Chapter Chatter


Ah, Paris in the Spring!

One EMCS Member, who will simply be known as "Senior EMC Consultant," tells of being called to Chrysler-Semca in Paris, France, twice in one spring season. In this particular Chrysler plant, the main-frame computer room was surrounded by 200 arc welders. On Senior EMC Consultant's first trip to Paris, he was brought in to determine why the entire computer system would go into "clocks-off" mode when one particular welder was operational. After a short investigation with an ESD gun, he discovered that on one cable (out of 650), the cable shielding was terminated to pin 99 instead of pin 100 (ground pin). The culprit cable failed the ESD test at 200 V instead of 10 kV. The Senior EMC Consultant reminisces that he "remained in Paris for three more days, at the company's request and expense. They wanted to make sure that I had truly solved the problem. Touring Paris in the springtime was wonderful!"
On his second trip to Paris that spring, the same computer system was again experiencing another mysterious "clocks-off" failure. As Senior EMC Consultant walked around the system, he found that a logic analyzer had been retrofitted into one of the cabinets. The analyzer, located outside of the cabinet, had been connected to various memory circuits of the computer by coax cables which entered the shielded cabinet. However, the cables were not grounded to the cabinet. To trouble-shoot what he suspected to be the problem, Senior EMC Consultant moved a fluorescent magnifying lamp into close proximity of the cables and switched the lamp on. The system immediately went into "clocks-off" mode. The coax cables were removed from the system and all was well. The Senior EMC Consultant muses, "the company again insisted that I remain on contract for an extra three days to ensure that my recommendations had solved the problem. I ate my way through Paris."

Central New England
A Chapter meeting was held on Wednesday, October 16th, 2002. The speaker was Dr. Lothar (Bud) Hoeft, Independent Consultant and Distinguished Lecturer of the IEEE EMC Society. His presentation discussed the topic: "Experimental and Theoretical Analysis of Electromagnetic Shielding of Enclosures." According to Dr. Hoeft, one use of conductive enclosures is to keep electromagnetic fields where they belong. The surface magnetic field attenuation (MFA) of a wide range of enclosures and panels has been measured. The speaker discussed a simple theory developed to explain and extend the results. 11 IEEE EMCS members attended the meeting. The low attendance was probably the result of a severe Northeast storm moving through the area prior to and during the meeting. Monthly committee meetings are being held to plan for the 2003 IEEE EMC Symposium to be held in Boston this summer. The Symposium Committee members are all CNEC EMCS members. Boris Shusterman and John Clarke will be Chapter Co-Chairs for 2003 and the election will be held at the next Chapter meeting (probably in March 2003).

Central Texas
2002 was an outstanding year for the Central Texas Chapter of the IEEE EMC Society. The activities included an EMC/Product Safety Vendor Expo, a tour of the new facilities at ETS-Lindgren, in Cedar Park, Texas, and two social dinners. A variety of notable speakers addressed the chapter members. The chapter wishes to thank the following for volunteering their valuable time to share their experience and insights: Dr. Michael Foegelle (ETS-Lindgren), Mark DeKirmandjian (TDK), Al Ridilla (BMI-Parkway), Dr. Lothar "Bud" Hoeft (EMC Society Distinguished Lecturer), Michelle Cook (IBM), Todd Steigerwald and Ross Carlton (Electromagnetic Design and Test, LLP), Dr. Maria Sabrina Sarto (University of Rome "La Sapienza"), Robert W. Holland (Hamilton and Terrile, LLP), and Colin Brench (Compaq/HP; EMC Society Distinguished Lecturer). Thanks go to John O'Brien and National Instruments for again allowing the chapter to call the NI facilities "home." Special thanks also go to Dianne Brown, Charles Farris, and Mark Prchlik for their hard work on the EMC/Product Safety Vendor Expo. Finally, the chapter officers wish to thank the area members for their support, and for making 2002 such a success. We look forward to working with all of you in 2003 to ensure that the chapter continues to grow and serve its members with distinction. For updated event information, please visit the chapter website at http://ewh.ieee.org/soc/emcs/chapters/centraltexas/

Maxine Martin of DLS Electronics was recognized by the Chicago Chapter in appreciation for her "years and years" of cheerful, professional service.

Chicago
Maxine Martin of DLS Electronics received an award from Chapter Chair Ray Klouda, for years and years of appreciation, at the Chapter's "First Annual Christmas Party," held at Dave & Busters restaurant. It was very well attended with over 50 people in attendance. The Christmas game was won by Brandon Krozel, and the pool game was won by John Modica. In addition, many certificates were given away for various games that were held. We all look forward to next year and the Second Annual Christmas Party. Frank Krozel, Treasurer of the Chapter, invites everyone to come to Chicago for the 5th Annual Chicago EMC MiniSymposium on Tuesday, May 20. Check out www.ewh.ieee.org/soc/emcs/chicago/ for more information about Chicago EMC Chapter activities.

