Chapter Chatter
I am excited to begin in this issue with a three part mini-series entitled, “Dorm Life with Engineering Students.” These stories have come from my favorite and most trustworthy source of humorous engineering stories, Steve Jensen (of Steve Jensen Consultants, Inc.). Steve assures me that these stories have/have not been greatly embellished over time in order to clarify/add humor to the actual/imagined events. Part 1, “Special Power,” also includes some important background information. The stories are narrated from Steve’s perspective.

Special Power
When reading these accounts, one must remember that the state of the art for personal entertainment devices and clocks was vacuum tube table top (so called “5-tube”) radios and synchronous motor driven clocks, respectively. A table model radio of the era (referenced in one of the stories) would typically be capable of AM reception only and include a clock that was capable of turning on the radio at a preset time or as an alarm clock. I attended UCLA Engineering College from the fall of 1958 until the summer of 1963 (I was slow as I was one of the students that made the upper half possible). During the years 1960 and 1961, I was a resident of Dykstra Hall, which was the first “coed” (by floor) dormitory on the campus. Sproul Hall, another “coed” dormitory was under construction during my first year as a dorm resident and completed during my second year (1961). Sproul Hall figures in one of the three stories, hence the reference to it. Typically, almost all of the residents of the dorms had a clock radio of the type mentioned previously. I had a total of four different roommates during that time. At least two of them inspired me to enter into the adventures of the three stories.
First, let me explain the arrangement of the individual room power distribution for the residents. A common wall, made of composite particle board, separated each dorm room from another. Each room was fitted with two desks, one for each occupant. Above each desktop, was a single incandescent lamp fixture with a spun aluminum lamp shade. Just below the lamp was a single 115 V outlet into which we immediately plugged our multiple outlet adapters (sometimes referred to by the fire department as “octopuses”) to run all our “stuff”. The lamp/outlet fixture was attached to the outlet box by two long screws, which if removed was nearly impossible to realign with the little threaded ears in the outlet box to re-install. One day, (I can’t remember why), I removed my lamp fixture from the wall. I discovered that also exposed was the backside of my neighbor’s power/lamp outlet assembly and associated wiring. Now, my neighbor at the time had an annoying habit. Everyday, his clock-radio was set to turn on a very loud rock and roll station at 6 AM. As the walls were (virtually) transparent acoustically, this also served to wake my roommate and myself at 6 AM, whether we needed to wake up or not. The next important element of this story is that my roommate, a fellow named Alfred “Al” Egan (whom I have never heard from since college) was a hi-fi enthusiast. He had all the latest Harmon Kardon stereo receivers and amplifiers. Most memorable was the 100 watt stereo amplifier (all vacuum tubes of course) that was the envy of many, including me. My interests were amateur radio, amongst other things, and I had a very well outfitted junk box of various electronic components (that mostly served to take up precious space in our small room). However, one evening, I observed that I had a large push-pull audio power output transformer designed to couple plate voltage output of a push-pull audio amplifier to either four ohm or eight ohm speakers. I also owned a Heathkit audio oscillator (something no self respecting ham operator should be without). The combination of all of these assets, plus the observation that I had access to my neighbor’s AC power supply, gave rise to one of our finest experiments. The idea was that if the speaker output of Al’s power amplifier were connected to the speaker windings of the plate transformer I owned, we could get high voltage AC from the plate windings. Using the Heathkit audio oscillator as a source, we could get any frequency we wanted as well (within the bandwidth limits of the amplifier and transformer, of course). Remembering that the speed of synchronous motors was proportional to the power frequency applied, we decided to conduct an experiment. We setup what could best be described as a “death trap” switching arrangement involving a double pole, double throw knife switch that allowed us to connect our neighbor’s power either to the building supply 115 VAC 60 Hz or the output of our “special power supply”. We determined that we could easily generate 115 VAC, at any frequency from 30 Hz up to around 10 kHz! Also, we could hear the gears in the neighbor’s clock by sound conduction through the wall. We had nearly 120 watts of power available (1 ampere) and that was plenty to operate the neighbor’s clock radio. While the neighbor was away at class one day, we connected our source to his power outlet and by listening to the gear noises determined that his clock would continue to operate all the way up to 180 Hz! This meant that we could run his clock at 3 times its normal speed! Having laid the ground work, we restored the neighbor to commercial power and waited that evening for him to retire. Somewhere around 11 PM we switched him over to 180 Hz power and listened with satisfaction to the resultant high speed gear noises from his clock. Predictably, at around 2 AM, the clock radio turned on with full-blast rock and roll music. We heard some commotion over there and listened for the results. After a couple of minutes, we heard his door open and close and we peeked out our door to see him walking down the hall to the community bathroom. He had his shaving kit in hand and towel over his shoulder and proceeded on into the bathroom. Within about 3 minutes, he apparently realized that it was still pretty dark outside and that he was all alone in the “head” at a time that would normally be pretty busy. He came stomping back down the hall, into his room and slammed the door. Shortly, we heard a loud “crashing” noise followed by sounds of shattering plastic and glass. This we later determined was the impact of his clock radio against the wall, which (at least temporarily) terminated our problem with the 6 AM rock and roll music. We never bothered to inform him of our experiment figuring that silence was in the best interest of our continued health and good fortune. We were of course pleased to find that the synchronous clock motors of the day would operate all the way to 180 Hz before stopping entirely. It was a very successful experiment conducted in the true spirit of “sound” engineering principles.

