetric_stackup(2)
edbapp.stackup.plot()

C:\actions-runner\_work\pyedb\pyedb\.venv\lib\site-packages\pyedb\dotnet\edb_core\stackup.py:2868: UserWarning: FigureCanvasAgg is non-interactive, and thus cannot be shown
  plt.show()

[7]:

<module 'matplotlib.pyplot' from 'C:\\actions-runner\\_work\\pyedb\\pyedb\\.venv\\lib\\site-packages\\matplotlib\\pyplot.py'>

Draw planes#

[8]:

plane_lw_pt = ["0mm", "-3mm"]
plane_up_pt = ["$ms_length", "3mm"]

top_layer_obj = edbapp.modeler.create_rectangle(
    "TOP", net_name="gnd", lower_left_point=plane_lw_pt, upper_right_point=plane_up_pt
)
bot_layer_obj = edbapp.modeler.create_rectangle(
    "BOTTOM", net_name="gnd", lower_left_point=plane_lw_pt, upper_right_point=plane_up_pt
)
layer_dict = {"TOP": top_layer_obj, "BOTTOM": bot_layer_obj}

Draw a trace#

[9]:

trace_path = [["0", "0"], ["$ms_length", "0"]]
edbapp.modeler.create_trace(
    trace_path,
    layer_name="TOP",
    width="$ms_width",
    net_name="sig",
    start_cap_style="Flat",
    end_cap_style="Flat",
)

[9]:

<pyedb.dotnet.edb_core.cell.primitive.path.Path at 0x1811714b4f0>

Create a trace to plane clearance#

[10]:

poly_void = edbapp.modeler.create_trace(
    trace_path,
    layer_name="TOP",
    net_name="gnd",
    width="{}+2*{}".format("$ms_width", "$ms_clearance"),
    start_cap_style="Flat",
    end_cap_style="Flat",
)
edbapp.modeler.add_void(layer_dict["TOP"], poly_void)

[10]:

True

Create a ground via padstack and place ground stitching vias#

[11]:

edbapp.padstacks.create(
    padstackname="GVIA",
    holediam="0.3mm",
    paddiam="0.5mm",
)

yloc_u = "$ms_width/2+$ms_clearance+0.25mm"
yloc_l = "-$ms_width/2-$ms_clearance-0.25mm"

for i in np.arange(1, 20):
    edbapp.padstacks.place([str(i) + "mm", yloc_u], "GVIA", net_name="GND")
    edbapp.padstacks.place([str(i) + "mm", yloc_l], "GVIA", net_name="GND")

PyAEDT INFO: Padstack GVIA create correctly

Save and close EDB#

[12]:

edbapp.save_edb()
edbapp.close_edb()

PyAEDT INFO: EDB file save time: 0.00ms
PyAEDT INFO: EDB file release time: 0.00ms

[12]:

True

Open EDB in AEDT#

[13]:

aedt_version = edb_version

[14]:

h3d = ansys.aedt.core.Hfss3dLayout(
    projectname=aedb_path,
    specified_version=aedt_version,
    non_graphical=non_graphical,
    new_desktop_session=True,
)

PyAEDT WARNING: Argument `projectname` is deprecated for method `__init__`; use `project` instead.
PyAEDT WARNING: Argument `specified_version` is deprecated for method `__init__`; use `version` instead.
PyAEDT WARNING: Argument `new_desktop_session` is deprecated for method `__init__`; use `new_desktop` instead.
PyAEDT INFO: Python version 3.10.11 (tags/v3.10.11:7d4cc5a, Apr  5 2023, 00:38:17) [MSC v.1929 64 bit (AMD64)]
PyAEDT INFO: PyAEDT version 0.12.dev0.
PyAEDT INFO: Initializing new Desktop session.
PyAEDT INFO: Log on console is enabled.
PyAEDT INFO: Log on file C:\Users\ansys\AppData\Local\Temp\pyaedt_ansys_e3f78fb2-e461-48a6-826c-e713064cf10a.log is enabled.
PyAEDT INFO: Log on AEDT is enabled.
PyAEDT INFO: Debug logger is disabled. PyAEDT methods will not be logged.
PyAEDT INFO: Launching PyAEDT with gRPC plugin.
PyAEDT INFO: New AEDT session is starting on gRPC port 58797
PyAEDT INFO: AEDT installation Path C:\Program Files\AnsysEM\v242\Win64
PyAEDT INFO: Ansoft.ElectronicsDesktop.2024.2 version started with process ID 4020.
PyAEDT INFO: EDB folder C:\Users\ansys\AppData\Local\Temp\pyedb_prj_UN5\pcb_8Z1VIJ.aedb has been imported to project pcb_8Z1VIJ
PyAEDT INFO: Active Design set to 0;Cell_ZGJGPV
PyAEDT INFO: Aedt Objects correctly read

