EMI is prevented, not patched. From layout to filtering to compliance testing, our systems are engineered for electromagnetic compatibility from the ground up.
At MarSum Solutions, electromagnetic interference (EMI) is treated as a first-order constraint, not a post-hoc problem. Whether your system is targeting CISPR 25, struggling with common-mode noise, or pushing immunity limits in demanding environments, we solve it at the source.
We model and manage EMI across converters, inverters, harnesses, and PCBs — addressing both differential- and common-mode paths, conducted and radiated emissions, and full-system EMC compliance.
We support the full EMI lifecycle: simulation, mitigation, filtering, shielding, and pre-compliance testing — integrated into the hardware development flow.
We begin by analyzing EMI at the source, combining topology review, field theory, and simulation to identify root causes before layout is locked in.
We evaluate:
Simulation toolchain:
We validate these models through:
Every successful EMI mitigation plan includes correctly designed filtering tailored to the system’s EMI signature and regulatory class.
We design:
Techniques and components:
Design drivers:
Filtering performance is only as good as the layout that supports it. We implement layout practices that control impedance, isolate domains, and block coupling paths.
Key techniques:
Simulation with tools like PowerSI confirms layout parasitics; oscilloscope and probe-based measurements verify real-world noise propagation.
Effective EMI control extends beyond the PCB. We address the full signal and power path, including cable harnesses, chassis integration, and enclosure interfaces.
We design for:
Our systems are built to comply with:
We reduce EMI risk by verifying early — before formal lab time. Our staged validation ensures each revision is quieter than the last.
Test methods include:
Post-scan support:
Typical result:
Joe Marcinkiewicz leads EMI Mitigation & Filtering strategy at MarSum Solutions. With over 30 years in power electronics design and electromagnetic compliance, Joe specializes in:
Joe's experience spans both ultra-low-noise consumer products and EMI-critical aerospace systems. He’s brought dozens of designs across the finish line — compliant, reliable, and production-ready.
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