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A National Plan for EMP Protection (Part 2) – Protection of Buildings

 

Don White Consultant, Don White Consultants Jerry Emanuelson Consultant Part 1 of this article addressed a proposed national plan for U.S. EMP protection. Part 2 of the article presents methods and techniques for EMP protection of buildings, solar rooftops and other structures. As such, Part 2 covers details of shielding, bonding, grounding, and cable or device surge … [Read more...]

Mitigating Excessive Emissions, 2nd Edition

 

Donald L. Sweeney and Marilyn Sweeney D.L.S. Electronic Systems, Inc. Mitigating Excessive Emissions was originally written in 1988 and presented at the IEEE EMC Symposium in Atlanta Georgia. The concept and paper have been used by the author hundreds, if not thousands, of times to illustrate what he calls “The Barbell Model.” This illustrates, in very simple terms, how … [Read more...]

Graphene May Boost RF Absorption

 

New research from scientists in the UK examines graphene’s ability to absorb electromagnetic radiation with the creation of optically transparent broadband absorbers operating in the millimeter frequency range. Since graphene's isolation by University of Manchester scientists in 2004, research efforts worldwide have focused on harnessing its unique electrical, optical, … [Read more...]

Flexible Ferrites Offer EMI Shielding and Noise Suppression

 

Fair-Rite Products Corporation has announced the availability of new flexible ferrites. Available in four thicknesses and six material grades, the RoHS-compliant flexible sheets block noise at lower frequencies and absorb it at higher frequencies. The NiZn ferrite is placed between a 0.01 mm layer of PET film and 0.02 mm adhesive tape. Each sheet can be cut to size enabling it … [Read more...]

EMI Absorption Tape & Sheets Feature Dual-Layer Design for Maximum Noise Mitigation

 

Molex Inc. has released new HOZOX electromagnetic interference absorption tape and sheets designed for use by manufacturers of high-frequency equipment in industries such as medical, consumer electronics, data-telecommunications and microwave/RF. According to the company, the new HOZOX absorption technology incorporates a unique magnetic-conductive dual-layer design to … [Read more...]

To EMP or Not to EMP… Is That the Question?

 

So what are our thoughts on the threat of an electromagnetic pulse event (God forbid) causing some sort of catastrophic damage to our telecommunications, power, and whatever other kind of electronic infrastructure that might be out there? I know, I know…it depends who you talk to! Being in the EMC business, I’d like to believe that I understand the fundamental issue (danger) … [Read more...]

IEC TS 62153-4-1:2014(E): Metallic Communication Cable Test Methods – Part 4-1: EMC – Introduction to Electromagnetic Screening Measurements

 

From the International Electrotechnical Commission webstore: "IEC TS 62153-4-1:2014(E) deals with screening measurements. Screening (or shielding) is one basic way of achieving electromagnetic compatibility (EMC). However, a confusingly large number of methods and concepts are available to test for the screening quality of cables and related components, and for defining their … [Read more...]

RF Shielding Tent Attains -98.9 dB in 800-2,400 MHz Cellular Band

 

Select Fabricators, Inc, a provider of RF portable fabric shielding solutions, has achieved IEEE 299 -20061 certification for its Select-A-Shield portable tent enclosure via an independent testing laboratory. Test results include -98.9 dB average RF signal shielding at commonly-used cellular and Wi-Fi frequencies of 800 – 2400 MHz and minimum signal attenuation of -85 dB over a … [Read more...]

EMI/RFI Shielding Silicones Meet MIL-DTL-83528 Specifications

 

Elasto Proxy, a supplier of specialty seals and custom insulation, has released new EMI/RFI shielding silicones that meet the MIL-DTL-83528 specification for electrically-conductive elastomeric gaskets with shielding. Aerospace, military, electronics, and communications equipment customers who need EMI/RFI conductive silicone compounds can chose ultra-thin sheets and rolls … [Read more...]

Shielding Materials Protect Electronics in Radiation-Rich Environments

 

Engineers at the U.S. Department of Energy’s Thomas Jefferson National Accelerator Facility have announced the development of new shielding materials to protect sensitive electronics from damage in high-radiation environments such as nuclear power plants, particle accelerators and medical applications. According to Jefferson engineers Paul Brindza and Bert Metzger, the three … [Read more...]

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