Create wave ports#

[15]:

h3d.create_edge_port("line_3", 0, iswave=True, wave_vertical_extension=10, wave_horizontal_extension=10)
h3d.create_edge_port("line_3", 2, iswave=True, wave_vertical_extension=10, wave_horizontal_extension=10)

PyAEDT WARNING: Argument `iswave` is deprecated for method `create_edge_port`; use `is_wave_port` instead.
PyAEDT INFO: Loading Modeler.
PyAEDT INFO: Modeler loaded.
PyAEDT INFO: EDB loaded.
PyAEDT INFO: Layers loaded.
PyAEDT INFO: Primitives loaded.
PyAEDT INFO: Modeler class has been initialized! Elapsed time: 0m 0sec
PyAEDT ERROR: **************************************************************
PyAEDT ERROR:   File "C:\actions-runner\_work\_tool\Python\3.10.11\x64\lib\runpy.py", line 196, in _run_module_as_main
PyAEDT ERROR:     return _run_code(code, main_globals, None,
PyAEDT ERROR:   File "C:\actions-runner\_work\_tool\Python\3.10.11\x64\lib\runpy.py", line 86, in _run_code
PyAEDT ERROR:     exec(code, run_globals)
PyAEDT ERROR:   File "C:\actions-runner\_work\_tool\Python\3.10.11\x64\lib\asyncio\base_events.py", line 603, in run_forever
PyAEDT ERROR:     self._run_once()
PyAEDT ERROR:   File "C:\actions-runner\_work\_tool\Python\3.10.11\x64\lib\asyncio\base_events.py", line 1909, in _run_once
PyAEDT ERROR:     handle._run()
PyAEDT ERROR:   File "C:\actions-runner\_work\_tool\Python\3.10.11\x64\lib\asyncio\events.py", line 80, in _run
PyAEDT ERROR:     self._context.run(self._callback, *self._args)
PyAEDT ERROR:   File "C:\Users\ansys\AppData\Local\Temp\ipykernel_10592\2075340592.py", line 1, in <module>
PyAEDT ERROR:     h3d.create_edge_port("line_3", 0, iswave=True, wave_vertical_extension=10, wave_horizontal_extension=10)
PyAEDT ERROR: AEDT API Error on create_edge_port
PyAEDT ERROR: Method arguments:
PyAEDT ERROR:     assignment = line_3
PyAEDT ERROR:     is_wave_port = True
PyAEDT ERROR:     wave_horizontal_extension = 10
PyAEDT ERROR:     wave_vertical_extension = 10
PyAEDT ERROR: **************************************************************
PyAEDT WARNING: Argument `iswave` is deprecated for method `create_edge_port`; use `is_wave_port` instead.
PyAEDT ERROR: **************************************************************
PyAEDT ERROR:   File "C:\actions-runner\_work\_tool\Python\3.10.11\x64\lib\runpy.py", line 196, in _run_module_as_main
PyAEDT ERROR:     return _run_code(code, main_globals, None,
PyAEDT ERROR:   File "C:\actions-runner\_work\_tool\Python\3.10.11\x64\lib\runpy.py", line 86, in _run_code
PyAEDT ERROR:     exec(code, run_globals)
PyAEDT ERROR:   File "C:\actions-runner\_work\_tool\Python\3.10.11\x64\lib\asyncio\base_events.py", line 603, in run_forever
PyAEDT ERROR:     self._run_once()
PyAEDT ERROR:   File "C:\actions-runner\_work\_tool\Python\3.10.11\x64\lib\asyncio\base_events.py", line 1909, in _run_once
PyAEDT ERROR:     handle._run()
PyAEDT ERROR:   File "C:\actions-runner\_work\_tool\Python\3.10.11\x64\lib\asyncio\events.py", line 80, in _run
PyAEDT ERROR:     self._context.run(self._callback, *self._args)
PyAEDT ERROR:   File "C:\Users\ansys\AppData\Local\Temp\ipykernel_10592\2075340592.py", line 2, in <module>
PyAEDT ERROR:     h3d.create_edge_port("line_3", 2, iswave=True, wave_vertical_extension=10, wave_horizontal_extension=10)
PyAEDT ERROR: AEDT API Error on create_edge_port
PyAEDT ERROR: Method arguments:
PyAEDT ERROR:     assignment = line_3
PyAEDT ERROR:     edge_number = 2
PyAEDT ERROR:     is_wave_port = True
PyAEDT ERROR:     wave_horizontal_extension = 10
PyAEDT ERROR:     wave_vertical_extension = 10
PyAEDT ERROR: **************************************************************

