In over 45 years of publication, Interference Technology has earned a reputation for publishing only the highest quality technical articles that focus on practical and innovative technological developments in the EMC, EMI, and RFI fields. Product designers and EMC/compliance engineers have come to rely on Interference Technology as a source of quality, unbiased, non-commercial … [Read more...]
Interference-Suppressed Thick Cables with Snap Ferrite
STAR-TEC, the patented snap ferrite (with key) for supplementary interference suppression on the cable, is a classic in the Würth Elektronik eiSos program. The STAR-TEC product family has now been extended with three additional versions for cables of diameters from 12 to 25 mm. The EMC ferrites serve for supplementary interference suppression in the 1 MHz to 1 GHz range. The … [Read more...]
New Series Capacitor Exhibits Low ESR/ESL, Low Noise, High Self-Resonance
Passive Plus, Inc. (PPI) is now offering the 0708N (.070” x .080”) series capacitor. These parts exhibit Low ESR/ESL, Low Noise,High Self-Resonance as well as ultra-stable performance over temperature. These capacitors are 100% RoHS compliant. Usually used for wireless broadcasting equipment, mobile base stations, GPS, MRI, and Radar applications and offered in magnetic and … [Read more...]
Book Review: Foundations of Electromagnetic Compatibility (Adamczyk)
OK, this is not a book for the faint-hearted. Bogdan Adamczyk is a professor of engineering and the founder of the EMC Center at Grand Valley State University in Grand Rapids, MI. As such his recent book, Foundations of Electromagnetic Compatibility with Practical Applications (Wiley 2017, ISBN 978-1-119-12078-0) is crammed with derivations of basic electromagnetic … [Read more...]
Troubleshooting Radiated Immunity for Medical Products – Case Study
Introduction Companies making medical products have much more stringent requirements now that the new IEC 60601-1-2 (Edition 4) became effective June 17, 2017. One of the many changes included increased radiated immunity requirements in several specific wireless and communications bands (Table 1). Highlights of all the changes are included in Interference Technology’s free … [Read more...]
Selecting the Proper EMI Filter Circuit For Military and Defense Applications
Introduction Insertion loss, the term used to express a filter’s ability to reduce or attenuate unwanted signals, has traditionally been measured in a 50 ohm source and 50 ohm load impedance condition, as standardized in MIL-STD-220. In this matched 50 ohm impedance condition, various types of filter circuit configurations, single capacitor, “L’s”, “PI’s”, and “T’s”, will … [Read more...]
EMP/HEMP Filter Meets Mil-STD-188-125, E1 & E2 Pulse Test Requirements
API Technologies’ model 52-1700-XXX High-altitude Electromagnetic Pulse (HEMP) Filters are designed to protect sensitive electronics equipment during hazardous transient conditions. They are employed to absorb a potentially destructive overshoot voltage. Under normal operating conditions, the suppressor circuit exhibits high off state impedance that appears transparent to … [Read more...]
Input Filters – The Key to Successful EMC Validation
Co-authored by: Ranjith Bramanpalli & Steffen Schulze Würth Elektronik INTRODUCTION Input filters are today as ever a requisite factor for successful EMC validation of switching controllers, irrespective of the size of the AC component involved. Switching controllers create conducted EMC interferences due to AC components in their lines, independent of their individual … [Read more...]
EMI Troubleshooting – Step-By-Step
In this article, I’ll describe the steps I usually take to troubleshoot the top four EMI issues, conducted emissions, radiated emissions, radiated immunity, and electrostatic discharge. Of these, the last three are the most prevalent issues, with radiated emissions typically being the number one failure. If your product or system (EUT) has adequate power and I/O port filtering, … [Read more...]
New Series of Vector Network Analyzers Released
Legendary support and quality meet ease-of-use and affordability. The Tektronix TTR500 Series 2-port, 2-path vector network analyzer is our latest breakthrough – an unmatched combination of measurement performance and convenience at 40% lower price than leading benchtop alternatives! It’s used to measure filter and antenna response, as well as shielding effectiveness, as … [Read more...]
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