The passive nature of fiber optic technology provides a fundamental solution to interference plagued transmission problems DENNIS HORWITZ, MICRONOR INC. IN MANY INDUSTRIAL automation or motion control applications, equipment can be exposed to EMI generated by nearby equipment. These noisy electrical environments can induce errors in the communications link between the … [Read more...]
3D EM Simulation Software Accelerates High-Frequency Design
Agilent Technologies Inc. recently announced Electromagnetic Professional (EMPro) 2010, a new release of its 3D electromagnetic modeling and simulation software for analyzing the 3D EM effects of IC packages, connectors, antennas and other RF components.Learn more from Agilent Technologies. … [Read more...]
Cat5e Ethernet Patch Cables Available
AutomationDirect now offers Cat5e Ethernet patch cables. The straight and crossover patch cables support up to 1,000 Mbps, and are designed to reduce the effects of electromagnetic interference by incorporating a single metal foil shield that wraps around the entire set of four twisted shielded pairs.Learn more from AutomationDirect. … [Read more...]
New Edition of Communications Cable EMC Standard
The International Electrotechical Committee recently released the IEC 62153-4-1 standard covering the electromagnetic compatibility testing methods for metallic Communications cables. This second edition, according to the IEC, cancels and replaces the first edition published in 2003. The significant change is a new clause on the background of the shielded screening attenuation … [Read more...]
The Square Shielded Magnetic Loop
Simple square wire loops may be well suited for injecting signals into circuit boards by inductive coupling. Douglas C. Smith, D.C. Smith Consultants, Los Gatos, CA CONSTRUCTION DETAILS Square magnetic loops are very useful troubleshooting tools. This article will describe the construction and characteristics of shielded magnetic loops and compare them to unshielded magnetic … [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...]
2010 Update on IEMI and HEMP
INTRODUCTION It has been three years since the state of the art dealing with IEMI and HEMP has been updated in the Interference Technology Annual EMC Guide in 2007 [1]. A significant amount of work has been accomplished worldwide during this period. This paper will review significant special sessions and tutorials at International EMC Conferences, published papers and reports, … [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...]
In-situ EMC Testing Using Surface Current Sense Wires
Mart Coenen, EMCMCC bv, Eindhoven, the Netherlands Tim Maas, ASML bv, Veldhoven, the Netherlands Yili Hu, Student Eindhoven University of Technology, the Netherlands Arthur van Roermund, Eindhoven University of Technology, the Netherlands ABSTRACT In-situ EMC testing is, for large fixed systems and installations within the scope of the European EMC Directive, not a primary … [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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