Chapter Chatter


When I started writing the Chapter Chatter column a couple of years ago, I approached a number of EMC professionals, asking them to share humorous or interesting EMC stories. Without exception, those whom I queried responded by asking, "have you talked to Steve Jensen? He's the man with the great EMC stories." And so, Steve has been the source for several of the humorous stories I have shared in this column. The following is yet another interesting Steve Jensen (Steve Jensen Consultants, Inc.) tale.
In October 2001, Steve took a trip to Maui to satisfy an itch to combine his passion for kite flying with his love of ham radio. Steve's long time friend, Doug Dragon (KH6XM), is a resident of Kula, Maui and they both have had an interest in flying kites and operating ham radios since the early 50's. (They were both three when they started!)
Steve's idea was to attempt to operate QRP (low power) from a location at the north end of Maui (cow country) where the trade wind is steady and yields a kite flying direction that is generally west and offshore. The kite string would support a long wire antenna during flight. They selected a 360 foot piece of #26 AWG magnet wire to be supported by the kite string and tied to it at a point about 500 feet below the kite. Once airborne, the wire was attached to the kite string. The kite was then let out another 400 feet to pull the wire up and out over the ocean. The kite string was secured to the rear view mirror of the rented car and the kite flew smoothly in the steady trade winds for nearly two hours.
All bands between 160 - 10 Meters were attempted from 2300 hours UTC Oct 14 and 0130 hours on Oct 15, 2001. They worked a total of three stations, W7WHO on 17 M cw, K7HU on 17 M cw, and KQ0A on 20 cw. The best report they received was from Dennis (W7WHO) with whom they had a 15-minute QSO. He gave them a 5-3-9 report. The other attempted stations heard them, but apparently lost them shortly thereafter. By this time, both ham-kite operators were sunburned and a little discouraged. Operation on 160-40 M produced no contacts although the antenna tuned well on all bands except 160 M. Steve thinks there may have been a problem with the antenna tuner on 160.
Steve and Doug used a "QRP+" Transceiver (Index Laboratories, Gig Harbor, WA). The counterpoise for the kite wire was another 120 foot wire laid on the ground. The antenna tuner was the MFJ-971 operated in the wire mode. The power supply was a 4.5 ampere hour, 12 V gel-cell. The power output was 5 watts.
Although the results were mixed, the experience was memorable. Doug and Steve made a good team effort with their experiment and they may try this again with a different antenna design! Steve Jensen may be contacted by E-mail at S_Jensen@compuserve.com.

 

Austria EMC Chapter members and speakers shown left to right: Gerfer (Würth), Lamedschwandner (Seibersdorf), Deutschmann (Austria Microsystems), Winkler (TU-Graz), Suschnig (C&P), and Seier (TÜV Austria).
The lunch break and vendor exhibition at the EMC Meeting 2003 in Austria.
Over 130 people participated in the one-day EMC Meeting 2003 organized by the Austria EMC Chapter.

Austria
On 26th February 2003, the IEEE EMC Chapter in Austria, the Institute for Electronics (TU-Graz) and the Seibersdorf EMC Test Laboratory organised the "EMC Meeting 2003" colloquium. The well-attended, one-day event was held at the University of Technology in Graz. The following topics where presented and discussed:

  • EMC: CE Marking and other Marks (Austrian Electrotechnical Association)
  • Printed Circuit Board Design and Layout (Austriamicrosystems, TU-Graz)
  • EMC & Inductive Solutions: Ferrites and Simulation (Würth Elektronik)
  • EMC and Project Planning/e-Marking (C&P Suschnig)
  • The Radio Equipment and Telecommunications Terminal Equipment Directive (TÜV Austria)
  • Mobile Communications Safety, SAR Evaluation in EU and USA (Seibersdorf Research Center)
  • A small vendor exhibition was available for attendees during the lunch break and after the technical presentations.

