CALL FOR PAPERS: The 21st Annual DoD Electromagnetic Environmental Effects (E3) Program Review will be held 07-11 May 2018 in Huntsville, Alabama, at the Westin Huntsville. Abstracts for the "General Sessions" are now being accepted. Abstracts should be no longer than one page. Abstracts should be submitted to disa.usna.os.mbx.e3coordinator@mail.mil. Twenty-minute timeslots … [Read more...]
Do your people really know how to perform a conducted emissions test to ANSI C63.4 or CISPR 32?
Oftentimes when a new person is hired to perform conducted emissions testing in a laboratory they know little about EMC and even less about how to perform a test. There is a training period where the new person learns how to perform a test using whatever software the lab has been using. The new person is well trained in how to perform the test with the automation working, … [Read more...]
EMI / EMC Issues in an Industrial Automation System
A discussion between Peter Thomas (PROFIBUS/PROFINET expert) and Keith Armstrong (EMC expert), in December 2017 Peter: Hello Keith. I have spent today visiting an industrial plant in the UK. Whilst there I took the opportunity to look at several areas from an EMI point of view. I wondered what you thought of the following: I list below a few observations following … [Read more...]
Do Not Miss the EMC+SIPI 2018 Symposium!
I am really happy because this is my first EMI/EMC blog for Interference Technology. I was invited by Ken Wyatt to contribute periodically and it was really difficult to reject that invitation. Definitely, I am happy. I hope to be able to include in this blog interesting information for all of you because I am sure the new year will come with many EMI/EMC activities, events, … [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...]
Case Study: Poor PC Board Layout Causes Radiated Emissions
In this case study we're going look at some recent radiated emissions fault finding we performed for a customer. This highlights how one might go about the fault finding process, some of the considerations you might have when coming up with a solution, and how poor PCB layout can give you an emissions headache. Background A new customer discovered a radiated emissions problem … [Read more...]
Simulation in EMC
INTRODUCTION Digitization and the spread of pervasive computing is at the forefront of the technology innovation that will shape our modern universe and it is already manifesting itself in IoT, 5G and autonomous vehicle spaces, to name just a few areas. As this spread of technology increases, so does the need to regulate it – in terms of how these devices and systems … [Read more...]
Determining Semi-Anechoic Chamber Resonance as a Source of Radiated Emission Measurement Variation Between Chambers and Comparing to OATS Measurements
INTRODUCTION This article describes the lack of an acceptable correlation between anechoic chamber and open field test site radiated emission measurements, which were described in reference 1 in 2000, as well as a lack of correlation between chambers. It was found that emission measurements, which were over the limits in one facility, would pass in another. The lack of a … [Read more...]
EMC Radiated Emission Measurements at 1/3/5/10/30 Meters
Introduction to EMC Radiated Emission Measurements 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 … [Read more...]
Resilience is Key to the Connected and Autonomous Revolution
INTRODUCTION Connected and autonomous vehicles have long been hailed as the answer to safe transport. Around 1.25 million people die in road traffic accidents worldwide each year according to E&T– and driver error accounts for over 90 per cent of those deaths[1]. In theory, the removal of the driver as the lead decision maker for vehicle control should reduce this number, … [Read more...]
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