 

Professor Vesna Roje from the University of Split, FESB, started the process of forming the Croatia EMC Chapter in February 2005.
Students, engineers, and faculty visit the Croatia EMCS “Career Day” booth held at the University of Split, FESB.
The Croatia EMCS “Career Day” booth held at the University of Split, FESB drew plenty of attention.

 

Welcome New Chapter: Croatia
The Croatia Chapter has been formally accepted into the EMCS fold and will likely hold their first “formal” meeting in September. They hope to have an IEEE EMCS Distinguished Lecturer and/or an EMC Society BoD member present for the festivities. Organization of the Croatia Chapter began in 2004 and was led by Professor Vesna Roje of the University of Split. During the organizing process, 14 signatures were gathered from members of the IEEE EMC Society in Croatia. The Chapter was formally recognized in March 2005. Although the inauguration meeting of the Chapter has not yet occurred, they have already begun to encourage researchers, engineers and students to become members of the IEEE and EMC Society. The Chapter was represented in July at the University of Split, FESB Career Day. The Croatia Chapter members had many opportunities to explain the benefits of being a member of the IEEE and the EMCS. Croatia will start out as a small Chapter but they are willing to improve membership through the tighter connections with the IEEE. They strongly believe that the future lies in the inclusion of young people in technology professions. On July 2, the Chapter members and interested guests held a small organizational meeting. Professor Roje, Chapter chair, gave a short report analyzing the participation of the Chapter at the Career Day at the University of Split, FESB (Faculty of Electrical Engineering, Mechanical Engineering and Naval Architecture). The future activities and the plans for the inauguration meeting were also discussed.

Elya Joffe during his presentation at the inaugural meeting of the EMCS Poland Chapter.
Attendees of the Poland Chapter meeting (from left) Wojciech Gwarek -MTT Society Distinguished Lecturer, Maciej Walkowiak, Wojciech Krzystofik, Andrzej Sowa, Miroslaw Zielenkiewicz, Wojciech Pluta, Ryszard Zielinski, Andrzej Kucharski, and Fryderyk Lewicki.
Attendees of the Poland Chapter meeting (from left) Marian Soinski, Tadeusz Wieckowski, Elya Joffe, Andrzej Karwowski (Chapter founder and Chair), Daniel Bem, Krzysztof Sieczkarek, and Wojciech Bandurski.
Attendees of the Poland Chapter meeting (from left) Tadeusz Wieckowski, Elya Joffe, Andrzej Karwowski, and Krzysztof Sieczkarek.
Poland Chapter attendees relaxing after their June 30 meeting.
Professor Gwarek explains advantages of time-domain EM simulation methods.
Andrzej Karwowski, Poland Chapter founder and Chair.


