EMC/EMI Simulation — Emissions, Immunity & Shielding Effectiveness
Electromagnetic compatibility simulation, radiated emissions from PCBs and cables, shielding effectiveness, chassis apertures, and FCC/CE compliance.
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Quick Explainer
How does FEM or FDTD help with EMC analysis during product design?
Traditional EMC was test-driven — build a prototype and take it to an emissions lab. With simulation, you predict radiated emissions from PCB traces, cable harnesses, or chassis apertures early in design. The simulation checks far-field radiation against FCC/CE limits before any hardware is built, dramatically reducing design-test-fix cycles.
What is shielding effectiveness and what determines it?
Shielding effectiveness (SE in dB) is the ratio of field strength without to with shielding. Real enclosures have apertures (vents, displays, connectors) that reduce SE. When aperture size is comparable to lambda/2, resonances occur and SE drops dramatically. Simulation maps SE vs. frequency and identifies which aperture dominates degradation.