William A. Radasky IEEE Life Fellow WHAT IS IEMI? In recent years, Hollywood has indicated that criminals and terrorists could use electromagnetic (EM) weapons to black out a portion of Las Vegas (Ocean’s 11) or take down a counter-terrorism computer center (24). Is this fact or fiction? It turns out that Hollywood in this case is leading the public and police agencies in … [Read more...]
Antenna Coupling Inside an Aircraft Using ACA Direct Method
Pascal De Resseguier, Entares Engineering, Toulouse, France Yannick Poiré and Samuel Leman, Nexio, Toulouse, France ABSTRACT A proper study of electromagnetic interferences inside an aircraft has become essential with the recent increase of electronic devices on board. Their effects on the airplane communication and electronic systems need to be considered at an early stage … [Read more...]
EMC at IC Level – Part 1: Pulse Immunity of ICs in Different Packages
Note: The below article has been translated from German and can be found in its original language in the 2011 EMC Europe Guide. Part 2 of this article can be found here. Sven König, Langer EMV-Technik GmbH, Bannewitz, Germany INTRODUCTION Nowadays, micro-controllers are omnipresent. Whether in MP3 players, mobile phones, washing machines or cars, the small controllers … [Read more...]
Distributed Decoupling Capacitor Effectiveness
The effect of connection inductance and ESL can limit the effectiveness of decoupling capacitors. Bruce Archambeault, Ph.D., IBM Research, Triangle Park, North Carolina, USA INTRODUCTION Decoupling capacitors serve two purposes. One is to provide charge to the ICs for functionality, and the second is to maintain a low impedance between power and ground-reference planes in … [Read more...]
Significance of Dielectric Materials for In-Vehicle Electromagnetic Field Computation
Studies suggest that models based on only the metallic parts of a vehicle can provide useful data for predicting the electromagnetic performance of complex systems such as vehicles. Alastair R. Ruddle, Ph.D., MIRA Limited, Nuneaton, UK Numerical modeling is an increasingly popular approach for investigating electromagnetic issues in complex systems. Possible applications … [Read more...]
A Short History and Review of Shielded Cables
Effective Shielding prevents interference from entering or emanating from a cable. Don Dodge, Calmont Wire and cable, Inc., Santa Ana, California, USA HISTORY In the late 1800s, as the use of electricity was first being used for communications, interference reared its ugly head. The imperative for some form of mitigation became apparent. The first attempts involved wire … [Read more...]
Properly Applying Surge Protective Devices (SPDs) in a Health Care Facility
Protecting electrical systems within a facility is paramount to ensure equipment operation and longevity. Bryan Cole, Technology Research Council, Nichols, New York, USA Jim Tiesi, Emerson Network Power Surge Protection, Binghamton, New York, USA Surge protective devices (SPDs) are utilized in numerous applications: commercial buildings, telecommunication shelters, industrial … [Read more...]
RF Shielding Materials: An Update on Selection and Cost Consideration
RF gasket selection must be a well-informed decision in the design process. Gary Fenical, Laird Technologies, St. Louis, MD, USA Advances in electronic components continue to occur at a rapid pace, and this ongoing rush means more and more wireless devices, increasing power levels, and higher frequencies. While consumers demand more advanced products with increased features … [Read more...]
RF Emission Reduction Techniques for ARM-Based Microcontroller Applications
A system's immunity can be enhanced without causing any functional drawbacks. Mart Coenen, EMCMCC bv, Eindhoven, the Netherlands INTRODUCTION With today’s digital designs and the time frame available for design-in, electrical system engineers and PCB designers are more or less forced to follow the application concepts provided by embedded device manufacturers. The … [Read more...]
The NRTL Program
A clear understanding of OSHA safety requirements and the objectives of the NRTL program can render the testing and approval process easier for electronics manufacturers. Regan Arndt, TÜV SÜD America, San Diego, California, USA INTRODUCTION The Occupational Safety and Health Administration (OSHA), an arm of the U.S. Department of Labor, is the primary federal agency … [Read more...]
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