Photofabrication Engineering’s EMI/RF shields feature snap-on, snap-off covers, which allow easy access to components within the shields. The company’s “Easy Access” RF shield incorporates an etched slot that is straight or staggered to minimize RF leakage. Applications for the shields include medical and biomedical equipment, as well as aerospace, defense, and commercial … [Read more...]
The Truth About Cell Phones and Cancer
Christopher Wanjek, LiveScience's Bad Medicine Columnist wrote that Ronald Herberman, director of the University of Pittsburgh Cancer Institute, shocked just about all law-abiding scientists (abiding by laws of physics, that is) with his warning last week to his faculty and staff that cell phones might pose a cancer risk.This is troublesome, Wanjek wrote, because this time a … [Read more...]
IEC Updates CISPR 11 Standard
The International Electrotechnical Committee has released an amendment to CISPR 11 – the radio-frequency EMC standard for industrial, scientific and medical equipment operating in the frequency range 0 Hz to 400 GHz and to domestic and similar appliances designed to generate and/or use locally radio-frequency energy.This consolidated version consists of the 2009 fifth edition … [Read more...]
World’s Largest Mobile Phone Study Finds No Brain Cancer Link
The Cancer Council Australia released results of the largest international study into mobile phone use, which has found no evidence that 12 years of normal use can cause brain cancer. It has been suggested that electromagnetic fields associated with mobile phones may play a role in speeding up the development of an existing cancer, but the Interphone study found no evidence to … [Read more...]
The Dip Tube
A formalized materials qualification process is essential in preventing non-conforming or suspect counterfeit packaging that can lead to ESD hazards during parts inspection process, long-term storage issues and failures in manufacturing. Robert J. Vermillion, CPP/Fellow, RMV Technology Group, LLC, NASA-Ames Research Park, Moffett Field, CA The aerospace community has made … [Read more...]
The IET’s Guide on EMC for Functional Safety
When correctly applied, real financial savings can be expected, along with a significant reduction in financial risks. Keith Armstrong, Cherry Clough Consultants, Stafford, UK Electronic complexity is increasing with no end in sight, increasing self-generated noise levels, while the feature sizes in silicon integrated circuits continue to shrink, making them emit more noise … [Read more...]
Extending the Concept of Common Mode Noise: Single Mode
Electronic switching circuits are used for power conversion, data communication and other applications. According to the theory of Fourier Transform, in these circuits, the periodical change of the current/voltage produces harmonics in a wide frequency spectrum. The resultant currents of these harmonics are called conducted emission (CE), and are categorized classically as … [Read more...]
COTS Alternatives to MIL SPEC Flexible Conduit Systems for EMI/RFI Containment
Applications, electrical and physical performance, termination and installation factors of shielded flexible conduits. Linda Sardone, Zero Ground Electronic solutions for military and government equipment and installations are expanding rapidly, and the need for supplemental shielding of cable runs via conduit is moving beyond traditional applications requiring MIL SPEC … [Read more...]
Halogen-Free Embedded Capacitance Material
Design engineers in the electronics industry who are seeking ways to improve power integrity and reduce electromagnetic interference while meeting halogen-free requirements now have a new solution to meet their needs. The 3M Electronic Solutions Division now offers halogen-free* versions of its Embedded Capacitance Material. 3M’s ECM is a thin, capacitor laminate, which can be … [Read more...]
Choosing the Right Chamber for Your Test Requirements
Martin Wiles, Vince Rodriguez, ETS-Lindgren Developments within standards community has led to new chamber validation procedures above 1 GHz and alternative test methods using FARs. INTRODUCTION Anechoic chambers are used today for performing EMC measurements according to a variety of published EMC standards. There are many different fields of application, including … [Read more...]
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