Central New England
The CNE chapter held one meeting, on March 5, 2003, since the previous Winter 2003 EMC Newsletter issue. The meeting host was Co-Chair Boris Shusterman of EMC Corporation in Hopkinton, Massachusetts. The speaker was Istvan Novak, Senior Staff Engineer, Sun Microsystems Inc., Burlington, Massachusetts. His presentation described "Frequency Domain Power Distribution Measurements." In today's advanced digital systems, the power-distribution networks often have to deliver hundreds of watts at low voltages, and the required low impedance of the power distribution network must be maintained over a wide frequency band. Traditional high-frequency measuring instrumentation has been tailored to handle impedances close to 50 ohms. The very low impedance values in these networks create measurement and calibration challenges. The presentation explained the benefits of the frequency-domain method and impedance measurements with two port Vector Network Analyzer (VNA) setups. 13 IEEE members and 3 guests attended the meeting. As a note, out of state visitors are welcome at our meetings that are usually held in the Corporate Auditorium Training Center Building of EMC Corporation. We do not have any more meetings planned prior to the Boston 2003 EMC Symposium. Most of the Symposium steering committee members are CNEC EMC Chapter members.


Chicago
Frank Krozel reports that the Chicago Chapter's last meeting was in March 2003. They were lucky to have Bud Hoeft as a speaker. Bud is a former Distinguished Lecturer of the EMC Society. Bud's presentation, "Life Above 100 MHz" was well received by the IEEE EMC Chapter. His intuitive approach to EMC explained why things are sometimes not as they seem at high frequencies, i.e. parasitic impedances. In the end, he helped the chapter members to see that although things may seem strange above 100 MHz, they are quantifiable and predictable. 25 members and guests were in attendance.


France
André Berthon reports that the French Chapter held a board meeting on February 25th. The chapter welcomes as a new board member François de Daran from Valeo. A program of meetings was established for 2003, starting with a meeting which will focus on absorbing materials and near-field cartography, to be held by mid-April.


Dr. Hoeft (consultant, Albuquerque, and a prior Distinguished Lecturer of the IEEE EMC Society, with beard) held a workshop for scientists of industry and academia in Hamburg, hosted by Professor ter Haseborg, TUHH.
Dr. Carl Baum gave lectures to students and discussed his results with the research staff at the University of Hannover and at the University of Magdeburg.

The 3rd workshop, "Electromagnetic Effects," at the German Armed Forces Institute for Protection Technology (WIS) in Munster. International experts participated in this workshop organized by Dr. Frank Sabath (right).