Germany
At the German Chapter's last meeting, we elected a new Chapter Board of Directors. These officers will serve for a period from January 1, 2003 to December 31, 2004. The new Board consists of the following persons: Prof. Dr.-Ing. Heyno Garbe, Chairman, Universität Hannover; Dipl.-Ing. Diethard E. C. Möhr, Vice-Chairman, Siemens AG; Dr.-Ing. Frank Sabath, Treasurer, WIS ABC; Dr. Frank Gronwald, Technical Activities, Universität Magdeburg. Other At Large BoD Members include: Prof. Dr.-Ing. Dr. E.h. Jan Luiken ter Haseborg of the TU Hamburg-Harburg and Dipl.-Ing. Friedrich-Wilhelm Trautnitz of Albatross Projects GmbH.

After the Israel Chapter Workshop, Anatoly and Alex volunteered to clean the beautiful coastline of Israel.

Speakers at the Israel Chapter Workshop, from left to right: Dr. Alex Axelrod, Dr. Anatoly Tsaliovich, Elya B. Joffe, and Oren Hartal.



Israel

On September 2-3, 2002 the Israel IEEE EMC Chapter organized a two-day workshop with ILTAM, Israel's Users Association in the Electronic Industry. The Workshop, entitled "Advanced EMC Design Techniques For High Speed Electronics," took place in Hertzeliya, Israel, and featured as the initiator and leader of the Workshop, Dr. Anatoly Tsaliovich, USA, with guest speakers from Israel: Dr. Alexander Axelrod, Mr. Elya Joffe, and Mr. Oren Hartal. Each speaker is well known and recognized in Israel and abroad.

Following the conclusion of the Israel Chapter Workshop, the Axelrod, Joffe and Tsaliovich families enjoyed an evening of leisure at Alex's home, with (almost) no discussions on EMC and EMC'2003 (Istanbul) Symposium. Elya is the Symposium Chairman, Alex is the Technical Program Chair and Anatoly is the Chairman of the International Advisory Technical Council and Editorial Board (IATC/EB).

Beyond the technical content, the theme of the workshop was "The First Technical Workshop in Benefit of Terror Victims." While the technical merits of this Workshop were many, its organizers and participants demonstrated their support for the victims of terrorism. All proceeds from the workshop were directed to benefit victims of terrorism.
The technical program of the workshop addressed the EMC needs of high-speed electronics. Designers, managers, and users, as well as leading EMC experts from the United States and Israel presented a detailed analysis of selected high-speed electronics EMC problems and suggested appropriate, often innovative and original practical design techniques. The Workshop scope spanned the subjects from EMC design rationale and strategies to EMI reduction spectrum and signal management to system configuration, grounding and shielding, to PCB layout and discrete electromagnetic decoupling.
The following specific papers were presented in the course of the full two days:
"EMC Design Rationale and Strategies In High Speed Electronics" by Dr. Anatoly Tsaliovich
"Spectrum and Signal Management for EMC" by Dr. Anatoly Tsaliovich
"EMI Coupling Mechanisms and What to Do About Them" by Dr. Anatoly Tsaliovich
"A Note on Interconnection Problems and Solutions In High Speed Electronics" by Dr. Anatoly Tsaliovich
"EMI Effects Due to Unbalance in Signal and Power Ports" by Dr. Alex Axelrod
"The Principles of Path of Least Inductance in Circuit and Grounding Design" by Elya Joffe
"System Design Considerations and PCB Layout for EMI Protection" by Dr. Anatoly Tsaliovich
"Magnetic Shielding in Power Plants for Large Facilities" by Oren Hartal
"Discrete Decoupling Techniques for System and PCB EMC Design" by Dr. Anatoly Tsaliovich
"A Note on System Model of Electromagnetic Shielding" by Dr. Anatoly Tsaliovich
The Workshop was concluded with a forum of Q&A and Panel Discussions. Over 60 IEEE members and guests attended the event and overwhelmingly declared it to be a success!

The Introduction Slide presented at the Israel Chapter's recent workshop.



Dr. Lothar "Bud" Hoeft gives one of his popular presentations to a full house at the Long Island Chapter meeting in October.

