National Semiconductor Corp.’s new 100V half-bridge gate driver is optimized for use with enhancement-mode Gallium-Nitride (GaN) power field-effect transistors (FETs) in high-voltage power converters. National’s new LM5113 is a highly-integrated, high-side and low-side GaN FET driver that reduces component count by 75 percent and shrinks printed circuit board (PCB) area by up … [Read more...]
Automated Radiated Immunity Test System for MIL-STD 461
AR RF/Microwave Instrumentation’s latest automated system for conducting radiated susceptibility testing, the AS18027 AR System, has been specifically designed to perform automated testing for MIL-STD 461 requirements. The system will produce fields up to 50V/m at 1 meter distance from 1-18 GHz. It is comprised of a variety of components including one of AR's new dual-band, … [Read more...]
Ultra-Broadband Conical Inductors
Gowanda Electronics is launching its inaugural line of Ultra-Broadband Conical Inductors at the MTT-S International Microwave Symposium (IMS2011) Exhibition. Gowanda’s new broadband product line offers standard thru-hole, flying lead (self-leaded) and surface mount (SMT) designs in a variety of sizes with up to 150 watt power capability, excellent co-planarity, and robust … [Read more...]
Measurements above 1 GHz in Time-Domain: Theory and Application
Christian Hoffmann, Technische Universität München, Lehrstuhl für Hochfrequenztechnik, Munich, Germany; Stephan Braun, GAUSS Instruments GmbH, Munich, Germany Arnd Frech, GAUSS Instruments GmbH, Munich, Germany; Peter Russer, Technische Universität München, Lehrstuhl für Nanoelektronik, Munich, Germany Time-domain electromagnetic interference (EMI) measurement systems are … [Read more...]
On the Radiation Patterns of Common EMC Antennas
Vincente Rodriguez, ETS-Lindgren LP., Cedar Park, Texas, USA Antennas have been used in EMC measurements since the early days. Knowledge of the antenna pattern was not a requirement of the standards. While MIL STD 461 and some SAE standards called for information on the half power beamwidth, most standards did not require any knowledge of the antenna radiation characteristics. … [Read more...]
A Risk Assessment for Lightning Protection System (LPS)
Bryan Cole, Technology Research Council, Nichols, New York, USA Many articles, papers, and standards have been written and/or developed documenting proper application of surge protection devices (SPDs), identification of SPD performance characteristics, proper SPD safety requirements, etc. However, there are minimal articles on describing when an engineer should specify SPDs … [Read more...]
Going from Analog to Digital
Philip F. Keebler, EMC Group, Electric Power Research Institute, Knoxville, Tennessee USA; Stephen Berger, TEM Consulting, LLC, Georgetown, Texas USA Nuclear power plants (NPPs) in the United States have been undergoing upgrades from analog instrumentation and control (I&C) equipment to digital equipment over the past several years. Upgrades have been occurring on the … [Read more...]
Measurement Uncertainty for Conducted and Radiated Emissions
One of the key elements to making scientific measurements in an EMC lab in today's modern world is having the engineers understand and control the Measurement Uncertainty (MU) of the instrumentation used for making conducted and radiated emission measurements. The emission levels measured by an accredited lab must have measurement uncertainties below certain levels to be … [Read more...]
Wireless Approvals for Japan: A Hiro's Tale
Hiro dug into his soup. “Did your dad fight in the war?” Nodding, slurping up fat udon noodles, “Korea,” pausing and picking up a napkin to dab his chin. “My father was an engineer, highways and bridges, mostly in the North.” Hiro put down his napkin, laid his fast-food chopsticks across his bowl and picked up the chopstick wrapper. He meticulously folded the long paper in … [Read more...]
IEC Offers Pre-Release of CISPR 16-4-2 ed2.0 Standard
CISPR 16-4-2 ed2.0, Title Specification for radio disturbance and immunity measuring apparatus and methods – Part 4-2: Uncertainties, statistics and limit modelling – Measurement instrumentation uncertainty, specifies the method of applying Measurement Instrumentation Uncertainty (MIU) when determining compliance with CISPR disturbance limits. The material is also relevant to … [Read more...]
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