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Best Practices for S-Parameter Simulation Setup in HFSS
Key tips for high-speed S-parameter simulation in ANSYS HFSS: - **Meshing**: Use adaptive mesh refinement with convergence criteria (e.g., delta S < 0.02). Apply local mesh operations on critical regions like discontinuities, vias, and connectors. Ensure sufficient mesh density at high-frequency edges. - **Port Setup**: Define wave ports or lumped ports aligned with the transmission line mode. Set integration lines correctly to capture dominant modes. For multi-conductor systems, use modal decomposition to extract accurate S-parameters. Validate port impedance matches the system reference (typically 50 Ω). - **Solver Selection**: Use driven modal solver for linear S-parameter analysis. Enable frequency sweep with appropriate interpolation (e.g., fast, sparse, or full) based on bandwidth and accuracy needs. For large models, consider parallel processing or distributed computing to reduce solve time.
Engineer Wu2026-08-18HSPICE Transmission Line Model: Modeling and Verification
Introduce the setup of transmission line models using W elements in Synopsys HSPICE and the workflow for fitting and validating against measured data.
Engineer Zheng2026-08-15