Create a RF trace taper

[hui-zhou-a]

This example shows how to create a parameterized RF trace taper

from pyedb import Edb

# Create an empty layout
edbapp = Edb(version="2025.2", grpc=False)

# Create a stackup
edbapp.stackup.create_symmetric_stackup(2)

# Create variables
edbapp["p0_x"] = "0mm"
edbapp["p0_y"] = "0mm"
edbapp["p1_x"] = "1mm"
edbapp["p1_y"] = "0mm"
edbapp["p2_x"] = "2mm"
edbapp["p2_y"] = "0mm"
edbapp["p3_x"] = "3mm"
edbapp["p3_y"] = "0mm"
edbapp["w0"] = "1mm"
edbapp["w1"] = "0.5mm"

# Draw the trace segment on the left
edbapp.modeler.create_trace(
    path_list=[("p0_x", "p0_y"), ("p1_x", "p1_y")],
    width="w0",
    layer_name="Top",
    net_name="signal",
    start_cap_style="flat",
    end_cap_style="flat",
)

# Draw the taper
taper = edbapp.modeler.create_taper(
    start_point=("p1_x", "p1_y"),
    end_point=("p2_x", "p2_y"),
    start_width="w0",
    end_width="w1",
    layer_name="Top",
    net_name="signal"
)

# Draw the trace segment on the right
edbapp.modeler.create_trace(
    path_list=[("p2_x", "p2_y"), ("p3_x", "p3_y")],
    width="w1",
    layer_name="Top",
    net_name="signal",
    start_cap_style="flat",
    end_cap_style="flat",
)
edbapp.save()
edbapp.nets["signal"].plot()
edbapp.close(terminate_rpc_session=False)

You should see below in the plot

[hui-zhou-a]

create_taper is available from v0.72

[daneansys]

Thank you for sharing the example Hui. I learned from this that setting grpc to false appears to be required to maintain symbolic parameters, which was really helpful for another model. There are two things I noticed with create_taper that might need to be addressed:

1. If you set pt1_x to other than default values, the line overlaps or gets disconnected leading to invalid geometry
2. The equation created for on the taper object for Pt0 through Pt3 seem far more complex than necessary. For example, for Pt1:
   (((((0)-(0))(cos(atan(((p2_y)-(p1_y))/((p2_x)-(p1_x))))))-((((w0)/(-2))-(0))(sin(atan(((p2_y)-(p1_y))/((p2_x)-(p1_x)))))))+(0))+(0.001) ,(((((0)-(0))(sin(atan(((p2_y)-(p1_y))/((p2_x)-(p1_x))))))+((((w0)/(-2))-(0))(cos(atan(((p2_y)-(p1_y))/((p2_x)-(p1_x)))))))+(0))+(0)