Germany
The German Chapter held its annual general meeting chaired by Professor Heyno Garbe. He reported that the German Chapter was quite busy in 2002. 20 activities took place including technical presentations, workshops, and working group meetings. The topics of the working groups ranged from numerical modeling and high power EM effects to biological effects. Dr. Frank Gronwald and Markus Heidemann received Certificates of Acknowledgement from the EMC Society for their outstanding service to the German Chapter. The German Chapter re-elected Heyno Garbe (University of Hannover) as Chairman for 2003/2004. Each year at the University of Technology Hamburg-Harburg (TUHH), special EMC lectures and workshops take place. Professor ter Haseborg, head of the Department of Measurement Engineering and EMC, organizes the lectures. This year's EMC related workshop was presented by the German EMC Chapter. Dr. L.O. Hoeft (consultant EME, Albuquerque), Distinguished Lecturer of the IEEE EMC Society, gave an exciting presentation entitled, "Experimental and Theoretical Analysis of Electromagnetic Shielding of Cables and Connectors." After the presentation, a group of experts consisting of Dr. Hoeft, members of TUHH, and industry discussed problems concerning cable shielding as well as special EMC measurement techniques for the detection of cable parameters. Christoph Weber presented a new measurement set-up for the detection of in-homogeneities in braided cable shields. Thomas Weber presented a development in "pico TEM" technology, addressing problems of suppression techniques of conducted UWB pulses. More than 40 experts from research institutes and industry met for the third workshop "Electromagnetic Effects" at the German Armed Forces Institute for Protection Technology (WIS) in Munster. The IEEE German EMC Chapter supported this workshop. Professor Dr. Bernd Staginnus, head of the department, was excited about the great turnout and positive response from the attendees. There were participants from more than 20 international institutions and companies. As expressed by the organizer of the workshop, Dr. Frank Sabath, in the present age industrial countries are highly dependent on modern information technology. All systems used for this purpose (computers, mobiles, flight control, etc.) are based upon electronic components. Interference to these components by in-coupling electromagnetic fields can lead to system breakdowns resulting in financial losses and/or danger to humans. Coupling mechanisms, sensitivity of electronic components, and protective measures against these threats were the major topics of this year's workshop. In addition to the technical presentations, participants used the time to exchange results of new theoretical and experimental examinations and to discuss in detail questions that were raised. Due to the overwhelming positive response to the workshop, a fourth workshop is planed for summer 2004 at WIS Munster. At the University of Hannover, well-known experts Dr. Carl Baum of AFRL, Kirtland, and Dr. D.V. Giri of ProTech, Alamo, gave a presentation on "Electromagnetic Sources and Threats to Civilian Systems." A large audience of students and research staff were on hand. An exciting discussion of new research results followed. In the evening, the students enjoyed an informal dinner with the two expert researchers, talking about technical issues as well as studying and employment in the USA. Professor Heyno Garbe and Professor Michael Koch organized this event for the Students Activity Program of the German EMC Section in co-operation with the local Student Branch. Dr. Baum also visited the Otto-von-Guericke-University Magdeburg. Two afternoons were reserved for presentations where he explained his latest findings on refining Impulse Radiating Antennas and constructing efficient Narrow and Medium Band High Power Radiators. The local EMC groups of Professor Jurgen Nitsch and Professor Gunter Wollenberg hosted these activities. Each day, the presentations led to extended discussions on various EMC topics. During Dr. Baum's visit, we also organized an exciting EUROEM 2004 conference on EMC, which will take place from July 12th to 16th 2004 in Magdeburg.


Korea
Professor Dong Il Kim (Korea Maritime University), Chairman of the Korea EMC Chapter, reports that the Korea Chapter supported the "2003 Technical Workshop on RF Circuit," which was hosted by the Korea Electromagnetic Engineering Society (KEES) at the Seoul Education Center on February 6 and 7, 2003. The papers presented at the workshop covered the various aspects of the RF circuit, including fundamental RF theory, design and modeling of the high frequency active/passive element, such as LNA, MIXER, VCO, etc. Also, the Korea Chapter plans to hold a "Workshop on Antenna Technology" at the Seoul Education Center on April 25, 2003. This event will also be coordinated by the Korea Electromagnetic Engineering Society (KEES).


Lee Hill addresses the crowd at EMC Fest 2003 sponsored by the Milwaukee EMC Chapter.
These colorful posters are just waiting to take the stage for the Milwaukee EMC Chapter's EMC Fest 2003.

Lee Hill brought along lots of "toys" as part of the demonstrations conducted during his presentation. Over 70 people registered to hear Lee's presentation in Milwaukee.

Ping Lee of Rockwell Automation (right) dropped by the exhibits area during the Milwaukee EMC event to demonstrate a new product. Bill Adams of Schaffner was happy to oblige!

Speaker Lee Hill of Silent Solutions joins the dynamic trio of Jim Blaha and Teresa White of LS Compliance and Bruce Fiorani of GE Medical Systems (from left). This trio of Milwaukee EMC Chapter members organized their second annual one-day tutorial and exhibition for the chapter.

Milwaukee
A surprise 6" snowfall couldn't stop Lee Hill or 72 attendees and 24 exhibitors from attending EMC Fest 2003 in Milwaukee.
This year's April 8th tutorial focused on "Applied Electromagnetic Compatibility for PC Board and System Design." Mr. Lee Hill of Silent Solutions, LLC kept the audience involved by his unique style of "teaching through example." After the introduction of a key concept or topic, Lee followed with an everyday, hands-on example that reinforced the lecture material. This style of presentation led to this comment from one of the EMC Fest survey forms: "Lee Hill is excellent." Jim Blaha, Milwaukee EMC Chapter Chair, also acted as the Technical Program Chair. Jim has set a goal for the Milwaukee EMC Chapter to bring "value" to having an IEEE membership. Focusing on educational programs that are local and affordable brings an "Educational Value" to all IEEE members and non-members. One outcome of this goal may be summarized by another comment from an EMC Fest survey: "One the best I have attended." EMC Fest 2004 is already under development. The goal of bringing value to IEEE membership and educational value to all involved with EMC will remain the chapter's objective.