Welcome New Chapter: Poland
The newly registered IEEE Polish EMC Chapter held its inauguration meeting on June 30 in Wroclaw. The meeting was hosted by the Wroclaw University of Technology (WUT), Wroclaw, as an event joined with a three-day (June 29 - July 1) 5th National Workshop on Electromagnetic Compatibility organized by the Institute of Telecommunications, Teleinformatics and Acoustics, WUT, in cooperation with the national regulatory authority, i.e., the Office of Telecommunications and Post Regulation. On June 30, the technical sessions and social events (including a banquet) of the Workshop were open at no charge to Chapter members. The technical program included a morning plenary session with two excellent presentations delivered by the invited speakers. One presentation, “Frequently Asked EMC Questions (and Answers)” was given by Elya Joffe, EMCS BoD Member. A second presentation was given by Professor Wojciech Gwarek from Warsaw University of Technology, Poland, Distinguished Lecturer of IEEE MTT Society, entitled, “Application of Modern EM Field Simulators for Designing High-Frequency Passive Structures.” Over 70 people attended the technical session. The administrative/organizational meeting was opened at 2:00 PM by one of the Chapter founders and nominated Chairman of the Chapter, Professor Andrzej Karwowski (Silesian University of Technology, Gliwice). Professor Karwowski welcomed honorary guests: Elya Joffe, VP of the EMC Society, and Professor Daniel J. Bem, Chair of EMC Section of the Committee of Electronics and Telecommunications, Polish Academy of Sciences, as well as the Chapter members who attended the meeting. After the round of introductions, Andrzej briefed members on the status of the Chapter having 27 active members. Then, Elya Joffe passed on the EMCS BoD’s message to the Chapter. Elya also gave a presentation entitled, “IEEE and EMC Society Membership... Why?” explaining the benefits of joining IEEE and EMCS. Before closing the meeting, Andrzej expressed thanks to Mr. Joffe for joining the inauguration meeting of the Polish EMC Chapter, and gratitude to Professor Tadeusz Wieckowski, VP of the Wroclaw University of Technology, and Chairman of the Workshop, for providing rooms, equipment, technical assistance and significant financial support for the meeting. Here is a little more about Professor Andrzej Karwowski, chairman of the new Polish Chapter. Professor Karwowski received the M.Sc., Ph.D., and D.Sc. (Habilitation) degrees in electronics in 1969, 1976, and 1984, respectively, from the Wroclaw University of Technology (WUT), Wroclaw, Poland. From 1969 to 1984 he was with the WUT, Wroclaw, holding academic positions from Assistant to Associate Professor. From 1985 to 1986, he was with the Wroclaw Branch of the National Institute of Telecommunications – a telecom R&D center active in the fields of network development and national/international standardization of communication systems and equipment. In 1987, he joined the faculty of Automatic Control, Electronics and Computer Science, Silesian University of Technology, Gliwice, Poland, where he currently holds a position of a Professor. Dr. Karwowski’s research interests are generally in electromagnetic engineering, specifically in development and application of numerical modeling techniques to radiation, scattering and coupling problems. For many years, Dr. Karwowski has served as a member of the Program Committee of the International Wroclaw Symposium and Exhibition on EMC. Due to his contributions to this Symposium, he has been appointed to be Chair of the Program Committee since 2004. Dr. Karwowski also serves as a Vice Chair for AP-S of the AES/AP/MTT Joint Chapter, Poland Section of the IEEE.

Attendees gather after Dr. Ianoz’ lecture in Nanjing organized by the Beijing Chapter, including (from left), Zhou Xushen, Lu Shuyan, Professor Gao Cheng, Yi Yun, Professor Shi Lihua, Professor Ianoz, Mi Jianping, Yang Guohua, Guo Hong, Lizicheng, Chen HaiLin, Dr. Yu Tong Bin, and Ren Heming.
Nanjing attendees discussing the presentation of Dr. Ianoz included (from left to right) Professor Shi Lihua, Ren Heming (graduate student), Professor Ianoz, Professor Gao Cheng and Dr. Yu Tongbin.
Dr. Ianoz during his May presentation to the Beijing Chapter in Nanjing, China.
Professor Ianoz pictured at the welcome sign before his presentation in Nanjing, China.
Professor Ianoz and his wife enjoyed the local foods after his Nanjing, China presentation. Pictured also are Professor Shi Lihua (top left) and Ren Heming (top right).
Professor Ianoz, Professor Shi Lihua (right) and Professor Gao Cheng (left) enjoy a technical discussion during one of the breaks at the meeting in Nanjing.


