Substrate

This section describes the Circuit substrate modules, which provide classes and methods to manage substrate data blocks in Circuit designs.

A substrate data block defines the physical and electrical properties of a transmission-line substrate (microstrip, stripline, CPW) and is referenced by distributed circuit elements inside an AEDT Circuit design.

Substrate manager

The SubstrateManager is the main entry point, accessible through substrate property in Circuit class. Use it to add, query, and delete substrate data blocks in the active Circuit design.

SubstrateManager

Manages substrate data blocks for a Circuit design.

from ansys.aedt.core import Circuit

app = Circuit(
    version="2026.1",
    non_graphical=False,
)

# Add a microstrip substrate
sub = app.substrate.add_microstrip("10mil", 4.4, 0.02, "25mm", name="MySub")

# List all substrate names in the design
print(app.substrate.names)

# Modify a property and push it to AEDT
sub.permittivity = 3.5

# Delete the substrate
app.substrate.delete("MySub")

Substrate data block

The SubstrateDataBlock represents a single substrate definition. Each instance exposes read and write properties for the substrate geometry and material parameters (height, permittivity, loss tangent, conductor thickness) as well as a update() method to push changes back to AEDT.

SubstrateDataBlock

Represents a substrate data block and provides the API to create it.