 

Mohawk Valley EMC/Reliability Chapter Chair Irina Kasperovich welcomes guest speaker Dr. Alan Lindsey.
Dr. Alan Lindsey Conducts a round table discussion of his Transmission Hypercube Concept for Efficient Spectrum Utilization.

 

Mohawk Valley

The Mohawk Valley Joint EMC/Reliability Chapter hosted a meeting on 20 March 2003. The focus of the meeting was on the topic of signal waveform diversity and its impact on EMC and spectrum management. Guest speaker Dr. Alan R. Lindsey, P.E. of the Air Force Research Laboratory/IFGC, Rome Research Site gave a super presentation titled, "Multiobjective Joint Optimization of the Radio Frequency Transmission Space", which addressed the issue of dimensional inefficiency in utilization of the RF transmission space. In his words, "We spend a lot of time thinking about bandwidth efficiency (i.e., maximizing the bits/sec/Hz), but an approach to optimally integrated full signal space dimensionality will be required to support the orders of magnitude increases necessary to sustain even the next 5 to 10 years of demand explosion in wireless devices and applications." The current track of thought on what constitutes signal transmission space is primarily focused on the frequency domain.
Dr. Lindsey's view is that the "spectrum crisis" is, in fact, no crisis at all, but this is entirely due to the fact that there is no identifiable path toward optimal utilization of the entire transmission space. He envisions a scheme in which there are at least four, possibly five or more dimensions in the RF resource (transmission) space available. For instance, there is time and geographic space and code (modulation). Polarization can be considered yet another possible dimension. According to Dr. Lindsey, while there is a bevy of technology that capitalizes on these individually, there is virtually nothing that integrates these dimensions and optimally allocates a range in the N-tuple for maximal throughput across the entire user base. Adaptivity, agility, mobility, flexibility, free "market" - These are the enabling words for future wireless expansion, not to mention the solution to the specific problem of military radio interoperability and software radios in general. From this perspective it is desired to formalize the concept, perform modeling and simulation, and demonstrate a feasible and practical algorithm jointly optimizing the utilization of RF resources with respect to multiple objectives to include (but not limited to) battery consumption, required output power, antenna efficiency, throughput, source-to-sink latency, bandwidth efficiency, spatial localization, etc. Dr. Lindsey's vision is that of a brokered or centrally managed agent which accepts requests for transmission space hypercubes from systems desiring to transmit electromagnetic energy, and outputs a simple pair of coordinates in N-space (N being the number of dimensions in the transmission "space") that bound a hypercube which the transmitter is authorized to occupy. Once the transmission is complete (time range fulfilled) the transmission ends and another user is given coordinates for the next transmission. The agent optimally "fills" the space with hypercubes to minimize unused RF resources while simultaneously optimizing the physical constraints of the participating systems, according to user-defined priorities.

Dr. Lindsey is currently responsible for basic research in interference mitigation for spread spectrum communication systems, computationally feasible trellis-based channel coding in high dimensional signal spaces, wavelet packet modulation, and efficient transform algorithms. We anticipate his ongoing contributions in these areas will be of interest to the EMC Society's TC-6 Committee on Spectrum Management.
On another note, Chair Irina Kasperovich was recently recognized by the Mohawk Valley Engineers Executive Council (MVEEC) for her efforts to rejuvenate the Joint EMC/Reliability Chapter within the IEEE Mohawk Valley Section, and making use of the Distinguished Lecturer Program and Angel funding opportunities for the benefit of the local technical community. The award was conferred at the 53rd Annual Engineer's Week Awards Banquet sponsored by the MVEEC. The MVEEC is a professional organization whose members represent various other professional/technical societies and institutes such as the IEEE.