Long Island
The Long Island (LI) New York chapter is pleased to report that it is back in operation. When the previous long-time Chapter Chair, Bob Berkovitz, moved out of town, the realization came that he was simultaneously the Chapter Chair, Vice Chair and Secretary. The LI IEEE EXCOM then appointed Richard Mohr and Bruce Willard as Co-Chairs and charged them with bringing the Chapter back into operation. They enlisted Jim Colotti of Telephonics Corporation and a recent addition to the EMC Society, to construct a web page for the Chapter and it is now in operation: http://www.ieee.li/emc.htm. The kick-off meeting was held on October 8, 2002 at the Holiday Inn in Plainview, LI. EMCS Distinguished Lecturer, Dr. Lothar (Bud) Hoeft, was invited and gave his presentation, "A View of Electromagnetic Life Above 100 MHz (An Experimentalist's Intuitive Approach)." Dr. Hoeft addressed the important area of parasitic circuit elements and their undesirable EMC effects. He expertly avoided complex electromagnetic equations and concentrated on measurement approaches and sanity checks. The attendance of 41 included 20 members of the EMC Society. The Long Island EMC Chapter continued with our bi-monthly meeting schedule on December 10. Telephonics Corporation hosted the December meeting at its facility in Farmingdale, NY. The meeting began with elections of Chapter officers. Bruce Willard and Richard Mohr, who had been appointed interim Co-Chairs by the EXCOM, were unanimously elected Chairman and Vice Chairman, respectively. Mr. Jim Colotti of Telephonics Corporation then treated attendees to a presentation on Printed Circuit Board design. Mr. Colotti is a highly regarded hardware design engineer who, uniquely, is also NARTE-Certified and highly qualified in EMC and TEMPEST design. The crowd of 47 attendees was divided about equally between hardware design engineers and EMC engineers and all were well rewarded by an excellent presentation. The technical content of the presentation was high and was supported by a skillfully balanced combination of simulation results, visual aids (real examples), supporting mathematics, and a lively presentation style. At the end of the meeting, a number of useful "links" were provided for additional follow-up. Sadly, a number of latecomers had to be turned away, however, Mr. Colotti has graciously placed the presentation slides on our EMC Chapter's web page at http://www. ieee.li/emc.htm. Underwriters Laboratories, in Melville, NY, will host the next meeting, scheduled for February 11, 2003. Mr. Corey Hyatt of Underwriters Laboratories will give the technical presentation, on the new European medical directive. Long Island EMC Chapter meetings are also scheduled for April and June and details will be posted on our web page as they become available.

Los Angeles Chapter Chair Ray Adams thanks Colin Brench for presenting "Modeling and Measurements: Two Similar Mindsets" at the May Chapter meeting.

Los Angeles
Many thanks to Ray Adams, Chair of the Los Angeles Chapter, for providing the following report.
It's been a while since the Los Angeles Chapter has submitted anything to the EMCS Newsletter. This certainly is not due to a lack of Chapter activity as we had five meetings in 2002. This contribution will be a "Year In Review" for the LA Chapter activities. I'd like to thank WEMS Electronics who hosts our chapter meetings, John O'Brien who arranges all the pre-meeting details (audio-visual equipment and refreshments) and Vice-Chair Kenaiya Mahendra who maintains our electronic mail list. The LA Chapter started off in January with Gus Freyer who spoke on "Reverberation Chambers and the Implications of Statistical EMC Testing." This proved to be an enlightening presentation as most of the Chapter members have heard about Reverberation Chambers, but until this meeting have had little exposure to the topic. For Gus it was a kind of homecoming as he used to be stationed at the Los Angeles Air Force Base in El Segundo many years ago. In February, Bob Reynolds from Boeing Satellite Systems presented a tutorial on "Passive Intermodulation Distortion (PIM)." Bob is one of the few communication spacecraft experts on the subject of PIM. Uncontrolled PIM on a spacecraft can render a communication satellite unusable if they are not designed out from the start. PIM is a phenomenon by which ordinary metal to metal contact, found in and around medium and high power multi-carrier RF transmitters, acts like mixers that cause the transmit carrier energy to frequency spread into the pass band of nearby receivers rendering them unusable or with seriously degraded performance. In March, we had a visit from our first EMCS Distinguished Lecturer in 2002, Bud Hoeft. Bud presented "The Experimental and Theoretical Analysis of Electromagnetic Shielding of Cables and Connectors." Bud is an excellent speaker and the combination of Bud's enthusiasm and our chapter members interest in the subject resulted in the meeting running well past the allotted time. The discussion moved to the parking lot to allow the cleaning staff at WEMS Electronics to go home! Colin Brench, another EMCS Distinguished Lecturer, visited us in May. Colin presented "Modeling and Measurements: Two Similar Mindsets." Colin's presentation was very practical and informative as he shared with the audience his years of EMC modeling and

Doug Smith visits the Los Angeles Chapter in October to present "Personal Security for Computer Users" to a curious audience.

testing expertise. He provided useful insights into EMC modeling that can guide those just starting in modeling and help fine tune the insight of the experienced EMC modelers. The Chapter took a long break from June to October as we had several speakers get cold feet when it came to air travel in the post September 11th era. Our final meeting for 2002 was in October. The subject, Computer Security, was a refreshing change of pace for the hard core EMC'ers in the group. The presentation was entitled "Knock in the Middle of the Night" which was a real eye opener in this day and age of the computer hacker. Doug Smith presented the audience with useful information on firewalls, sample computer attacks from the victim computer perspective and how you can make it harder for hackers to invade your home PC by changing some of the settings in your Internet browser. He also told us of a free firewall program that can be downloaded off the Internet. The Los Angeles Chapter is looking forward to a better year in 2003 and is already planning to top the 2002 program of events.

Dave Simons, Los Angeles Chapter Student Activities Chair, Ray Adams and speaker Robert Reynolds after the PIM Tutorial.

