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Interference Technology

For EMI / EMC Engineers

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Shielding

New EMI Clip-On Gaskets Come in All Shapes

 

This newly developed clip-on EMI/RFI-shielding gasket programme by Holland Shielding Systems BV, is extremely easy to mount and provides a solid mechanical attachment of the EMI/RFI-shielding gasket. This EMI/RFI-shielding gasket can be assembled without a need for tools, simply by pressing the section manually onto the metal flange of your enclosure - without the use of any … [Read more...]

Compact High Reliability Chip Varistors for Automotive Applications

 

TDK Corporation announced the expansion of its lineup of chip varistors for automotive applications. The AVRH series offers a maximum operating voltage of 19 V to 70 V and a capacitance ranging from 4.7 to 50 pF. The miniature voltage protection device is available in IEC case 1005 (EIA 0402) with compact dimensions of just 1.0 mm x 0.5 mm x 0.5 mm. The high reliability AVRH … [Read more...]

EMC Radiated Emission Measurements at 1/3/5/10/30 Meters

 

INTRODUCTION There are two principal types of emission measurements in the world of electromagnetic compatibility, conducted emission and radiated emission. The conducted emission measurements are either a voltage-capacitive tap type of measurement (typically on a power line) or they are a current-clamp type of measurement (typically on a signal line). Radiated emission … [Read more...]

New Small Coupled Power Choke Released

 

WE-DPC HV (Double Power Choke High Voltage) is a magnetically shielded, SMD coupled power choke with two identical windings and a high isolation voltage of 1.5 kV. It is the smallest product of its type in the Würth Elektronik eiSos portfolio. With this power choke in a 5030 package, customers can attain a 40 percent lower DC resistance than products on the market. WE-DPC HV … [Read more...]

Book Review: Foundations of Electromagnetic Compatibility (Adamczyk)

 

OK, this is not a book for the faint-hearted. Bogdan Adamczyk is a professor of engineering and the founder of the EMC Center at Grand Valley State University in Grand Rapids, MI. As such his recent book, Foundations of Electromagnetic Compatibility with Practical Applications (Wiley 2017, ISBN 978-1-119-12078-0) is crammed with derivations of basic electromagnetic … [Read more...]

New Flame-Retardant Shielding Silicone Meets UL 94 V-0

 

Specialty Silicone Products (SSP) now offers a 60-durometer, nickel-graphite shielding silicone that meets the flammability requirements of UL 94 V-0, a flame-testing standard from Underwriters Laboratories (UL). Flame-retardant SSP-502-60-V0 is supplied as a ready-to-mold compound, fully-cured conductive sheet stock, or as continuous rolls. This particle-filled silicone … [Read more...]

Economical EMI Shielding Wire Mesh Gaskets Offered With or Without Elastomer Cores

 

Tech-Etch manufactures EMI shielding knitted wire mesh, which can be used as economical gaskets for EMI/RFI shielding. All knitted mesh configurations are supplied on spools, coils or cut to length as individual gaskets with or without end seals. Standard profiles for a wide variety of applications include round, round with tail, double round with tail, half round (D) and … [Read more...]

Troubleshooting Radiated Immunity for Medical Products – Case Study

 

Introduction Companies making medical products have much more stringent requirements now that the new IEC 60601-1-2 (Edition 4) became effective June 17, 2017. One of the many changes included increased radiated immunity requirements in several specific wireless and communications bands (Table 1). Highlights of all the changes are included in Interference Technology’s free … [Read more...]

New Heat Shrinkable Tubing Technology Introduced

 

Zeus PTFE/FEP Dual-Shrink® tubing is constructed with an exterior of heat shrinkable PTFE and an inner layer of FEP. The PTFE outer layer shrinks tightly over inserted parts while the FEP melts and flows into a solid or near-solid encapsulation. The fit is so tight it can withstand the most severe stresses involving pull or vibration. Dual-Shrink® tubing is designed to provide … [Read more...]

New Family of Electrically Tuned Polymers for Composites Applications Developed

 

ARC Technologies of Amesbury MA has teamed with CompositeTechs LLC of Amesbury MA to promote development of a new series of electrically tuned polymer formulations for the plastics and composites industries. These general formulations can be customized to meet the processing and performance specification requirements for extrusion, injection molding, thermoforming, and … [Read more...]

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