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Touchstone files

This example shows how to use objects in a Touchstone file without opening AEDT.

To provide the advanced postprocessing features needed for this example, Matplotlib and NumPy must be installed on your machine.

This example runs only on Windows using CPython.

Keywords: Touchstone, report.

Perform imports

Import the required packages.

from ansys.aedt.core import downloads
from ansys.aedt.core.visualization.advanced.touchstone_parser import \
    read_touchstone

Download example data

example_path = downloads.download_touchstone()

Read the Touchstone file

data = read_touchstone(example_path)

Plot data

Get the curve plot by category. The following code shows how to plot lists of the return losses, insertion losses, next, and fext based on a few inputs and port names.

data.plot_return_losses()
data.plot_insertion_losses()
data.plot_next_xtalk_losses("U1")
data.plot_fext_xtalk_losses(tx_prefix="U1", rx_prefix="U7")

True

Identify cross-talk

Identify the worst case cross-talk.

worst_rl, global_mean = data.get_worst_curve(
    freq_min=1,
    freq_max=20,
    worst_is_higher=True,
    curve_list=data.get_return_loss_index(),
)
worst_il, mean2 = data.get_worst_curve(
    freq_min=1,
    freq_max=20,
    worst_is_higher=False,
    curve_list=data.get_insertion_loss_index(),
)
worst_fext, mean3 = data.get_worst_curve(
    freq_min=1,
    freq_max=20,
    worst_is_higher=True,
    curve_list=data.get_fext_xtalk_index_from_prefix(tx_prefix="U1", rx_prefix="U7"),
)
worst_next, mean4 = data.get_worst_curve(
    freq_min=1,
    freq_max=20,
    worst_is_higher=True,
    curve_list=data.get_next_xtalk_index("U1"),
)

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Download this example

Download this example as a Jupyter Notebook or as a Python script.