 

Los Angeles Chapter "Groupies" (first row left to right) Dave Simons (Student Activities Chair), Ken Loy (TRW), Richard Mahoney (Aerospace), Richard Briet (Aerospace) and Kanaiya Mahendra (Aerospace). (Second row left to right) John O'Brien (WEMS Electronics), Ray Adams (Boeing) and Robert Reynolds (Boeing).

Terri He (Boeing), Brian Kuhlman (Boeing) and John Wiggans (Consultant) enjoyed the social hour prior to the meeting of the Los Angeles EMC Chapter.
The Melbourne Chapter gets a "hands on" opportunity to better understand aircraft lightning attachment phenomenon.

Melbourne
On December 5, 2002, the Melbourne, Florida EMC Chapter hosted a technical meeting to discuss certification of commercial aircraft. Edward Kirchner and Bruce Crain, both employed by Northrop Grumman in Melbourne, Florida presented "FAA Certification for Electromagnetic Environmental Effects." Ed and Bruce have many years of experience in EMC aircraft design, and Bruce is a FAA Designated Engineering Representative for EMI, EMC, HIRF, and Lightning protection. The meeting was held at the Indian River Brewing Company in Melbourne, Florida home of the (soon to be) world famous Kelly's Cider. After everyone had their fill of pizza and samples of the house beverage, the guests were treated to the technical presentation in big screen and amplified sound, thanks to a donation from the EMCS Angel Fund that purchased some much-needed audio/visual equipment. After the presentation, aircraft lightning attachment phenomenon were demonstrated using a model airplane set atop a high voltage generator (thanks to Fred Heather of NAWCAD for providing the inspiration for this demo!). This meeting was a great way to end the Melbourne Chapter's 2002 activities, and we look forward to another successful year in 2003.


Mohawk Valley
After a summer hiatus, the Mohawk Valley Joint EMC/Reliability Chapter went into full gear sponsoring two speaking engagements, one by Dr. Lothar (Bud) Hoeft on "A View of Electromagnetic Life above 100 MHz" in October and a second by Dr. John D. Norgard on "Infrared Images of Electromagnetic Fields (Radiation/Scattering/Coupling)" in December. Many thanks to Chapter Chair Irina Kasperovich of ANDRO Computational Solutions in Rome, NY for arranging these talks. In October Dr. Hoeft, an EMC Society Distinguished Lecturer and a Consultant in electromagnetic effects out of Albuquerque, New Mexico, gave a talk on the electromagnetic impacts of high-speed digital electronics and advanced telecommunications technologies, in particular, at frequencies above 100 MHz. He points out that above 100 MHz, many of the usual simplifying assumptions that EMC engineers apply

Chapter Chair Irina Kasperovich welcomes Dr. Norgard to the Mohawk Valley.

are no longer true and engineers must adopt a new way of looking at EMC problems. Dr. Hoeft suggests an intuitive approach be adopted that allows the engineer to visualize a "circuit/system" as a collection of components whose characteristics can be estimated, or if necessary, measured. Parasitic effects, absorption, radiation losses, and wavelength effects become more significant above 100 MHz, yet these effects can be overlooked in the larger sense. As Dr. Hoeft puts it, "…life is 'absorbing' above 100 MHz," that is, most losses are proportional to some power as a function of frequency, therefore, they can become dominant effects at the higher frequencies. Another way of visualizing the circuit/system problem is to use the acoustic to electromagnetic wave analogy. Because of the differences in the propagation velocity, most things in life are acoustically small and they scatter, interact and absorb acoustic energy in a way that is analogous to how they react to electromagnetic energy. Dr. Hoeft gave a most stimulating talk on this subject.
The December presentation by Dr. Norgard, who is an IEEE Fellow (for Infrared Metrology) and a Professor of the ECE Department at the University of Colorado at Colorado Springs as well as a Visiting Professor at the US Air Force Academy in Colorado Springs, discussed the development of a new method for measuring the magnitude and phase of electromagnetic fields using thermal techniques. Incidentally, Dr. Norgard is a Member of the EMC Society Board of Directors and is the new Vice-President for Technical Services. According to Dr. Norgard, the technique allows for the direct measurement of the magnitude of the field (by creating an IR thermogram), and for the indirect measurement of the phase (by creating an IR hologram). A brief outline of the theory was presented. In generating an IR thermogram of the field, a thin, lossy IR detector screen is placed in the plane over which the field is to be measured. A sensitive IR camera is used to measure the small relative changes in temperature over the surface of the screen on a pixel-by-pixel basis. These temperature changes are due to the power absorbed from the

Dr. Norgard describes his IR thermogram for visualizing scattered EM fields.

