Arturo Mediano received both his M.Sc. (1990) and his Ph. D. (1997) in Electrical Engineering from the University of Zaragoza, Spain. He has been involved in design and management responsibilities for R&D projects with companies in the radiofrequency (RF) and EMI/EMC fields for communications, industry and scientific/medical applications since 1990.
In this practical tip from InCompliance magazine, instructor Arturo Mediano discusses the importance of using the actual load of your device rather than substituting and equivalent resistor when testing for EMI.
In this article for InCompliance magazine, instructor Arturo Mediano gives a brief introduction to the causes of parasitic oscillations in circuits.
Note: if you find yourself wanting to convert the dBuV values in the article to dBm or something else, you can use our new calculator for that!
In this article for InCompliance magazine, instructor Arturo Mediano discusses how using higher quality components with low parasitics can actually cause problems in your system by ringing.
In this article, instructor Arturo Mediano shares a tip on how you can use the vector network analyzer to gauge the shielding effectiveness of different materials.
Successfully troubleshooting EMI/EMC problems isn't easy. You need time, you need a strategy, and you need to remain calm. Sometimes, you need a special "sixth sense" that only comes from experience because in some cases, your problems aren't even related with the EUT (equipment under test).
Article by instructor Arturo Mediano about near-field scanners.
I love near field probes because they let me "see" magnetic and electric fields with an oscilloscope or with a spectrum analyzer. They let locate sources of emissions in board, cables, and systems. Near-field scanners also let you see emissions, particularly all over a board. That's hard to do with a single probe.
Arturo Mediano teaches courses on EMC/EMI and Signal Integrity for Besser Associates. He is a frequent contributor to industry magazines and journals on these topics. This article appears in the "Practical Tips" section of InCompliance magazine.
Ferrites for EMI suppression are usually chosen looking for high (resistive) impedance at the frequency of interest; but, sometimes, that ferrite is not working as expected. Perhaps you have saturation effects?
Arturo Mediano is a professor at University of Zaragoza (Spain) and founder of The HF-Magic Lab®, a specialized laboratory for design, diagnostic, troubleshooting, and training in the EMI/EMC/SI and RF fields. He is also an instructor for Besser Associates (CA, USA) offering public and on site courses in EMI/EMC/SI/RF subjects.
Instructor Arturo Mediano has written an article for In Compliance magazine:
Digital and power electronic systems can reduce the radiated and conducted emissions profile using spread spectrum techniques. Typically, no more than 10-12dB can be obtained with those techniques but the result can be useful to comply with regulations...
Instructor Arturo Mediano has published an article with In Compliance magazine on reducing VHF EMI from a flyback power supply.
Usually, EMC design guidelines in flyback literature are related with the switching effects of the output transistor to minimize emissions for conducted tests in the 9 kHz to 30 MHz range. But failure in radiated emissions in the VHF range is typical when testing the product for EMC compliance.