Arturo Mediano

Arturo Mediano received his M.Sc. (1990) and his Ph. D. (1997) in Electrical Engineering from University of Zaragoza (Spain), where he has held a teaching professorship in EMI/EMC/RF/SI from 1992. From 1990, he has been involved in R&D projects in EMI/EMC/SI/RF fields for communications, industry and scientific/medical applications with a solid experience in training, consultancy and troubleshooting for companies in Spain, USA, Switzerland, France, UK, Italy, Belgium, Germany, Canada, The Netherlands, Portugal, and Singapore. He is the founder of The HF-Magic Lab®, a specialized laboratory for design, diagnostic, troubleshooting, and training in the EMI/EMC/SI and RF fields at I3A (University of Zaragoza), and from 2011, he is instructor for Besser Associates (CA, USA) offering public and on site courses in EMI/EMC/SI/RF subjects through the USA, especially in Silicon Valley/San Francisco Bay Area. He is Senior Member of the IEEE, active member from 1999 (Chair 2013-2016) of the MTT-17 (HF/VHF/UHF) Technical Committee of the Microwave Theory and Techniques Society and member of the Electromagnetic Compatibility Society.
http://www.cartoontronics.com
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From This Author

Columns

Passive Filters Can Be Unconventionally Saturated

Usually HF filters are designed using inductors with cores. In this way a medium/high inductance value is obtained in small size components. But using cores has a limitation.
Columns

The Useful Mirror Technique

The mirror technique is a very old technique to be used with PCBs when failing in radiated EMC tests. An easy solution to avoid changes in layout if the technique can be applied to your product.
Columns

Harmonics in Clocks Creating EMI Problems

Clock signals from 1 to 100MHz are usually responsible for radiated EMC problems in HF/VHF range. Harmonics are the culprits, but think in current, not in voltage.
Practical Tips

Transients Created by High di/dt and Inductive Loads

When switches interrupt current through inductive loads, the results can be destructive — high-voltage spikes, HF ringing, and arcing that threatens both components and nearby circuits. This article breaks down the physics behind these transients and demonstrates practical, low-cost protection strategies.
Practical Tips

Snubbers to Kill Parasitic Resonances

Learn how to calculate RC snubber values to eliminate parasitic ringing in power electronics circuits. This step-by-step guide covers measuring ringing frequency, estimating stray inductance and capacitance, and selecting Rs and Cs values to damp resonance and reduce EMI.
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Practical Tips

Audio Rectification and TDMA/GSM EMI

Audio rectification is a common EMI problem in which high-frequency RF signals interfere with low-frequency audio circuits, producing audible noise or distortion. This article explains the causes of audio rectification, demonstrates TDMA/GSM effects on speakers, and offers practical EMI mitigation techniques for designers.
Practical Tips

Hidden Start-up Events

Start‑up transients can hide major EMI and reliability problems. By capturing inrush current spikes and high‑frequency events with high‑bandwidth scopes and probes, engineers can uncover failures, resets, and random behavior caused by fast di/dt during power‑up—and design effective fixes.
Practical Tips

CM Versus DM Currents

Why do cables radiate? Common mode currents are the culprit. Through four practical experiments, learn how return paths, grounding switches, and parasitic capacitances determine whether your current stays differential—or becomes a radiating common mode problem.
Practical Tips

Test EMI Profile of Your Systems with Real Loads

When testing EMI performance, substituting real loads with "equivalent" resistors can mislead you by up to 20dB—enough to turn a passing design into a costly failure. This practical guide demonstrates why fans, motors, and other non-linear loads behave dramatically differently than resistors, and why authentic testing matters for accurate results.
Practical Tips

Parasitic Oscillations and EMI Emissions

Parasitic oscillations are a sneaky source of EMI/EMC failures. With the right layout and simple fixes—like reducing gain or breaking feedback loops—you can eliminate emissions without costly redesigns. Learn how to spot and stop these hidden troublemakers in your circuit.
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