Crash Course: NearField Analysis using SIwave

Step-by-Step Guide

1. Upload Your PCB:
   • Start by uploading your PCB.
   • Click on the icon to view all five types that SIwave can support, especially IPC 2581 and ODB++.
2. Use the SIwave Wizard:
   • Click on the SIwave wizard icon and navigate to DCIR Drop Analysis.
   • Select the power plane or RF line you want to analyze. You can choose more than one.
3. Add Sources:
   • Select to add a voltage source or a current source.
   • Example: Place a voltage source at the VRM and a current source at the CPU.
   • You can change the values for these sources.
4. Configuration and Validation:
   • Configure and validate the settings to ensure everything is correct.
   • Once validated, close the dialog box.
5. Activate Power Plane:
   • Activate your power plane and highlight the 1.2-volt line.
   • Proceed to simulation and select the Near Field option.
6. Simulation Settings:
   • Enter the name, frequency band, number of points, and specify where you want to calculate the frequency band.
   • Calculate your near field, which is like a box around your PCB.
7. Plot and Analyze Fields:
   • With the solution ready, click to plot the field.
   • Animate the plot with respect to all frequencies.
   • You can plot the E field instead of the H field.
8. Identify EMI Issues:
   • Use these plots to identify locations with EMI issues.
   • A display on the side shows the maximum E field for each frequency.
   • The system checks the whole box of the E field, near field, and detects where the maximum is displayed.
9. Adjust Transparency:
   • Change the transparency to see the field on top of your model.
   • This helps in pinpointing the exact location of the problem.

Additional Information

This guide is provided by Ozen Engineering, Inc., a leader in technical solutions and analysis.