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Interference Technology

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Gaps In Return Planes – Bad News for EMI

 

Currently, there is an ongoing discussion among SI and EMC engineers on the fine points of PC board design for best signal integrity and EMI performance. Among the topics it seems designing in gaps or slits in ground return planes always comes up. Gaps can also occur mistakenly due to the addition of some connectors or other object that creates gaps in the copper. In fact, … [Read more...]

Measuring Cable Resonances With A Comb Generator

 

(October 28, 2016) Cables are one of the key metallic structures on a product that can act as an antenna and couple energy, causing radiated emissions and possible compliance test failures. This has been discussed extensively in the literature on product design for EMI compliance. In many cases, they can resonate at their half-wave frequency and actually amplify any harmonic … [Read more...]

Metalized Fabric Over Elastomeric Gaskets Offered

 

Tech-Etch has been offering Metalized Fabric over Elastomer Gaskets as standard strips with seven different profiles, Standard D-Connectors to shield most 9-pin through 50-pin connectors, and custom configurations die cut to customer specifications. Strips come in many standard sizes for the following profiles: Square, Rectangular, Flat, D, C-Fold, Knife-Edge, and … [Read more...]

Blog Post – DC-DC Converter Noise Evaluation

 

By Kenneth Wyatt More of my clients are starting to use small third-party DC-DC converters to provide the multitude of voltages required for today’s processor and DDR RAM ICs. While these are convenient to drop onto a circuit board, they can be quite a source of radiated and conducted emissions – especially those that switch in the MHz range... To read the full blog post, … [Read more...]

EMC Standards Package

 

This EMC Standards package includes standards that address the unintentional generation, propagation, and reception of electromagnetic energy, the associated unwanted effects, and the correct operation of different equipment involving electromagnetic phenomena in their operation. In the package: 220+ active, draft, and archived IEEE and ANSI EMC related standards; robust … [Read more...]

New CENELEC Standards Recently Released

 

Rein Tech Laboratories recently listed several updates to standards in their July 2016 newsletter “MultiPoint”. Among them are the following updates as published by CENELEC. There are additional standards updates listed for IEC and ETSI standards. This is a shortened list of the CENELEC standards published or made available during the past month: EN 62610-5:2016 - 6/24/2016 … [Read more...]

Interference Technology’s Top 5 Articles

 

The top five “clicked-on” articles since 2005 include information on high frequency current probes & applications, RTCA/DO-160 update, electromagnetic interference sources and their most significant effects, designing electronic systems for EMI, and radiated emissions measurements from 1 to 30 meters. To read the articles and more about them, click here. … [Read more...]

FDA Finalizes Guidance In Supporting Claims Of EMC

 

The U.S. Food and Drug Administration (FDA) has issued final guidance in supporting claims of electromagnetic compatibility (EMC) of medical devices. The document is recommended for use in conjunction with consensus standards, as well as other FDA guidance documents pertaining to specific devices. Typically, the FDA reviews EMC information based on the risk of device … [Read more...]

Engineering Company Releases EMI Surveyor

 

(July 14, 2016) Doble Engineering Company announced the introduction of the EMI Surveyor, a non-invasive surveying solution that helps generation and industrial plants optimize maintenance and improve outage planning. The EMI Surveyor can detect more than 70 different electrical insulation and mechanical defects in generators, motors, bus duct systems, … [Read more...]

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