Beijing
On the invitation of Professor Gao Yougang, Chairman of the EMC Chapter, Beijing Section, IEEE, Professor Michel Ianoz visited Nanjing, a beautiful city in the southeast of China. During his stay in Nanjing, Professor Ianoz was invited to give a lecture to the students and teachers in the local universities. The lecture was held by Nanjing Engineering Institute and was presented at the Lijin Garden Hotel in Nanjing on May 18.
The lecture started at 9:00 in the morning and ended at 12:30. During the three and a half hours, he made two presentations. The topics were lightning electromagnetic effects and field-to-transmission line coupling computational methods. The audience was from South East University, Nanjing University of Science and Technology, Nanjing Institute of Post & Telecommunication and Nanjing Engineering Institute. Since 2002, Nanjing Engineering Institute has been using the book EMC Analysis Methods and Computational Models co-authored by Drs. Frederick M. Tesche, Michel Ianoz, and Torbjörn Karlsson as a text book for graduate students. Most of the students taking the class in this school term attended the lecture. After the lecture, Professor Ianoz held a two hour discussion in the afternoon. He answered the questions posed by the audience and introduced to them some papers that contain further information. The research group on lightning electromagnetic pulse at Nanjing Engineering Institute is working in the direction very close to the topic of the lecture. They discussed with Professor Ianoz about the lightning return stroke model, calculation of LEMP environments near the lightning channel, coupling analysis and measurement techniques. Over the past few months, a number of other, excellent presentations were also given to the Beijing Chapter. Each was well attended by IEEE members and non-members. For example, following is a list of the meetings:

  • On May 16, “Antennas for UWB Applications,” by Doctor Zhi Ning Chen.
  • On May 26, “EMC in Structural Design: Framework, Standards, Spectrum, and RF Circuits” by Professor Quan Xin Jiang.
  • On May 27, “EMC in Structural Design: Shielding, Grounding, Connecting and Filtering,” by Associate Professor Zhong Yuan Li.
  • On May 27, “High Power EM Pulse and Protection” by Professor Bi Hua Zhou.
  • On May 27, “EM Scattering and Radiation in RF EMC,” by Professor Jin Ping Xu.
  • On June 9, “Closed Form Green’s Functions for Planar, Cylindrical, and Spherical Geometries: Fundamental Issues,” by Professor Le Wei Li.
  • One June 9, “Simple Formula of a Patch Capacitor on a Grounded Substrate of Two Layers,” by Professor Y. Leonard Chow.
  • On June 10, “Characterization, Design, and Synthesis of Metamaterials of Low Loss and Broad Bandwidth,” by Professor Le Wei Li.
  • On June 13, “Introduction of Galileo Satellite Navigation System with Applications,” by Professor Gustavo Balfort.
  • On June 20, “Antennas and Propagation for Galileo Satellite Navigation System,” by Professor Paola Pirinoli.
  • On June 21, “Unconditionally Stable FDTD algorithms â€, Myth or Reality?” by Professor Ji Chen.

Central New England
John Clarke reports that the Central New England Chapter held two meetings to date during 2005. Boris Shusterman and John Clarke have continued as Co-Chairs of CNEC/EMCS during 2005. On Wednesday, April 27, the CNE Chapter held a meeting dealing with the subject, “Ferrite Cores for EMI Suppression”. The speaker was Paul Zdanowicz of Fair Rite Products Corporation, Walkill, New York. Whether designing or testing, his presentation helped engineers and technicians to understand the basic operation of ferrite materials and components. Learning about the various ferrite materials available and their performance characteristics will help individuals to quickly find the solution for any particular application. Paul’s presentation contained information which will assist the attendees to specify and choose ferrite components for EMI suppression. The speaker covered the basic operation of ferrite material followed by an in depth discussion of EMI suppression and the significance of test methods on components for particular applications. In attendance were 18 IEEE members and 16 guests. (Most IEEE members were also EMCS members.) The CNE Chapter held its 2nd meeting of 2005 on Wednesday, June 22. The topic was, “Taking the Guesswork Out of EMC/EMI Design,” by David P. Johns, Ph.D., Vice President of Electromagnetic Engineering, Flomerics, Inc. In the past, EMC/EMI design has been far from an exact science. EMC/EMI engineers have not always been able to say, “Do it like this and it will work”. Instead, by drawing on past experience and applying general design guidelines, engineers have said, “Do it like this and it may work”, or, “This is more likely to work, but at a higher cost”. To make matters worse, EMC/EMI design is a constantly moving target. The electromagnetic environment is flooding, due to the proliferation of wireless communications devices. Electronics products are emitting higher frequencies due to faster switching and circuits are becoming more sensitive to interference. Design techniques that worked in the past may not work in the future. Considerable guesswork is involved. There is a growing desire for EMC/EMI engineers to identify problems earlier in design, to be more definite and accurate in their recommendations and to minimize the test, fix, re-test cycle, enabling products to pass compliance and enter the market quicker. Electromagnetic simulation tools have matured considerably over the last five years and offer tremendous opportunity for EMC/EMI engineers to work more effectively and with greater confidence. Dr. Johns’ presentation included examples of electromagnetic simulation applied to real-world EMC/EMI design problems, emphasizing the value that simulation offers over and above general design rules. For this presentation, we had 29 attendees, consisting of 11 IEEE (6 EMCS members) and 18 guests. The next CNE Chapter meeting is scheduled for September 2005.

