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Interference Technology

For EMI / EMC Engineers

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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...]

Redesigned "S" Series Amplifiers Offer Coverage 4 – 18 Ghz

 

AR RF/Microwave Instrumentation has redesigned several of its "S" Series amplifiers to extend the bandwidth from 18 GHz down to 4 GHz. The models previously went down to 6 GHz. The redesigned amplifiers are:Model 5S4G18 (5 watts CW, 4 - 18 GHz) (formerly model 5S6G18A)Model 10S4G18 (10 watts CW, 4 - 18 GHz) (formerly model 10S6G18A)Model 20S4G18 (20 watts CW, 4 - 18 GHz) … [Read more...]

Transceiver with Integrated Driver Designed for Lower EMI

 

Texas Instruments introduced an isolated half-duplex differential line transceiver with integrated transformer driver, which provides the smallest isolated signal and power system design with highest efficiency and lowest electromagnetic interference.The ISO1176T is well-suited for long transmission lines because the ground loop is broken to allow the device to operate with a … [Read more...]

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