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Interference Technology

For EMI / EMC Engineers

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Shielding

Review of Space Applications EMC Requirements

 

The Contract Having been a long-time manufacturer of oxygen concentrator equipment, when I saw an opportunity to bid on a job to provide an oxygen concentrator system (OCS) for a satellite project I jumped at the chance. The specifications were normal for this type of system and of course electromagnetic compatibility (EMC) requirements were included. Having experience with … [Read more...]

HEMP Protection Strategy for Power System’s Electronic Equipment

 

Annotation The issue of protecting electronic equipment from the electromagnetic pulse of a high-altitude nuclear explosion is very relevant and important for the power industry. Current knowledge about individual HEMP protection elements, their specifications and application features is very important, but, at the same time, limited to ensure efficient protection of power … [Read more...]

Software-Defined Analog Filters to Modernize and Improve Radio Filters

 

Filters are some of the most common components found in wireless system designs. They are typically used to block interference from various sources. As limited spectrum resources are allocated to ever increasing number of users, more conflicts between these users arise and more filters are constantly needed. Nowadays, interference is quite common between cellular base stations, … [Read more...]

Cable Discharge Event (CDE)

 

Abstract Worst-case Cable Discharge Events (CDE) are poorly understood by most of the product developers as the definition of what is about to happen when you plug in a cable into an appliance’s socket. It is NOT the electro-static charge which could be expected on the cable: outer/inner shield(s) + internal wires, while the cable is fully floating prior to the cable … [Read more...]

Conformal Conductive Coating and EMI Shielding

 

This is a diverse and promising space. In one manifestation, spray-on inks are targeting package-level EMI shielding. Here, they hope to displace sputtering, the incumbent, which benefits from sunk CapEx and lower material consumption costs. They offer low CapEx production in atmospheric conditions and better conformal coverage. Others are developing inkjet printing solutions, … [Read more...]

Updated 52-Page Catalog of EMI/RFI Shielding Solutions

 

Plymouth, MA.... Available in both interactive PDF and printed versions, the 2018 catalog details all standard and custom EMI/RFI shielding product options. The PDF format lets the user click to download interactive sales drawings on over 150 products, including finger stock profiles, metalized fabric gaskets, fan vents, and board level shielding. The Table of Contents, Part … [Read more...]

Shielding Cabinets to Fold Yourself

 

Würth Elektronik eiSos ShielDIY extends the range of shielding cabinets Waldenburg (Germany), 20 September 2018 – As the number one address in all EMC matters, Würth Elektronik eiSos has an extensive range of shielding cabinets in its program. The cabinets are made of thin, tin-plated sheet metal (certified to DIN EN 10202/10203) and represent an easy-to-implement EMC … [Read more...]

Rack Cover- Portable RF Shielded Enclosure

 

The V Technical Textiles, Inc. (VTT) brand of Rack Cover Portable RF Shielded Enclosure is a self contained portable enclosure designed for covering equipment racks. These enclosures are constructed using high quality Shieldex® shielded material provided by Statex Productions + Vertriebs GmbH in Bremen, Germany. The enclosure is available in multiple sizes, layers, and … [Read more...]

Classical Shielding Theory vs. Near-Field Measurements

 

This article addresses the fundamental concepts underlying the classical shielding theory based on Schelkunoff’s equations [1]. In order to assess the applicability of these equations, an understanding of their origin, assumptions made in their derivations, and their limitations, are needed. This tutorial article addresses each of these points. The goal is not to show the … [Read more...]

UNECE Regulation 10: Electrical/Electronic Sub-Assembly Radiated Emissions Testing (Annexes 7 and 8) and Radiated Immunity Testing (Annex 9)

 

In this installment in the series of blogs on UNECE Regulation 10, Revision 5, Amendment 1 (8 October 2016), hereafter referenced as R10.05, we will look at radiated emissions and immunity testing of Electrical/Electronic Sub-Assemblies (ESAs).   ESA RADIATED EMISSIONS (Annexes 7 and 8) Like the vehicle radiated emissions testing annexes, R10.05 has separate … [Read more...]

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