Carla Robinson of US Robotics discusses a new Rohde & Schwarz receiver with Vic Hudson at the booth of Electronic Instrument Associates during the Chicago MiniSymposium.
Jack Black, Chicago Chapter Chair, presents two plaques to Don Sweeney (right) of DLS Electronic Systems for speaking at the MiniSymposium.
Jack Black, Chapter Chair, presents Frank Krozel of Electronic Instrument Associates with the “EMC Person of the Year” Award.
Frank Krozel, Chairman, EMC MiniSymposium, introduces to the attendees Tom Braxton, Chairman of the 2005 IEEE Symposium on EMC (center) and Jack Black, Exhibits Chairman (right).


Chicago
The Chicago Chapter held another successful EMC MiniSymposium. Many new manufacturers were in attendance at this eighth annual event. Chicago is pleased to announce that they actually sold out on booths this year! The speakers had riveting presentations and all in attendance left with new insights in EMC. A special thanks to all the speakers from the Chicago Chapter.

France
The French Chapter enjoyed two very interesting technical presentations on June 27th. First, a paper on the “Study of Low-Frequency Electromagnetic Problems Using Static and Quasi-Static Methods” was given by Alain Reineix (Université de Limoges). Next, Yannick Béniguel (IEEA) spoke about, “Use of the Method of Integral Equations for Magnetostatic Problems.” The French Chapter is also involved in the preparation of the symposium on embedded EMC to be held in Rouen on 26-27-28 September 2005. Please see the French Chapter Website at http://e2mc.esigelec.fr

Officers of the Germany Chapter welcome key note speakers Nigel Carter (second from right) and Elya Joffe (second from left) to their EMC Workshop on April 18.
Germany EMC Chapter officers gather for a meeting in April.


