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

EMC Concepts Explained

Analysis of Transmission Lines in Sinusoidal Steady State: Part 3

This is the third and final article discussing four different circuit models of transmission lines in sinusoidal steady state. This article uses Model 4 to determine the locations of the minima and maxima of standing waves. This determination is first done analytically, followed by the graphical method using the Smith chart.

EMC Concepts Explained

Analysis of Transmission Lines in Sinusoidal Steady State: Part 2

This column continues a series on transmission line circuit models, exploring two additional models. It derives equations for voltage characteristics and standing waves, building upon concepts introduced in the previous installment.

EMC Concepts Explained

Smith Chart and Voltage Standing Wave Ratio

This article explains how to use a Smith Chart to determine the voltage standing wave ratio (VSWR).

EMC Concepts Explained

Common-Impedance Coupling

Explore the impact of the return path impedance and the return current level on common-impedance coupling between circuits. The measurements presented were performed on a custom PCB containing audio, video, and high-current circuitry, where the return paths for each circuit were selectively shared with other circuits.

EMC Concepts Explained

Crosstalk Between PCB Traces – Time and Frequency Domain Measurements, Part 2

In this article, we investigate the impact of a guard trace on crosstalk reduction and present measurements taken with the latest‑generation PCB, both in time and frequency domains.

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EMC Concepts Explained

Crosstalk between PCB Traces – Time and Frequency Domain Measurements, Part 1

This article is the first of a two-article series devoted to the topic of crosstalk between PCB traces. In Part 1 of the series, we vary circuit topology, i.e., the distance between traces and the distance to the ground plane.

EMC Concepts Explained

Image Theory: Radiation From Hertzian Dipole Above Ground Plane

This article presents the derivation of the radiated far fields from a Hertzian dipole antenna above the ground plane using image theory.

EMC Concepts Explained

Impact of Decoupling Capacitors and Trace Length on Conducted Emissions in a CMOS Inverter Circuit

The authors evaluate the impact of capacitors and trace length on conducted emissions.

Columns

Impact of Decoupling Capacitors and Trace Length on Radiated Emissions in a CMOS Inverter Circuit

This article evaluates the impact of decoupling capacitors and trace length on radiated emissions.

Columns

Difference Amplifier: Common Mode and Differential Mode Voltages

This column describes the operation of an ideal difference amplifier. It is shown that an ideal difference amplifier (with no resistance mismatches) eliminates the common mode portion of the input voltage and amplifies only the differential mode portion of the input voltage.

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Bogdan Adamczyk

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