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Interference Technology

For EMI / EMC Engineers

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High-Voltage Fuses for the External Protection of Shunt Capacitors

 

  From the International Electrotechnical Commission webstore: “IEC 60549:2013 applies to external fuses used with high-voltage capacitors according to IEC 60871-1, “shunt capacitors for a.c. power systems having a rated voltage above 1 000 V - Part 1: General.” IEC 60871-1 is applicable to both capacitor units and capacitor banks intended to be used for power-factor … [Read more...]

RF Antenna Incorporates Shielded Room as Reverberating Antenna

 

AR RF/Microwave Instrumentation, a developer of broadband high power, solid state RF amplifiers and microwave amplifiers, has announced the “Cavitenna” RF antenna, a top-loaded monopole antenna that “[utilizes] the shielded room as a reverberating antenna, and the wall as the antenna's ground plane. As a result, it accommodates extremely high power and corresponding field … [Read more...]

EMI Contact Fingers Help Prevent Interference Between Nearby Embedded Systems

 

Würth Elektronik, a provider of EMC components, has announced the WE-SECF series of EMI contact fingers for the prevention of interference between embedded systems or conductive housings installed next to one another. According to the company, the WE-SECF series is made of copper-berylium and is gold-plated, giving the material a very low resistance and the ability to … [Read more...]

FCC Issues Final Ruling on U.S.-Mexico Border Spectrum Sharing

 

The Federal Communications Commission has issued a final rule that will “reconfigure” the 800 MHz band to prevent public safety agencies from interfering with cellular technology licensees. The ruling follows almost nine years of deliberations within the U.S. government and the signing of an international agreement by U.S. and Mexican officials. “As with channel plans … [Read more...]

Army Repeaters Cited as Cause of Garage Door Opener Issues in Georgia

 

Army officials confirmed last month that a recent radio tower equipment upgrade at the Hunter Army Airfield in Savannah, Ga., was the source of interference affecting the garage door openers of hundreds of homeowners in nearby neighborhoods. Ron Elliot, director of public affairs for Hunter Army Airfield and Fort Stewart, reported that new, stronger repeaters were installed on … [Read more...]

The Ground Loop

 

Several readers have made comments regarding multipoint grounding (MPG) systems.  The concern is that this arrangement creates multiple ground loops.  As a result, we need to address that.  As some of you know, I make a lot of presentations and teach a lot of EMC seminars.  A long, long time ago, I was discussing ground loops in one of my training classes … [Read more...]

New EU Directive for Electromagnetic Field Exposure Proposed

 

A new directive on the minimum health and safety requirements for the exposure of workers to electromagnetic fields has been approved by the European Union member state’s permanent representatives, the Council of the European Union has announced. The draft directive will need to be formally approved by the European Parliament and the Council of the European Union before coming … [Read more...]

EOS/ESD Symposium for Factory Issues

 

Title: EOS/ESD Symposium for Factory IssuesDate: October 28 - November 01 2013Location: George Town, Penang, MalaysiaDescription: “The EOS/ESD Symposium for Factory Issues is focused on discussing the issues and providing the answers to electrostatic discharge in electronic production and assembly.”Learn More: Click here … [Read more...]

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