incident field by the lossy screen material and are proportional to the intensity of the incident field at each pixel location. The screen has been calibrated at NIST, Boulder to produce a "color temperature" table vs. incident EM field intensity. Therefore, the absolute field intensity can also be measured. When the IR images are combined with holographic phase retrieval techniques, the phase of the field can also be recovered from magnitude only measurements. This technique has many advantages over conventional hard-wired probe techniques, viz. speed and accuracy (no mutual coupling), and produces a 2D visual image of the field being measured. It is also well suited for measurements in small cavities without the introduction of metallic probes that change the Q of the cavities. The technique has been used previously to measure RF and microwave fields and has been applied to many radiation, scattering, and coupling problems. Dr. Norgard presented several examples of these applications which are currently being used by the Government and industry. His talk was very well received and Chapter Chair Irina Kasperovich plans to invite Dr. Norgard back by demand, to present the second half of this topic on "creating an IR hologram" to analyze the phase properties of scattered electromagnetic waves.
Ms. Kasperovich plans for additional Distinguished Lecturer (DL) speaking engagements starting in Spring 2003. She noted, "The DL Program has become an important tool in exposing our local technical community to the importance of EMC and is an effective way of serving our local Section and Chapter members as well as for recruiting new members." More to come in the next Newsletter!

An attentive audience listens as Dr. Norgard explains his IR imaging technique.

Nanjing
On November 1, the Nanjing EMC chapter held a meeting attended by 9 IEEE members and 30 guests. Dr. Keren Li of the Communications Research Laboratory gave a presentation entitled, "Photonic Feeding Coplanar Antenna for Microwave and Millimeter Wave Applications." Dr. Li's presentation was greatly appreciated by the large audience. On November 14, Mr. Lin Jin, Senior Engineer with the Nanjing Institute of Electronic Research, spoke to the chapter regarding "Design of Planar Waveguide-Slot Array Antennas." An outstanding turnout of 12 IEEE members and 43 guests very much enjoyed Mr. Jin's presentation. "Antenna Technology for Beyond 3G Wireless Communications," was the hot topic for the December 12th meeting. Professor Wei Hong of Southeast University spoke to large group of 14 IEEE members and 47 guests who very much enjoyed his presentation. Only one day later, on December 13, Professor Tie Jun Cui indulged a group of 52 engineers with a very interesting report entitled, "Recent Progress on Computational Electromagnetics." In a final meeting for 2002, the chapter met on December 18 for a presentation by Professor Erik D. Goodman, Michigan State University, entitled, "Automated Design of Multi-Domain Dynamic Systems Using Evolutionary Algorithms." The chapter meeting and presentation was thoroughly enjoyed by 10 IEEE members and 26 guests.

Ed Nakauchi's October presentation to the Orange County Chapter was well received.
Ed Nakauchi of Laird Technologies prepares for his presentation to the Orange County Chapter in August.

Orange County
On October 29th the Orange County, California Chapter welcomed Mr. Ed Nakauchi of Laird Technologies for a insightful presentation on Shielding Technology and its future. Ed's presentation discussed where today's technology is going with its faster clock speeds and smaller sizes. Ed focused on how this technology would impact the world of shielding and he presented solutions provided by shielding companies such as the use of high frequency absorbers. He also discussed the shortcoming of shielding theory that is presently used today. We had an excellent audience of over 25 engineers to benefit from this presentation. On November 14th, the Orange County Chapter welcomed Chris Kendall, CEO and Pricipal Consultant at CKC Laboratories, for a special, three hour "Design and Test for Immunity Workshop." We had an exceptional turnout of over 45 attendees for this meeting! Mr. Kendall's presentation featured design techniques for achieving required immunity, including system grounding, I/O cable shielding and shield termination, I/O filtering, PC board layout rules, PCB filtering rules, case shielding requirements, clamping methods, RF common mode chokes, and other design methods that have proved successful. It also covered ESD theory (how ESD is generated and basic physics that describe ESD including capacitance, impedance, charge, voltage, current, and power), radiated immunity and conducted immunity. The presentation was well received and many EMI engineers stayed after the seminar to chat with Mr. Kendall. Many thanks to CKC Laboratories' Brea, California laboratory for hosting both the October and November meetings.

Attendees at the November Orange County Chapter meeting await the start of Chris Kendall's Immunity Workshop.

The Orange County Chapter November Speaker, Chris Kendall of CKC Labs, visits with local EMC icons Michael King and Ed Nakauchi, from left to right.



Derick Skouby, Chapter Chair and Dean Jurgensen, Chapter member, enjoyed the Oregon and SW Washington Chapter winter social.
Pat André demonstrates the special "EMC" test tools that he discussed at the Oregon and SW Washington Chapter meeting in November.

Oregon and Southwest Washington
On October 30th, Greg Kiemel of Northwest EMC presented the topic "EMC Authorization of Wireless Devices in the US and EU." His interesting presentation generated several questions from the audience. This timely topic was well received. On November 21st,

The Oregon and SW Washington Chapter enjoys dinner before Pat André's ". . . Drive by EMC" presentation on November 21.

