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(project=proj_name,
                   solution_type="Terminal",
                   design="patch",
                   non_graphical=non_graphical,
                   new_desktop=True,
                   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)

Release AEDT

Release AEDT and clean up temporary folders and files.

hfss.release_desktop()
tmpdir.cleanup()