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EMC Society Chapter Technical Meeting

The IEEE Electromagnetic Compatibility Society UK and Ireland Chapter invites you to attend the forthcoming special summer full day event on EMC topics at The Oxford Room, Bucks Rail Centre.

Meeting Agenda.
Arrival from 10:00 Refreshments tea/coffee
10:30 – 10:35 Welcome Roy Ediss, EMC Chapter Chair.
10:35 – 11:15 PLT- where next. John Pink.
11:15 – 12:00 Dual mode crossed HF measuring loop antennas. David Lauder, University of Hertfordshire.
12:00 – 13:00 Lunch Break. Lunch is not provided but food can be purchased in the café which adjoins the meeting room. There are also plenty of picnic areas for a packed lunch.

13:00 – 13:45 Resilience to Electromagnetic Disturbances for reducing functional safety and other risks. Keith Armstrong, Cherry Clough Consultants Ltd.
13:45 – 14:30 Talk 4 TBC
14:30 Short briefing then a provided guided tour, opportunity to look around the site and a steam train ride.
17:00 Site closes.

PLT- where next. – John Pink will provide an update regarding the work in Cenelec on the proposed standard 50561-3, and the introduction of MIMO.
Dual mode crossed HF measuring loop antennas H-field loop antennas covering 9 kHz – 30 MHz can be used for 3 m magnetic field measurements required by CISPR 11 and FCC 18. Active loops have the advantage of broadband operation but these exhibit a relatively high measuring system noise floor. Measuring system noise floor can be reduced substantially by using a resonant loop antenna, which is now mentioned in CISPR 16-1-4 but swept measurements can only be made over a relatively narrow frequency range without retuning.

This session examines the characteristics and applications of a novel 600 mm diameter dual-mode measuring loop antenna with selectable broadband or resonant modes of operation. Two such loops can be placed at right angles to make a pair of ‘crossed’ loops. These allow measurements to be made using
two measuring receivers without the need to rotate the loop antennas about a vertical axis. A pair of ‘crossed’ loops can be mounted on a tripod or on the roof of a vehicle to make mobile measurements. Applications include in-situ measurement of radiated emissions below 30 MHz from telecommunication networks, plasma TVs, solar PV installations, High power Wireless Power Transfer (WPT) systems for electric vehicles, High Voltage DC (HVDC) grid converter stations and wind turbines.

Resilience to Electromagnetic Disturbances for reducing functional safety and other risks – EM disturbances can cause EMI, creating risks for the correct operation of electronic devices and systems. Risks to human health and safety have to be very low indeed, as do many other kinds of risks
(e.g. mission-critical, financial, security, defence, etc.). The discipline of EMC is based on emissions and immunity testing, but modern digital systems cannot be
fully tested, making it impossible to prove that they are safe enough as regards EM disturbances, by
testing alone.

The IEE/IET and the IEC have had teams working on this issue since the mid-90s, and the IET was the first to publish a practical approach, in 2013. This practical approach is being adopted in IEC safety standards for all areas of industry, including medical, and has been developed by the IET into a new Code of Practice on ‘Electromagnetic Resilience’ published earlier this year. Keith’s presentation will outline the major issues, and briefly introduce how EM Resilience works.

Information available on speakers
John Pink has been involved in EMC matters for many years, and has participated as a BSI representative in the long on-going PLT standardisation process with CISPR and CENELEC. This work continues as commerce strives to increase throughput, and the European Union mandates the need for standards that are permissive for the industry. He has a particular interest from a radio users perspective in maintaining usable spectrum for HF and VHF communication.

David Lauder BSc, PhD, CEng, MIET, University of Hertfordshire. David graduated from University of Essex with a BSc Telecommunications Engineering and worked at Marconi Avionics and ITT/STC. He then worked at Hatfield Polytechnic/University of Hertfordshire where he has taught courses in
electronics, communications and EMC. He completed a part time PhD in EMC in Wireline Communications and has continued research in this area.

Keith Armstrong graduated in electrical engineering with a B.Sc (Hons.) from Imperial College London in 1972, majoring in analogue circuit design and electromagnetic field theory, and achieved Upper Second Class Honours (Cum Laude). Much of his working life until 1990 involved solving real-life interference problems in high-technology products, systems, and installations, for a variety of companies and organisations in a wide range of industries. Keith has always aimed to make products easy to design and manufacture, work properly, please their users. Keith has been a Chartered Electrical Engineer (UK) since 1978, a Group 1 European Engineer since 1988, and has written and presented a great many papers on EMC and on EMC for Functional Safety. He is a past chairman of the IEE’s Professional Group (E2) on Electromagnetic Compatibility, a member of the IEEE’s EMC and Product Safety Societies, chairs the IEE’s Working Group on ‘EMC and Functional Safety’, and is the UK expert appointed to the IEC 61000-1-2 (‘EMC and Functional Safety’) maintenance team.
The event is an open meeting, with all welcome. There is no charge for attendance.

If you plan to attend you need to register by informing: Roy Ediss

For registration you will need to provide:
Name, Company, (if applicable),

Book early to avoid disappointment.  We look forward to seeing you on the day.

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