[15]:

False

Edit airbox extents#

[16]:

h3d.edit_hfss_extents(air_vertical_positive_padding="10mm", air_vertical_negative_padding="1mm")

[16]:

True

Create setup#

[17]:

setup = h3d.create_setup()
setup["MaxPasses"] = 2
setup["AdaptiveFrequency"] = "3GHz"
setup["SaveAdaptiveCurrents"] = True
h3d.create_linear_count_sweep(
    setupname=setup.name,
    unit="GHz",
    freqstart=0,
    freqstop=5,
    num_of_freq_points=1001,
    sweepname="sweep1",
    sweep_type="Interpolating",
    interpolation_tol_percent=1,
    interpolation_max_solutions=255,
    save_fields=False,
    use_q3d_for_dc=False,
)

PyAEDT WARNING: Argument `setupname` is deprecated for method `create_linear_count_sweep`; use `setup` instead.
PyAEDT WARNING: Argument `freqstart` is deprecated for method `create_linear_count_sweep`; use `start_frequency` instead.
PyAEDT WARNING: Argument `freqstop` is deprecated for method `create_linear_count_sweep`; use `stop_frequency` instead.
PyAEDT WARNING: Argument `sweepname` is deprecated for method `create_linear_count_sweep`; use `name` instead.
PyAEDT INFO: Linear count sweep sweep1 has been correctly created.

[17]:

<ansys.aedt.core.modules.solve_sweeps.SweepHFSS3DLayout at 0x1811714b1f0>

Plot layout#

[18]:

h3d.modeler.edb.nets.plot(None, None, color_by_net=True)

cp_name = h3d.modeler.clip_plane()

PyAEDT INFO: Logger is initialized in EDB.
PyAEDT INFO: legacy v0.34.3
PyAEDT INFO: Python version 3.10.11 (tags/v3.10.11:7d4cc5a, Apr  5 2023, 00:38:17) [MSC v.1929 64 bit (AMD64)]
PyAEDT INFO: Database pcb_8Z1VIJ.aedb Opened in 2024.2
PyAEDT INFO: Cell Cell_ZGJGPV Opened
PyAEDT INFO: Builder was initialized.
PyAEDT INFO: EDB initialized.
PyAEDT INFO: Plot Generation time 0.095

Solve the active design#

Uncomment the following code to start the HFSS solver and perform post processing.

[19]:

# h3d.analyze()

# solutions = h3d.get_touchstone_data()[0]
# solutions.log_x = False
# solutions.plot()

# h3d.post.create_fieldplot_cutplane(
#     cp_name, "Mag_E", h3d.nominal_adaptive, intrinsincDict={"Freq": "3GHz", "Phase": "0deg"}
# )

Save AEDT#

[20]:

aedt_path = aedb_path.replace(".aedb", ".aedt")
h3d.logger.info("Your AEDT project is saved to {}".format(aedt_path))
h3d.save_project()

PyAEDT INFO: Your AEDT project is saved to C:\Users\ansys\AppData\Local\Temp\pyedb_prj_UN5\pcb_8Z1VIJ.aedt
PyAEDT INFO: Project pcb_8Z1VIJ Saved correctly

[20]:

True

Release AEDT#

[21]:

h3d.release_desktop()

PyAEDT INFO: Desktop has been released and closed.

[21]:

True
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