 

Dr. Keith Harding, EMC Society Distinguished Lecturer, of Lexmark Corporation, was the speaker at the January meeting of the Orange County EMC Chapter. He drew attendees from as far away as San Diego (90 minutes south of the meeting location in Brea)!
W. Michael King, consultant, and Ed Nakauchi, Laird Technologies, of the Orange County EMC Chapter. They attended the January Chapter meeting held at CKC Labs in Brea, California.
Orange County EMC Chapter members Derek and Steve McNally of DJM Electronics (left and right) flank guest Janet O'Neil of ETS-Lindgren during dinner at the January chapter meeting.
The Orange County EMC Chapter regularly starts its meeting with an informal buffet dinner that is free for all attendees.

Orange County
On January 16, the Orange County EMC Chapter welcomed Dr. Keith B. Hardin of Lexmark Corporation. Dr. Hardin, an EMC Society Distinguished Lecturer, provided a presentation on "Two Layer PCB EMC Design Techniques" that was very well received by the audience of over 30 local engineers. The presentation included information on Circuit Design Considerations, Effect of Frequency and Duty Cycle, History of Controlling the Source Spectrum, Design for Multiple Frequencies, etc. Dr. Hardin showed how many products can use a two layer PCB instead of a four or more layer design. The presention was very informative and the audience stayed more than 40 minutes after the conclusion to ask questions. The presentaion by Dr. Hardin was a great start for the Orange County Chaper for the year 2003. Incidentally, some guests present at the meeting had attended the presentation given by Dr. Hardin to the San Diego EMC Chapter the night before. They enjoyed his presentation so much that they made a three-hour round trip drive from San Diego to Orange County so they could hear him speak two nights in a row! The Orange County Chapter is sponsoring a one-day tutorial on June 12, 2003. The tutorial, called "EMC Fest '03," will feature speakers W. Michael King and Douglas C. Smith. So, mark your calendars. You don't want to miss this one! For more information, please contact the Chapter Vice Chair, Randy Flinders, at (714) 513-8012, or at rflinders@ieee.org.

Dennis King and Derick Skouby at the Oregon and SW Washington meeting on January 29.
Dan Hoolihan, Bruce Archambeault, Derick Skouby and Henry Benitez (from left to right) attended the Oregon and SW Washington Chapter meeting on February 26.

Speakers Lee Hill and Tom Van Doren at dinner following the EMC Northwest Colloquium on March 24 organized by the Oregon and SW Washington Chapter.

Lee Hill and Don Zalezky are shown during a break at the EMC Northwest Colloquium on March 24.

Tom Van Doren gave a lively presentation at the EMC Northwest Colloquium on March 24.

Oregon and SW Washington
David Britton, the Vice Chair of the Oregon and SW Washington chapter, reports that they held a meeting on January 29th at the University of Portland. Dennis King from FerriShield gave a presentation on "The Future of Ferrite." The dinner and meeting were well attended. On February 26th, Distinguished Lecturer and EMCS Board Member Bruce Archambeault presented "The Ground Myth" at the chapter meeting. Attendance exceeded capacity at this event. EMCS Board Members Dan Hoolihan and Henry Benitez were also in attendance. The chapter hosted the one day EMC Northwest Colloquium on March 24th. Dr. Tom Van Doren from the University of Missouri - Rolla and Lee Hill of Silent Solutions LLC were present as speakers. The event was very successful with nearly 100 in attendance. 18 vendors helped make this event a smashing success! The chapter has scheduled Bruce Harlacher of Fischer Custom Communications as the April 30th speaker and he will present "CISPR 22: Radiated and Conducted Emissions Testing for Information Technology Equipment." Additionally, Bruce will provide an update on "What's Happening with the 4th Edition of CISPR 22." On May 21st, the chapter has scheduled Cheung-Wei Lam of Apple Computer as the speaker and he will present "Signal Integrity Design versus Radiated Emission Control." Details of the Oregon and SW Washington Chapter activities can be found on the website: http://www.worldaccessnet.com/~emc/


Phoenix Chapter Chair Harry Gaul presents speaker Dr. Stringfellow with a jar of Gunslinger Hot Salsa in appreciation of his talk on lightning electromagnetic field effects on buildings.

