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How to include co-planar coupling effect in impedance simulations in Sigrity PowerSI

SimTech

By default, shapes directly above and below a trace are used as reference in impedance coupling. 

Co-planar coupling refers to trace couplings to shapes next to a trace on the same layer. To include co-planar coupling in impedance calculation, enable the Detect and model the coplanar traces with field domains option in Tools > Options > Edit Options > Simulation (Advanced) > Nets and Shapes. 

This option improves simulation accuracy when a trace is close to a metal shape on the same layer. The interaction between the trace and the metal plane is modeled. The level of interaction is usually quite low, but it might affect the characteristics of the trace. 

Team SimTech, 

Cadence Design Systems 

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