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How to improve simulation accuracy when a trace is close to same layer metal shape

SimTech

By default, Power SI do not consider the reference from the same plane when calculating the impedance. To include the impact of layer metal shape on a trace, In the Workflow > Setup ERC Sim Options, select the Detect and model the coplanar traces option. With this option enabled, the effect from the same layer reference (coplanar metal shapes) is considered during simulation, thereby improving the accuracy of the simulation results. 

 

Click here to learn more about the Power SI trace Impedance / Coupling Workflow 

Team SimTech

Cadence Design Systems

  • SimTech

    Further you can refer to the below link about what a coplanar structure is and how coplanar couplings affect the impedance calculation in PowerSI tool:

    Coupling of Traces and Shapes in Coplanar Structure

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