Patrick André of André Consulting Inc. presented the topic "Troubleshooting EMI, Even More Drive-By EMC Engineering." His presentation utilized several special "EMC" test tools as shown in his photographs. On December 12th, the Chapter had our holiday social. This event was a combined social meeting with the Product Safety Technical Committee (PSTC), which is affiliated with the EMC Chapter. 30 revelers attended the event. All had a delightful evening of dinner, dancing and gift exchanging. We had some special guests from the EMCS international organization at the event: Janet O'Neil and Barry Wallen. Our 2003 schedule includes Dennis King of FerriShield presenting on "Ferrites and EMC" in January. In February, we are looking forward to having Distinguished Lecturer, Bruce Archambeault, do a presentation on modeling. On March 24th, the chapter will sponsor a colloquium and exhibition. This year we are honored to have Lee Hill of Silent Solutions LLC and Tom Van Doren of the University of Missouri, Rolla as our speakers. We anticipate very good attendance at this ever-popular biennial event. In April, we will have Bruce Harlacher of Fischer Custom Communications presenting on the new requirements in CISPR 22, paragraph 9.5, concerning conducted emissions on telecom ports using Impedance Stabilization Networks (ISN's). In May, we have Distinguished Lecturer CW Lam of Apple Computer scheduled for a presentation. Details of these events can be found on our chapter web site at http://www.worldaccessnet.com/~emc/.

Greg Kiemel gives an informative presentation on the approval of transmitters to the Oregon and SW Washington Chapter.
Dean Jurgensen, Jacque Benitez, Barry Wallen and Henry Benitez get into the holiday spirit at the Oregon and SW Washington winter social event.

 

At the Phoenix Chapter meeting, Distinguished Lecturer Colin Brench points out the 14 dB variation of field strength across the length of a dipole versus the 3dB of field variation across a bi-conical antenna.
Distinguished Lecturer Dr. Cheung-Wei Lam points out to Phoenix Chapter members that signal integrity (SI) is usually focused in the time domain, while EMI is typically focused in the frequency domain.

Phoenix
At the October 10th meeting, Terry Donohoe announced that he was stepping down as Chapter Chairman. The Chapter formally recognized Terry for his outstanding contributions in the past four years. After a rousing social hour at Garcia's Mexican restaurant in the Embassy Suites Tempe, Harry Gaul was unanimously elected by all members present to take Terry's place as Chairman. Harry will also continue to act as the Treasurer and Webmaster. Glen Gassaway was then elected by the membership to fill the secretary position, at least temporarily. Daryl Gerke was re-elected as vice-chairman. After our business was completed, it was time to start the presentation. Colin Brench, Principal Member of the Technical Staff at Hewlett-Packard in the Boston area, presented "Antenna Behavior and Use - (What Really Goes On During a Test?!)" Colin delivered a remarkable presentation highlighting the differences between the ways the antennas are designed, used and calibrated. The presentation included a wealth of anecdotal information, test data, and empirical results that indicated potential errors when certain antennas were used in certain ways. This issue is further confused by the international requirements that must be met when both qualifying an EMC test site and the theoretical models which still have their own inaccuracies. One of the highlights of the meeting was Colin's mentioning that some businesses strive for 6-Sigma accuracies while the accuracy actually established through EMC measurements was calculated by him at one time to be approximately 1-Sigma. This caused a few laughs, as this simple mention of 6-Sigma caused many of the meeting participants from the larger companies to generate loud noises. After the presentation, Harry presented Colin with the traditional jar of Arizona salsa for a job well done. Thanks from all of us, Colin! At the November 21st meeting, Dr. Cheung-Wei Lam of Apple Computer presented "Signal Integrity Design versus Radiated Emission Control," where his goal was to highlight the relationship between the two subjects. His presentation was organized into four parts: design objectives, key concepts, design considerations and a summary. Dr. Lam pointed out that signal integrity (SI) was usually focused in the time domain, while EMI was typically focused in the frequency domain. He mentioned that common mode emissions are the biggest concern for EMI and these can be estimated using a dipole antenna model. Oftentimes, it is the ground structure that is the biggest item that can radiate, and it is imperative that radiators (such as the CPU and heat sink assembly) must be kept away from the center of the PWB and away from the I/O. Dr. Lam then fooled everyone with a question asking whether a microstrip or co-planer strip transmission line is the larger radiator; the answer was, "it depends!" In the differential mode, the coplanar strip radiates less, while the microstrip radiates less common mode. He told us that ground drop is a major source of radiation and a design practice would be to focus on reducing di/dt and ground inductance. Dr. Lam then spoke of situations where good SI design practice helps EMI. These situations included: good ground planes; source vs. end resistive termination of traces; paying careful attention of continuous impedance matching of traces; proper handling of stubs, vias and return vias; crosstalk (especially from clocks to I/O); traces crossing slots; connectors and IC pinouts; board stack-up and placement; the use of differential signaling; and proper power decoupling. Whew! He also mentioned areas where EMI design practices do not have a significant effect on EMI, including splitting clock frequencies, shielding, some forms of grounding, and the minimization of fringing fields by not running critical traces near board edges. Dr Lam then covered areas where good EMI design can actually hurt SI, including filtering of I/O's and clocks, spread spectrum clocking, burying clock layers and skin and dielectric losses. He also mentioned areas where good SI design can hurt EMI, including ground isolation techniques, and timing driven designs (e.g. traces made longer than they have to be). Dr. Lam then summarized this wealth of information, and received several compliments from the crowd in making such a complex subject more easily understood! Information on upcoming meetings is available at the Chapter's web site, http://www.ewh.ieee.org/r6/phoenix/phoenixemc/.