Phoenix
Glen Gassaway reports that the February 27th meeting was well attended; The Embassy Suites Tempe/Garcia's Mexican Restaurant meeting room was nearly at capacity. It was great to see such attendance! Dr. Mike Stringfellow of PowerCET presented his latest measurements of lightning electric and magnetic fields and ground grid currents inside buildings of different construction, including a shielded computer room as well as a brick building. He also discussed possible shielding techniques to minimize these fields or their effects. It is estimated that lightning damage in the US exceeds $1 billion per year, where at least half of these losses are due to indirect effects. For computers, power supply damage is unlikely because of the abundance of transient suppressors in computer power supplies. Damage is far more likely to communications ports, especially RS-232 serial ports. Lightning striking the ground up to a few hundred meters from a facility will create strong electric and magnetic fields. These fields may penetrate the structure directly or may induce currents on the building itself that in turn produces fields inside it. The fields inside the building can induce currents on communication and data lines, which may be large enough to cause damage or disruption to systems. The currents induced on the building also flow into the ground electrodes of the structure unequally, resulting in transient equalization currents in the ground grid. Dr. Stringfellow's measurements demonstrated that the reduction of a lightning-induced magnetic field in the interior a brick building is only about 2% lower than the external intensity! Lightning shielded rooms, although better, were still not perfect. About 30% of the external H-Field intensity was observed internally. Hardening principles may include the application of a reasonable Faraday cage in the room design, surge suppression, shielding, and perhaps an upgrade of the communications media away from RS-232. Dr. Stringfellow's presentation slides as well as information on upcoming meetings is available at the chapter's web site, http://www.ewh.ieee.org/r6/phoenix/phoenixemc/.


Attendees at the Santa Clara Valley EMC Chapter Meeting in December 2002.
Santa Clara Valley Chapter Chair Tom Cokenias (right) gives the helm over to incoming chair Chuck Troia (left).

Santa Clara Valley
Darryl Ray reports 37 members attended the October 2002 meeting held at a new venue: Applied Materials Corporation in Santa Clara. After the customary dinner and social, a report from the 2004 Symposium Committee Chair was given. The balance of the meeting was an open forum or "Town Hall Meeting" intended to solicit input from the membership. The open forum promoted interaction and discussion about useful topics for technical sessions to be held during the 2002-2003 season. Jeff Evans (former Chapter Chair) was presented with a small gift and some words of thanks by Darryl Ray. Jeff has taken a new position at Hewlett Packard in Roseville, CA that deals with power supply design. Now Jeff can create lots of interference that he spent many years fixing! In November, 67 people attended the meeting to hear Stu Kron of Sunol Sciences give a presentation on EMC antennas. Stu provided us with a glimpse into the background, design and construction of the EMC antennas many of us presently use. Stu's talk was very well received, and we've asked him to present to us again at a later date. In December, the chapter held its annual joint meeting with the Santa Clara IEEE Safety Society. The chapter provided food and drink to celebrate the upcoming holidays. The chapter had four candidates to run for the position of secretary. Ton Winegar was voted in for new secretary starting January 2003. Dr. M. Meyyappan, the IEEE Distinguished Lecturer for the IEEE Nanotechnology Council, gave a presentation. He is the Director of the Center for Nanotechnology at NASA Ames Research Center in Moffett Field, California. His talk presented an overview of novel nanoelectronics concepts based on carbon nanotubes (CNTs) and molecular electronics, nanosensors and detectors, nanoelectromechanical systems (NEMS), nanoscale materials and fabrication techniques. His presentation was very stimulating and based on a subject new to most of the 128 attendees. The Q&A session lasted for over 30 minutes, and the evening was a very satisfactory close for the 2002 season. As of January 1, the new chapter officers are: Chair: Chuck Troia, Vice Chair: Len Goldschmidt, Treasurer: Bertram K.C. Chan and Secretary: Tom Winegar. In January, Robert Dahlgren, president of Silicon Valley Photonics Ltd, discussed emissions from optical fiber cable connectors. He addressed the conventional wisdom that that optical fiber is dielectric, and thus does not radiate RF emissions. In reality however, these devices have some amounts of conductive material (for example a ferrule, spring, and crimp ring) and thus have an affect on radiated emissions. As data rates have increased beyond 1 gigabit/second (Gbps) the emissions challenges are increasing. 54 people attended. The February 11 meeting featured Lee Ritchey, owner of Speeding Edge, a consulting firm. Mr. Ritchey spoke on the topic of Vcc and Ground Bounce in planes and IC packages and how it may be the cause of radiated and conducted emission problems from the enclosure and cables. 76 people attended the meeting. In March 54 people attended a presentation by Chuck Oleson, owner of Oleson Microwave Labs, Morgan Hill, California. Chuck spoke about recent advances in Millimeter Wave equipment at frequencies up to 230 GHz! Performance characteristics of various spectrum analyzers and mixers were reviewed. The chapter also is working very hard on the upcoming 2004 EMC symposium in Santa Clara. Monthly steering committee meetings are held at Apple Computer in Cupertino, California. Stay tuned for further details on the 2004 Symposium.