Germany
The IEEE German EMC Chapter held a one day workshop on April 14, 2005. Numerous technical presentations were given on aircraft system related EMC topics. After a welcome of speakers and attendees by the vice chair Jan Luiken ter Haseborg, the technical program started with a visit to the EMC laboratory at the Hamburg University of Technology. During the morning session speakers addressed topics such as protection against ultra-wideband signals, conducted and radiated RF propagation in aircraft systems and measurement of ultra-wideband field signals. After mental and physical refreshment during the lunch break, the workshop conducted with presentations delivered by the two key note speakers Nigel Carter and Elya Joffe. Nigel Carter is the Technical Manager for Electromagnetic Environmental Effects (E3) in the Electromagnetics Group, of QinetiQ, in the UK. Nigel has been working in the field of E3 for over 30 years. His primary work is research in the development of test and analysis methodologies for assessing the vulnerability of both civil and military land, sea and air assets to electromagnetic environmental effects. His work has produced test procedures that have been encompassed in various forms in national and international standards. In his presentations on “The EM Environment of Modern Aircraft” and “Aircraft HIRF Test Techniques” he shared his outstanding experience and knowledge with participants. In his presentation on the EM environment, he stressed the aspect that the environment definition, testing, and aircraft specification is a result of a delicate balance between cost and safety. After a detailed survey over past investigations and a characterization of internal and external environments, he turned to current and future challenges and problems. Of particular interest were the increasing use of electronics in critical areas, and the reliance on electronic sensors in combination with new (non metallic) materials resulting in increasing vulnerability against electromagnetic fields. Nigel closed his first presentation with a comparison of civil and military environment definitions. In his second presentation, Nigel answered the question how the hardness of an aircraft against high intensity radiated electromagnetic fields (HIIRF) can be tested. Starting with the idea of a perfect test, he presented existing test facilities for whole aircraft field testing. Due to physical and legal restrictions as well as to cost, whole system tests are not always possible. To solve this problem, Nigel Carter introduced the participants to the concepts of alternative test techniques, like the Low Level Swept Current Test (LLSC), the Low Level Swept Field Test (LLSF) or the High Level Direct Drive. Elya Joffe, the second key note speaker, is the Vice President for Engineering at K.T.M. Project Engineering in Kfar Sava, Israel, and works as a Senior EMC engineering specialist and consultant. He has over 20 years of experience in government and industry, in EMC/E3 for electronic systems and platforms (in particular, aircraft and aerospace). He is actively involved, as an EMC/E3 specialist, in the EMC design of commercial and defense systems, from circuits to full platforms. His work covers various fields in the discipline of EMC, as well as numerical modeling for the solution of EMC problems. Elya is a very popular speaker with many IEEE EMC Chapters and similar organizations around the globe. His presentation on “EMI Anomalies and Their Solutions” complemented the speeches of Nigel Carter. Elya started with a survey of EMI sources, he continued background information on EMC standards, and delivered a fruitful collection of EMI cases, which pointed out various aspects of EMI. The cases covered power supply interactions, coupling to instruments, filter and bonding problems, and unpredicted interference between certified equipment. The intensive discussion of all cases, problems and solutions, confirmed the high interest of all participants in the presented material. At the end of the workshop, the chair of the German EMC Chapter, Frank Sabath, thanked all speakers for their presentations and Jan Luiken ter Haseborg for his support and hosting the workshop. He pointed out that the slides of the key note speeches can be downloaded from the home page of the German Chapter (www.ewh.ieee.org/r8/germany/emc). Lastly, he announced that the German Chapter is organizing a workshop on numerical field computation, which is scheduled for May 2006.

Leo Makowski receives a sample of shielding materials from Gary Fenical at the Central New England (CNE) Chapter’s May meeting. Also pictured are Past Chapter Chairman PJ Modin (far left) and Patrick Griffin (far right).
Member introductions at the start of April’s Portland Product Compliance Colloquium and Exhibition. Can you find Todd Hubing in this photo?
Henry Benitez, President of Electromagnetic Investigations, LLC, and Colloquium Co-Chair.
Derick Skouby and Dr. Todd Hubing take in the Vendor Exhibits, as always a popular part of an EMC Colloquium.
After a full morning of informative presentations, Colloquium participants line up for lunch in the Vendor Exhibition Room, for refueling, camaraderie, and networking.
Clark Vitek spoke at the May meeting of the Oregon and SW Washington Chapter.
Dave Britton (Chapter Chair) presided over the May meeting in Portland, Oregon.


Northern Virginia-Washington DC
Leo Makowski, Vice-Chair for the Washington DC/Northern Virginia Chapter, reports that they just held their 3rd meeting of 2005 and are now taking their summer recess. The most recent meeting was held on Thursday, May 19 at Marriott’s Wardman Hotel. Gary Fenical from Laird Technologies gave a presentation on “New Developments in Shielding Materials.” His presentation was kept lively with Gary’s incorporation of real-world examples of how the technology is used by industry and cost savings are being made. In addition to the many questions from the audience, the showing of different types of material now being used for shielding materials kept his talk very interactive. The manufacturing challenges of the highly integrated and complex products, cell phones, PDAs, radios, etc, are of particular interest. As Gary pointed out, the shielding is necessary for device function, as opposed to solely meeting regulatory requirements. After Gary’s presentation, Mike Violette of Washington Laboratories gave an update on the progress being made on the Chapter’s bid to host the 2010 IEEE EMC Symposium. Many of the attendees were interested in being part of the committee to bring the conference back to the DC area. Everyone is eagerly awaiting the Society’s decision later this year. The Chapter’s next meeting is scheduled for September 15. For more information, contact Leo Makow-ski at makowski@hvtechnologies.com.