Romania
Chapter Chatter has learned that a new EMC chapter was formed last month. In a letter dated November 19, 2002, the IEEE informed Andrei Marinescu, Interim Chapter Chair, that the IEEE by-laws had been met and that a new EMC chapter had been formed under the Romanian section of the IEEE. Congratulations to the new Chapter and we hope to hear from them soon!

Greg Kiemel of Northwest EMC delivered a great presentation to a full house at the November Seattle Chapter meeting.
Seattle Chapter members were treated to a catered dinner from Tony Roma's courtesy of Northwest EMC prior to the November meeting.

A tour was conducted of the EMC laboratory at Netro Corporation, site of the November Seattle Chapter meeting.

Seattle
The October 23rd Chapter meeting was held at the Meydenbauer Center in Bellevue, in conjunction with the Northcon conference that took place there from October 22-24. Prior to the meeting, the IEEE Seattle Section provided complimentary gourmet pizza, draft beer and wine at an informal reception in the exhibits area. Chapter members were able to mingle with the exhibitors and stroll through the exhibits while enjoying a tasty dinner. The Chapter meeting speaker was Colin Brench of Hewlett Packard in Marlborough, Massachusetts. Colin came to town to participate as a speaker at Northcon. He gamely stayed longer and spoke to the Chapter as well on "Antenna Behavior and Use - (What Really Goes on During a Test?!)". The topic inspired the Chapter members to stay and ask several questions at the end. It was a lively meeting with much interaction between the speaker and the attendees. There was even an antenna on display to complement the material presented: a demo EMCO biconical antenna and tripod from the Chapter Chair's office which was gamely brought to the meeting. (Many thanks to Colin for helping transport these to the meeting room and for setting them up in record time!) Mr. Brench really had a busy week at Northcon! 27 people attended his full day course on "EMC Essentials" and 17 attended his half-day course on "EMC Computer Modeling." Incidentally, Chapter officers Pat André and Kitty Tam attended these courses, respectively. Despite the depressed economy, there was a good turn out at Northcon last year. For its November meeting, Chapter Vice-Chair Pat André reports that the Seattle Chapter was delighted to feature Greg Kiemel of Northwest EMC. Mr. Kiemel spoke on the topic "Agency Certifications Explained." He gave a lively discussion on the present state of the submittal process for the FCC, Europe, and other areas around the world. Concerning the FCC, Greg showed the step-by-step process for certification, the changes in the process over the years, and the types of equipment requiring certification. He discussed the roll of a TCB (Telecommunication Certification Bodies) in the U.S. and in Europe, and the advantages of them. He also discussed MRA's (Mutual Recognition Agreements), TCB activities and prohibitions. Greg then discussed the European R&TTE (Radio and Telecommunications Directive) philosophy and activities. This branched into a discussion on Notified Bodies and Conformity Assessment Bodies (CAB's). This included when to use a Notified Body, who is one, and what information do they need from you. He ended with a number of web links where further information can be found. The presentation went 90 minutes, and was continuously lively, interesting and informative. Questions were fielded and answered throughout the evening. Some of the best conversations were between Greg and the FCC representative in the audience. Many thanks to Northwest EMC for hosting the dinner catered by Tony Roma's prior to the November Chapter meeting.

EMC Society Distinguished Lecturer Colin Brench spoke at the October Seattle Chapter meeting. He was obviously pleased with how well his presentation was received!
Seattle EMC Chapter Chair Janet O'Neil visits with speaker Colin Brench and chapter members following the October meeting.

Singapore
The Singapore EMC Chapter held a meeting on December 12th at the Institute of High Performance Computing (IHPC). Dr Bruce Archambeault of IBM (Research Triangle Park, North Carolina) spoke at the early afternoon meeting on the topic of "EMI/EMC Modeling and Simulation for Real World Applications." The meeting was well attended by approximately 12 members and 60 non-members. Bruce briefed the audience about the rationale and methods behind the application of Computational Electromagnetics. He spoke on what these methods could and could not achieve. The Singapore Chapter would like to thank the Institute of High Performance Computing for their generosity in hosting the meeting. We have made plans to host the next meeting in the latter part of January 2003. Contact Tim Foo (email: fwj@np.edu.sg) for the latest schedule on the upcoming chapter meetings of the Singapore chapter.

Those in attendance at the December Singapore Chapter meeting included (from left) Li Er Ping EMC Divisional Manager, CEM & Electronics IHPC Singapore (Chapter Deputy Chair), Tim Foo Ngee Ann Polytechnic (Chapter secretary), speaker Bruce Archambeault, and Ng Buck Chew (Chapter committee member).
Participants listening eagerly to Bruce as he spoke about CEM at the Singapore Chapter meeting.

