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shielding

Things You May Not Have Heard About Shielding

What determines how effective a cable shield is going to be? And how does the decision to ground or not ground a shield impact its effectiveness? Fortunately, there is a well-developed theory of shielding, which will be discussed as a way to get a general understanding of what can be expected of shield performance. But there’s more to it.

Global EMC Shielding Market to Reach $3.79M by 2016

MarketsandMarkets has released a market research report that states the global electromagnetic compatibility (EMC) shielding market is expected to grow to $3.79 million in 2016 from $2.35 million in 2009. The market segment with the highest growth potential is conductive coatings and paint with an estimated CAGR of 8% from 2011 to 2016.

The Basic Principles of Shielding

1403 F4 coverToday’s electrical and electronic devices are subject to mandatory EMC requirements throughout the world. Many devices operate at high frequencies and are very small. They are placed in nonconductive plastic cases providing no shielding. Essentially, all these devices cannot meet these mandatory requirements or they may cause interference to other devices or receive interference causing susceptibility problems without a proper program of EMI control. This program consists of identifying the “suspect” components and circuits that may cause or be susceptible to EMI. This is completed early on in the program to allow for an efficient design in keeping the cost of dealing with EMI as low as possible. A complete EMC program consists of proper filtering, grounding and shielding. This article will discuss the latter, but the other factors cannot and will not be ignored or given insufficient priority.

High Performance Enclosure Gaskets from Leader Tech

An important factor to consider in the design of an electronic enclosure is its...

A 1kV Discharge Directly onto a Staple Leads to Increased Energy Penetration Inside Metallized Static Shielding Bags

1311 F2 coverEditor’s Note: Due to the overwhelming amount of positive feedback from the September 2013 issue of In Compliance (pp. 42-48), a follow-up article with additional lab testing by the author was necessary to respond to an aerospace prime.

Thank you for your informative article on “Pin Holes & Staples Lead to Diminished Performance in Metallized Static Shielding Bags.” Have you considered what happens if there is an ESD discharge to the staple in a bag?

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Pin Holes & Staples Lead to Diminished Performance in Metallized Static Shielding Bags

1309 F4 coverAs early as 1985, the author recalls re-occurring discussions of the effects of puncture holes from component leads and stapling of static shielding bags.

In July 2013, the ESD Experts page on LinkedIn® started a discussion by a USA computer manufacturing company that generated participation from end users, suppliers and consultants both here and abroad. In years past, some held opinions that pin holes do not greatly affect static shielding of metallized bags. There is, however, minimal published data to fall back upon regarding this subject matter.

Travels with Frosty: Days in Turkiye

Frosty and I went to Turkey to do a little shielding work. “Travels with...

Assessing the EMC Performance of PCB Shields by Electromagnetic Modeling

In the past EMC Engineers have relied on metallic enclosures to contain electromagnetic fields and meet radiated emissions limits in military and consumer products. Modern commercial electronics products typically use molded plastic enclosures since they are considered to be aesthetically more pleasing than a metal enclosure, but also to save weight and cost.

Circuit Models Make Shield Design Simple

Please view the Digital Edition to read the article (click here).

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