Oregon and SW Washington
In April, the Oregon and SW Washington Chapter and the Product Safety Technical Committee (PSTC) held their planned joint Portland Product Compliance Colloquium and Exhibition. The well-attended Colloquium featured technical presentations on EMC, Product Safety, and Environmental Regulatory topics. Speakers and specific topics included:

Mr. Henry Benitez: Product Compliance Standards and Regulations
Dr. Daniel Ma, for Dr. Ruud Overbeek: WEEE & ROHS Directives for Electrical and Electronic Equipment
Dr. Todd Hubing: EMC Design at the Printed Circuit Board Level Integrated Circuit EMC System Level EMC
Mr. Richard Nute: Effective Safety Certification Processes Root Causes for Portable Power Supply Recalls Preview of the IEC Hazard-Based Standard – Electrically-Caused Injury

The May chapter meeting featured a presentation by Clark Vitek, Senior EMC Engineer with Extreme Networks, Inc. A member of CISPR Subcommittee A Working Groups 1 and 2, he has attended CISPR SC/A meetings as a United States delegate since June 2000 and since 2004 has served as the Technical Advisor for the US National Committee of the IEC for CISPR SC/A. He has served as project leader for working group projects on measurement facility validation and measurement methods above 1 GHz. He is also presently the convener of a CISPR SC/A and SC77B Joint Task Force on Fully Anechoic Rooms. Drawing from his recent and current CISPR work, Mr. Vitek’s presentation on “Site Validation above 1 GHz (CISPR Proposals)” provided his audience with valuable insights into what new site validation work would be required to implement the new CISPR “reflection-free” test protocols under consideration. Information about future chapter meetings can be found at the following web site: http://www. worldaccessnet.com/~emc/

Daryl Gerke speaks to the Phoenix Chapter on using differential diagnosis to troubleshoot radiated emissions.
Dr. Heyno Garbe speaks to the Phoenix Chapter on understanding and avoiding EMC problems with LAN’s.


Phoenix
Harry Gaul reports that in April, the Phoenix EMC Chapter welcomed their very own Daryl Gerke to speak. Daryl gave a well-received talk on “Diagnosing and Troubleshooting EMI Problems”. He began the talk by sharing his philosophy of troubleshooting, which he has refined over many years of being an “EMI guru” troubleshooter. First, he stated that one has to develop an “emergency room” mentality with a fast response because the “patient” is often in pain. The initial information is often confusing or incomplete. And, the situation may also be tense, so the troubleshooter has to keep cool. The first step is to diagnose and then try fixes because “prescription without diagnosis is malpractice”. Daryl offered up many examples of failures and fixes ranging from ESD to emissions to power disturbances. He also addressed the pros and cons of fixes implemented at the board level versus at the enclosure level. Daryl shared the contents of his magic box of tricks including foil, copper tape, screen, ferrites, and EMI filters. Daryl concluded his talk by emphasizing the need to first diagnose the problem through the gathering and critiquing of data followed by making a plan. The actual fixing of the problem then involves iterating between predicting and monitoring the outcome of fixes. On May 25, the IEEE EMC Phoenix Chapter meeting was held at Garcia’s Mexican Restaurant in Tempe. After Chapter business, Harry Gaul introduced our featured speaker, Professor Dr. - Ing. Heyno Garbe, a Distinguished Lecturer of the EMC Society. Professor Garbe is currently Dean for Education at the Department of Electrical Engineering and Information Technology at the University of Hanover, Germany. Professor Garbe is very active in several EMC related national and international standardization committees. He is a Senior Member of the IEEE, as well as a member of URSI Com. E, VDE, and the IEEE EMC, AP, IMT and MTT Societies. Since 1997, he has served as chairman of the German Chapter of the EMC Society and is currently serving on the Board of Directors of the EMC Society. Professor Garbe started his presentation “Understanding and Avoiding EMC Problems of LANs” by covering the basic fundamentals of attenuation and Near End Cross Talk (NEXT). He spoke of field coupling to several kinds of wire structures, and the effects of common mode to differential mode transformation in balanced versus unbalanced transmission lines. He defined LAN cable structures and their uses including internal shields which tend to reduce wire-to-wire crosstalk, and overbraid shields which reduce field to cable coupling. He also covered digital noise sources that one may encounter in a LAN system. For instance, LAN-emitted digital noise tends to be stochastic and it is important to calculate the power spectral density to ascertain if a noise problem may be evident. Interestingly, Professor Garbe showed a graph which compared the power spectral densities of 10, 100 and 100 base-T Ethernet signals, which showed that 10 base-T signals have the highest amplitude in the lower frequency ranges. If a system tends to be susceptible in the 10 base-T range, then the 10 base-T emitter would be worst-case among the three. The important thing to understand is that the digital encoding affects the potential of susceptibility. Professor Garbe also mentioned the importance of a well terminated cable shield. Terminating a cable shield at one end is not enough. Dr. Garbe showed experimental results indicating that a one-end terminated shield would have the same shielding effectiveness as a completely unshielded cable at higher frequencies where LAN noise is prevalent. He joked that one could save money by simply avoiding all shielding if the design included one-end termination. He also spoke of long pigtail terminations, which are responsible for poor shielding effectiveness. One conclusion that that he drew was that the radiated emissions from LAN cables due to the differential signal is pretty small because of the balanced nature of the signal. The more severe threat is power supply chopper noise which may be present on the LAN wiring. In this case, the power supply noise is common mode so the twisting/balancing provides no reduction. Thus, the shielding of the twisted pairs is necessary to reduce the emissions. Finally, Professor Garbe covered the increasingly popular Broadband Power Line Communications Systems, which of course are not shielded. He implied that these are noisy systems indeed. Several questions arose at the end of the talk, including a lively and positive exchange discussing the importance of maintaining a ‘balanced’ design. Information on future meetings is available on the Phoenix EMC Chapter Web site at http://www.ewh.ieee.org/r6/ phoenix/phoenixemc/.