 

A raffle for a free probe, courtesy of Credence Technologies, was held during the reception following EMC Brasil 2002. Antonio Caramico, Jr. of Rohde & Schwarz won the prize and received congratulations from Toni Gurga of Credence and Carlos Sartori from the University of São Paulo (from left).
It's an all-star line up of speakers for EMC Brasil 2002, including (from left) Jose Perini, Don Heirman, Ghery Pettit, Dan Hoolihan, Elya Joffe, and Todd Hubing.


Mônica de Amorim Schutt from the University of São Paulo ably handled the registration rush prior to the start of EMC Brasil 2002.

South Brazil
"It's Caipirinha time!" so exclaimed the attendees following "EMC Brasil 2002." This Colloquium and Exhibition was held on Friday, November 22 in São Paulo, Brazil at The Renaissance Hotel. Over 75 people attended the full day of technical presentations. At the end of the day, a reception was held with the speakers and exhibitors who were on hand to showcase the latest and greatest in EMC products and services. Caipirinhas, the national drink of Brazil, were following freely from the bar during the reception. And why not? All agreed the event was very successful and there was reason to celebrate! Benjamim da Silva Medeiros C. Galvao from the Instituto Nacional de Pesquisas Espaciais (INPE - The Brazil Space Agency) commented: "Not only was it a great day to learn more about EMC from knowledgeable experts in the industry, but the event also provided the opportunity to network with one's colleagues and informally meet with the exhibitors." This event was sponsored by the EMC Society South Brazil Chapter and was organized by Janet O'Neil of ETS-Lindgren and Professor Carlos Sartori of the University of São Paulo. Professor Sartori was ably assisted by members of his University as well. The colloquium speakers included members of the IEEE EMC Society Board of Directors: Don Heirman of Don HEIRMAN Consultants on "Global EMC Emission Standards," Ghery Pettit of Intel on the "Worldwide Approval Process" (especially as related to ITE), Todd Hubing of the University of Missouri-Rolla on "Practical Design Techniques for Printed Circuit Boards," Dan Hoolihan of Hoolihan EMC Consulting on "EMC Test Methodology and Site Considerations," Jose Perini of Syracuse University, New York providing an "Overview of Numerical Methods," and Elya Joffe of KTL Project Engineering on "EMC Considerations in On-Board System Integration." It was a great line-up of internationally known experts in the EMC community.

The day prior to EMC Brasil 2002, participating exhibitors and members of the EMC Society Board of Directors were invited to tour INPE. Benjamim da Silva Medeiros C. Galvao of INPE (far left with raised hand) is shown conducting this tour.
Tabletop exhibitors at EMC Brasil 2002 included Chomerics. Their display was manned by (from left) Steve Mullenix, Maria Cristina Gomes and Philippe Foister.

 

Southeastern Michigan Chapter members (from left) Chuck Blahunka of Hitachi, Jacob Alkalay of Ford Motor Company, Poul Andersen of DaimlerChrysler (rear) and Steve Laya of Elite Electronic Engineering enjoyed the networking following the November meeting.
Cassius Clay Cardoso da Silva and Professor J. R. Cardoso, head of the Lmag/PEA University of São Paulo "Applied Electromagnetics Laboratory," join fellow Brazilians Carlos Sartori and Jose Perini (left to right) following the EMC Brasil 2002 event.



Southeastern Michigan
On November 6, 2002, the Southeastern Michigan IEEE EMC Society Chapter meeting was held at X2Y Attenuators' new facility in Farmington Hills, Michigan. James Muccioli served as the meeting host and Scott Lytle was the presiding Chapter officer. The IEEE meeting was preceded by the SAE EMI Standards committee meeting, so several SAE members stayed for the IEEE meeting. In all, 28 people attended the presentations by Terry North of DaimlerChrysler and James Muccioli of X2Y Attenuators. Terry presented "DaimlerChrysler EMC Performance Requirements Changes Overview" which covered the many changes to the new DaimlerChrysler EMC testing specifications. This was a condensed version of the six-hour presentation at DaimlerChrysler on November 11th. After Terry's presentation, we enjoyed pizza and refreshments provided by Janet O'Neil from ETS-Lindgren. James Muccioli concluded the evening by presenting "High Frequency Motor Measurements in a GTEM" in the testing lab at X2Y. Jim used his "Hummingbird" GTEM cell where he demonstrated various filters that help reduce emissions from DC motor brushes. More information about the Chapter may be found on the Southeastern Michigan IEEE EMC Society website at http://www.emcsociety.org.

Southeastern Michigan Chapter Chair Scott Lytle of Yazaki North America is shown with the speakers at the November meeting, including Terry North of DaimlerChrysler and Jim Muccioli of X2Y Attenuators (left to right).

Toronto
The Toronto Chapter held a meeting on November 15th, 2002 at the St. George Campus of the University of Toronto. The speaker for the meeting was IEEE AP Society Distinguished Lecturer, Dr. Zoltan Cendes, Founder and Chairman of Ansoft Corporation. The title of his presentation was "High-Level Design Using Coupled Electromagnetic, Circuit and System Simulation" and was enjoyed by all in attendance. EMC

 


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