Seattle EMC Chapter members network following the January chapter meeting held at CKC Labs in Redmond.

While Dr. Archambeault's presentation was interesting, the Seattle Chapter Chair felt an obligation to get the chapter members home at a reasonable hour!

Over 70 people attended the February Seattle EMC Chapter meeting held at Microsoft in Redmond. Dr. Bruce Archambeault was the speaker on the hot topic: "Effective Power/Ground Plane Decoupling for PCBs."
Janet O'Neil introduces speaker Dennis King of FerriShield at the January meeting of the Seattle EMC Chapter.
The Seattle EMC Chapter was privileged to be the first chapter to feature Dr. Archambeault in his capacity as a newly appointed Distinguished Lecturer.
The Seattle EMC Chapter Officers congregated after the great meeting with Dr. Archambeault. Shown left to right are Mark Chase of CKC Labs, Secretary, Kitty Tam of Microsoft, Treasurer, Janet O'Neil of ETS-Lindgren, Chair, and Pat André of André Consulting, Vice-Chair.

Tom Moyer of AR/Kalmus was the first speaker at the Seattle Chapter's March "Double-Header" meeting. He prepares to set up his demo of BCI testing with the encouragement of Chapter Chair Janet O'Neil.

The March Seattle EMC Chapter meeting featured the tag team of Pat André and Mark Chase on "Common EMI Problems and How to Troubleshoot Them."

Seattle EMC Chapter member Steve Anderson of Alpha Technologies assisted Jeannie Olson of AR/Kalmus in picking up following the March chapter meeting held at her facility in Bothell.

 

