The many devices used in an industrial setting can present significant challenges in emissions control. Vinod Kumar Dhar Electronics Regional Test Laboratory (West), Indian Ministry of Information Technology, Mumbai, India While controlling electromagnetic interference is a worldwide challenge encountered in homes, shops, and offices, that task can be particularly difficult … [Read more...]
Satellite System Passes EMI, Acoustic, & Thermal Testing
In other news emphasizing the growing significance of satellite communications, the Boeing Company has announced that a Boeing-led team has completed the final testing and integration of the Space Based Space Surveillance (SBSS) system under development for the U.S. Air Force. When launched, the SBSS is intended to revolutionize U.S. space situational awareness by providing … [Read more...]
Selecting Antenna/Power Amplifier Combinations for the Coming New RF Immunity Standards
Though far from certain, it looks as if 6 GHz is a strong candidate for the upper frequency for consumer products. Art Cohen A.H. Systems, Inc., Chatsworth, CA, USA Thomas Mullineaux Empower RF Systems, Inc. Inglewood, CA, USA Testing products for susceptibility to radiated fields above 1 GHz is on the horizon. The new medical standard now stipulates testing to 2.5 GHz, and … [Read more...]
Input Power – It’s More Than Just a Line Cord
The power distribution and control function has matured into a full-fledged design discipline. Roger Edelson Edelson Associates, Los Angeles, CA, USA Power distribution and control (and the associated cable management function), while not a sexy topic, has grown into a recognizable, and important, subset of industrial equipment design. Power distribution and control … [Read more...]
Coping with Reflected Power in RF Immunity Systems
EMC system engineers face trade-offs when selecting high power amplifiers for RF immunity testing. During testing, the amplifier must withstand high levels of reflected power. An appreciation of how reflected power affects an amplifier is important if well-informed decisions are to be made. This article uses a simple thought experiment to de-mystify this complex phenomenon and … [Read more...]
Design Considerations for Minimizing Large Aperture Effects in Shielding
Large aperture arrays can present special shielding challenges Ron Brewer, Laird Technologies, Delaware Water Gap, PA Shielding can be used at the systems or PC board level to protect sensitive equipment or circuits from both internal and external RF sources. Large systems can be placed in shielded rooms or even shielded buildings. However, regardless of the size of the … [Read more...]
EMC Design Considerations for Medical Products
Collocation of sensitive medical electronic devices can result in equipment malfunction in medical settings ANTHONY A. DIBIASE INTERACTION BETWEEN MEDICAL products and their electromagnetic environment (EME) presents new challenges to medical device manufacturers, medical service providers, and the regulatory authorities who are responsible for insuring the health and safety … [Read more...]
EMI Filters for Cardiac Pacemakers and Implantable Defibrillators
The use of ceramic feed-through capacitors, as well as specific filter designs and installation techniques, can make cardiac pacemakers immune to EMI ROBERT A. STEVENSON, Maxwell Technologies Carson City, Nevada, USA Under the coordination of Wireless Technology Research, L.L.C. (WTR), the interaction between cellular phones and cardiac pacemakers has been widely … [Read more...]
