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Shielding

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...]

UNECE Regulation 10: Vehicle Radiated Emissions & Immunity Testing (Annexes 4, 5 and 6)

 

Having dealt with the administrative side of Type Approval to UNECE Regulation 10, Revision 5, Amendment 1 (8 October 2016), hereafter referenced as R10.05, in the first three blogs in this series, this installment begins looking at the tests themselves commencing with the radiated emissions requirements of Annexes 4 and 5 and radiated immunity requirements of Annex … [Read more...]

UNECE Regulation 10: Worst-Casing

 

Before applying for a new Type Approval, or extension of an existing certificate, the applicable tests must be agreed with the Technical Service. A later blog in this series will cover the subject of approval extensions, so for this post we will consider new approvals. Where a manufacturer has multiple variants and/or configurations, worst-casing can significantly reduce … [Read more...]

UNECE Regulation 10: Conformity of Production

 

In this second blog in the series on Type Approval to UNECE Regulation 10, Revision 5 we will cover the subject of Conformity of Production (CoP) and explain why it is a critical part of the Type Approval process. The requirement for CoP is a fundamental element of the 1958 Agreement and the procedure is set out in Schedule 1 therein. Approval Authorities are required to … [Read more...]

UNECE Regulation 10: The Type Approval Process

 

Welcome to the first in a series of blogs on UNECE Regulation 10. In the first few blogs we will cover the fundamentals of Type Approval and the processes involved in obtaining an 'E' mark.  Subsequent blogs will cover the various EMC test requirements set out in UNECE Regulation 10, Revision 5 (hereafter referred to as R10.05) in detail. Testing is only part of the … [Read more...]

Call For Authors/Bloggers – Editorial Submissions to Interference Technology Magazine

 

In over 45 years of publication, Interference Technology has earned a reputation for publishing only the highest quality technical articles that focus on practical and innovative technological developments in the EMC, EMI, and RFI fields. Product designers and EMC/compliance engineers have come to rely on Interference Technology as a source of quality, unbiased, non-commercial … [Read more...]

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...]

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