HFSS: Probe-fed patch antenna#

This example shows how to use the Stackup3D class to create and analyze a patch antenna in HFSS.

Note that the HFSS 3D Layout interface may offer advantages for laminate structures such as the patch antenna.

Perform imports#

import os

import pyaedt
import tempfile
from pyaedt.modeler.advanced_cad.stackup_3d import Stackup3D

Set AEDT version#

Set AEDT version.

aedt_version = "2024.1"

Set non-graphical mode#

Set non-graphical mode. "PYAEDT_NON_GRAPHICAL" is set to False to create this documentation.

You can set non_graphical to True to view HFSS while the notebook cells are executed.

non_graphical = False
length_units = "mm"
freq_units = "GHz"

Create temporary working folder#

Use tempfile to create a temporary working folder. Project data is deleted after this example is run.

To save the project data in another location, change the location of the project directory.

# tmpdir.cleanup() at the end of this notebook removes all
# project files and data.

tmpdir = tempfile.TemporaryDirectory(suffix="_aedt")
project_folder = tmpdir.name
proj_name = os.path.join(project_folder, "antenna")

Launch HFSS#

hfss = pyaedt.Hfss(projectname=proj_name,
                   solution_type="Terminal",
                   designname="patch",
                   non_graphical=non_graphical,
                   new_desktop_session=True,
                   specified_version=aedt_version)

hfss.modeler.model_units = length_units

Create patch#

Create the patch.

stackup = Stackup3D(hfss)
ground = stackup.add_ground_layer("ground", material="copper", thickness=0.035, fill_material="air")
dielectric = stackup.add_dielectric_layer("dielectric", thickness="0.5" + length_units, material="Duroid (tm)")
signal = stackup.add_signal_layer("signal", material="copper", thickness=0.035, fill_material="air")
patch = signal.add_patch(patch_length=9.57, patch_width=9.25,
                         patch_name="Patch", frequency=1E10)

stackup.resize_around_element(patch)
pad_length = [3, 3, 3, 3, 3, 3]  # Air bounding box buffer in mm.
region = hfss.modeler.create_region(pad_length, is_percentage=False)
hfss.assign_radiation_boundary_to_objects(region.name)

patch.create_probe_port(ground, rel_x_offset=0.485)
setup = hfss.create_setup(name="Setup1",
                          setup_type="HFSSDriven",
                          Frequency="10GHz")

setup.create_frequency_sweep(unit="GHz",
                             name="Sweep1",
                             start_frequency=8,
                             stop_frequency=12,
                             sweep_type="Interpolating")

hfss.save_project()
hfss.analyze()

True

Plot S11#

plot_data = hfss.get_traces_for_plot()
report = hfss.post.create_report(plot_data)
solution = report.get_solution_data()
plt = solution.plot(solution.expressions)

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.

Release AEDT#

Release AEDT and clean up temporary folders and files.

hfss.release_desktop()
tmpdir.cleanup()

Total running time of the script: (2 minutes 2.174 seconds)

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