Bogdan Adamczyk

Dr. Bogdan Adamczyk is professor and director of the EMC Center at Grand Valley State University (http://www.gvsu.edu/emccenter) where he performs EMC educational research and regularly teaches EM/EMC courses and EMC certificate courses for industry. He is an iNARTE-certified EMC Master Design Engineer. He is the author of two textbooks, “Foundations of Electromagnetic Compatibility with Practical Applications” (Wiley, 2017) and “Principles of Electromagnetic Compatibility: Laboratory Exercises and Lectures” (Wiley, 2024). He has been writing “EMC Concepts Explained” since January 2017.

From This Author

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S-Parameters Tutorial – Part II: EMC Measurements and Testing

This part II of the s-parameter tutorial presents several examples of the s-parameter use in EMC measurements and testing.
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S-Parameters Tutorial – Part I: Fundamental Background

This s-parameters tutorial consists of two parts: Part I discusses the fundamental background needed to understand the concept of s-parameters; Part II explains the s-parameters use in EMC measurements and testing
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EMI Reduction by Spread-Spectrum Frequency Dithering

This article examines the spread-spectrum frequency dithering technique to reduce the EMI noise from a SMPS.
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Bulk Current Injection (BCI) – Substitution Method and Closed-Loop Method with Power Limitation

This column explores the conducted immunity test known as a Bulk Current Injection (BCI) test, according to ISO 11452-4 specification.
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SMPS Input Filter Design: Negative Resistance Approach

This article discusses a practical approach to designing an input filter to the switch-mode power supply (SMPS).
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EMC Concepts Explained

Near-Field Shield Effectiveness Evaluation Using H-Field Probe

Direct H-field measurements put phosphor bronze, nickel silver, and cold-rolled steel shields to the test near a working SMPS, revealing which material and thickness actually holds up. The results also expose how much shielding effectiveness a single row of apertures can quietly wipe out.
EMC Concepts Explained

Impact of a Trace Length on Capacitor Frequency Response

Trace length does more to a capacitor's frequency response than most engineers assume. This study puts three connecting trace lengths through simulation and measurement, tracking how each shifts the self-resonant frequency and threatens decoupling performance at the frequencies that matter most.
EMC Concepts Explained

Guard Trace Impact on Crosstalk Between PCB Traces

Adding a guard trace between PCB traces sounds like a simple crosstalk fix — but grounding it wrong can actually make interference worse, not better. See how capacitive and inductive coupling respond differently to grounding placement, and why one counterintuitive result changes the design approach.
EMC Concepts Explained

Common-Impedance Coupling Between Circuits

When two circuits share a return path with non-zero impedance, the result is common-impedance coupling — and real EMC problems. This foundations piece breaks down the theory with circuit models, then backs it up with lab measurements showing how ground impedance affects audio, video, and high-current circuits sharing a common return path.
EMC Concepts Explained

Radiated Emissions Measurements: OATS and ALSE Methods

From open fields to shielded enclosures, radiated emissions testing demands precision at every step — this technical deep dive compares OATS and ALSE measurement methods, antenna configurations, and FCC and CISPR compliance limits across a broad frequency spectrum.
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