Seattle
At its January 2003 meeting, the Seattle EMC Chapter featured "The Future of Ferrite" as presented by Dennis D. King of FerriShield. This meeting was held at CKC Labs in Redmond. Some 25 people attended. Mr. King showed how the use of ferrites has been applied to several new EMI disciplines, specifically custom materials and products for Bluetooth and WiLAN applications, and custom products for EMI suppression on unique replacements for traditional wire and cable harnesses. Mr. King's company has been producing custom parts for X2Y Attenuators, LLC and some of those results were discussed in this meeting. In February, the attendance record for a Seattle EMC Chapter meeting was broken as 73 people attended the meeting! This is a new, all time high attendance record! Folks came to hear Dr. Bruce Archambeault, IEEE EMC Society Distinguished Lecturer, speak on the topic "Effective Power/Ground Plane Decoupling for PCBs." This meeting was held at Microsoft who generously provided free pizza and beer for the social hour before the presentation. Decoupling of power and ground-reference planes is an important issue for both EMI emissions control and for circuit functionality. This topic has generated many technical papers, and controversy. While there has been a lot of attention on this topic, there is still significant confusion about the best strategy for decoupling. Dr. Archambeault's talk focused on the sources of noise that the decoupling capacitors are intended to control, and the physics involved in the noise propagation, and how to properly analyze the decoupling capacitor performance. The analysis must be performed in BOTH the time domain and the frequency domain. The frequency domain analysis is a steady state analysis, and will determine resonances, which are most useful for EMI emissions analysis. The time-domain analysis is a transient analysis and will help determine how well the current is delivered to the IC, and ultimately, how large (or small) the generated noise pulse will become. Real-world examples of measurements, as well as computer simulations, were used to demonstrate the optimal decoupling strategy. Dr. Bruce Archambeault is a Senior Technical Staff Member at IBM in Research Triangle Park, NC. He received his Ph. D. from the University of New Hampshire in 1997. His doctoral research was in the area of computational electromagnetics applied to real-world EMC problems. He is the author of the book "PCB Design for Real-World EMI Control" and the lead author of the book titled "EMI/EMC Computational Modeling Handbook." In March, in keeping with the start of baseball season, the chapter featured a double-header meeting! Speakers included Thomas C. Moyer of Amplifier Research on "RF Conducted Immunity Testing" and the tag team of Mark Chase of CKC Labs with Pat André of André Consulting, Inc. on "Common EMI Problems and How to Troubleshoot Them." The meeting was scheduled from 4-8 pm at AR/Kalmus in Bothell. Tom Moyer explained that RF conducted immunity testing is one of the most difficult tests for the EMC engineer to implement. This is true because the IEC 61000-4-6 specification is difficult to comprehend and it uses terminology that is not entirely familiar to the US engineer. Often the RF conducted immunity test has to be performed using bulk current injection (BCI) for CE marking, telecom and automotive testing. The BCI test adds more complexity to the RF conducted immunity test because great care must be taken to avoid over injection of current. Over injection of current during this test can lead to EUT failures that are bogus resulting in possible erroneous rejection of otherwise good products. Tom covered the requirements of the IEC RF conducted immunity specifications and provided a demonstration of BCI testing. The audience learned that Tom worked for Ford Motor Company designing automotive electronics systems and for Ametek U. S. Gauge designing aircraft engine instruments before joining Amplifier Research in 1996 as a product line-marketing specialist. In between presentations, Texas Smokehouse BBQ catered a buffet dinner. Next, Pat André and Mark Chase took the stage and shared a variety of equations, design, and troubleshooting techniques. These included impedance equations, wavelength calculations, case shielding and design considerations, and even how to wind a balun. Examples from actual situations were presented. A short question and answer period followed the presentation. This presentation by Seattle EMC Chapter officers Pat and Mark was practical, educational, and entertaining as well! Chapter members learned that Pat André is NARTE Certified as both an EMC Engineer and as an ESD Engineer. He has worked in the military and aerospace environment for the entire 19 years, and worked in the commercial electronics environment for the last seven. Pat has a strong ability in the test and measurement area of EMC. He is president of André Consulting, Incorporated. Pat also works for the Seattle Gilbert and Sullivan Society as the Sound Designer. But, all in all, he would rather be golfing. Mark Chase is currently a Senior EMC Engineer at CKC Labs in Redmond. He has published and presented several papers at the IEEE EMC Society annual symposia. Before joining CKC Labs in 1998, he was with Hewlett Packard in Vancouver, Washington for eight years where he worked in Bob Dockey's famous EMC lab. Much of his expertise is in troubleshooting and near field probe design. But, all in all, he would rather be back on stage playing guitar.


Sendai Chapter members attended the chapter initiation ceremony.

Sendai, Japan
The Sendai Chapter, which is located in the birthplace of Japanese EMC research, held a ceremony celebrating the chapter's establishment. Thirteen members joined the ceremony with many honored guests from the EMC Tokyo Chapter and the IEEE Sendai Section. A buffet party celebrating that Professor Risaburo Sato received the Richard R. Stoddard Award from the EMC Society followed the ceremony. You can visit the Chapter's web page to see the photo album of the meeting at www.topic.ad.jp/emc-sendai/. In addition, the Sendai Chapter held two more research and technical meetings in the year of 2002. Chapter members are currently making preparations for the 2004 EMC International Symposium in Sendai on June 1-4, 2004. EMC

 


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