HFSS 3D Layout: parametric via analysis

This example shows how you can use HFSS 3D Layout to create and solve a parametric via analysis.

Perform required imports

Perform required imports.

import pyaedt
import os

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.

non_graphical = True

Launch AEDT

Launch AEDT 2023 R2 in graphical mode.

h3d = pyaedt.Hfss3dLayout(specified_version=aedt_version, new_desktop_session=True, non_graphical=non_graphical)

Set up variables

Set up all parametric variables to use in the layout.

h3d["viatotrace"] = "5mm"
h3d["viatovia"] = "10mm"
h3d["w1"] = "1mm"
h3d["sp"] = "0.5mm"
h3d["len"] = "50mm"

Add stackup layers

Add stackup layers.

h3d.modeler.layers.add_layer(layer="GND", layer_type="signal", thickness="0", isnegative=True)
h3d.modeler.layers.add_layer(layer="diel", layer_type="dielectric", thickness="0.2mm", material="FR4_epoxy")
h3d.modeler.layers.add_layer(layer="TOP", layer_type="signal", thickness="0.035mm", elevation="0.2mm")

<pyaedt.modules.LayerStackup.Layer object at 0x00000279FA9FEEC0>

Create signal net and ground planes

Create a signal net and ground planes.

h3d.modeler.create_line(layer="TOP",
                        center_line_coordinates=[[0, 0], ["len", 0]],
                        lw="w1",
                        name="microstrip",
                        net="microstrip")
h3d.modeler.create_rectangle(layer="TOP", origin=[0, "-w1/2-sp"], sizes=["len", "-w1/2-sp-20mm"])
h3d.modeler.create_rectangle(layer="TOP", origin=[0, "w1/2+sp"], sizes=["len", "w1/2+sp+20mm"])

<pyaedt.modeler.pcb.object3dlayout.Rect3dLayout object at 0x00000279FA9FE470>

Create vias

Create vias with parametric positions.

h3d.modeler.create_via(x="viatovia", y="-viatotrace", name="via1")
h3d.modeler.create_via(x="viatovia", y="viatotrace", name="via2")
h3d.modeler.create_via(x="2*viatovia", y="-viatotrace")
h3d.modeler.create_via(x="2*viatovia", y="viatotrace")
h3d.modeler.create_via(x="3*viatovia", y="-viatotrace")
h3d.modeler.create_via(x="3*viatovia", y="viatotrace")

<pyaedt.modeler.pcb.object3dlayout.Pins3DLayout object at 0x00000279F4428400>

Create circuit ports

Create circuit ports.

h3d.create_edge_port("microstrip", 0)
h3d.create_edge_port("microstrip", 2)

<pyaedt.modules.Boundary.BoundaryObject3dLayout object at 0x00000279F442BCA0>

Create setup and sweep

Create a setup and a sweep.

setup = h3d.create_setup()
h3d.create_linear_count_sweep(setup=setup.name, unit="GHz", start_frequency=3, stop_frequency=7,
                              num_of_freq_points=1001, save_fields=False, sweep_type="Interpolating",
                              interpolation_tol_percent=1, interpolation_max_solutions=255, use_q3d_for_dc=False)

<pyaedt.modules.SolveSweeps.SweepHFSS3DLayout object at 0x00000279FA9FE4A0>

Solve and plot results

Solve and plot the results.

h3d.analyze()
traces = h3d.get_traces_for_plot(first_element_filter="Port1")
h3d.post.create_report(traces, variations=h3d.available_variations.nominal_w_values_dict)

<pyaedt.modules.report_templates.Standard object at 0x00000279FA9FEEC0>

Create report outside AEDT

Create a report using Matplotlib.

traces = h3d.get_traces_for_plot(first_element_filter="Port1", category="S")

solutions = h3d.post.get_solution_data(expressions=traces)
solutions.plot(formula="db20")

No artists with labels found to put in legend.  Note that artists whose label start with an underscore are ignored when legend() is called with no argument.

<Figure size 2000x1000 with 1 Axes>

Close AEDT

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

h3d.release_desktop()

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