Clark Vitek of Extreme Networks (far right) welcomes Seattle Chapter members to the May meeting held at CKC labs in Redmund, Washington.
Mr. Vitek appreciated the extended question and answer period following his presentation to the Seattle chapter.
Attendees intently listen to Clark Vitek’s presentation to the Seattle Chapter. Harry Hodes of Acme Testing (in orange shirt) in particular kept discussion lively following the presentation.
Up close and personal with Clark Vitek at the Seattle Chapter meeting.


Seattle
In April, there was no regularly scheduled meeting as the Chapter traveled south to attend the Oregon and SW Washington Chapter colloquium and exhibition. In May, regular Chapter meetings resumed. Clark Vitek of Extreme Networks was the invited speaker. The meeting was held at CKC Labs in Redmond on May 24. A dedicated audience representing test labs (CKC Labs and Acme Testing), industry (Intel and Philips Medical) as well as representative firms (Lionheart Northwest and Del Black Associates) came to hear the presentation on “Site Validation Above 1 GHz”. Since 1999, CISPR Subcommittee A has been evaluating various proposals to include in CISPR 16-1-4 for site validation above 1 GHz. This work has recently reached the first voting stage (CDV) and will be voted on by December 2005 by the National Committees of the IEC. The method proposes to use a technique based upon evaluation of site VSWR, which uses a method that requires no previous antenna factors or reference measurements in order to evaluate a site. However, this method also presents some new challenges for existing facilities in that good quality microwave absorber is typically required on all surfaces, including the floor, in order to meet the requirement of the proposed standard. Clark provided an overview on the background of the site VSWR method and discussed results from various EMC facilities evaluated by the proposed technique. With his extensive involvement in CISPR activities, Clark knew first hand much about the topic. As a member of CISPR Subcommittee A Working Groups 1 and 2, Clark has attended CISPR SC/A meetings as a United States delegate since June 2000 and since 2004 has served as the Technical Advisor for the US National Committee of the IEC for CISPR SC/A. The presentation was followed by a very lively question and answer period. All enjoyed the simulating discussion, especially the speaker who appreciated the interest shown. The Chapter will take the months of June, July and August “off” for the summer season, and will resume activity on September 20 with an eagerly awaited presentation by EMCS Distinguished Lecturer, Chris Holloway of NIST. For more information on the activities of the Seattle EMC Chapter, visit the Seattle Section website at www.ieee-seattle.org.

Dr. Koichi Ito giving his presentation, “Antenna Technology Applied to Medicine” to the Singapore Chapter.
Professor Iton gives a very popular and well attended presentation to the Singapore Chapter in March.


Singapore
The Singapore Chapter recently held several well attended technical seminars. On March 8, Professor Tatsuo Itoh presented, “Microwave Devices Based on Composite Right/Left-Handed (CRLH) Transmission Line Metamaterial.” This meeting was organized by the IEEE Singapore EMC and MTT/AP Chapters and held at the Marina Mandarin, Singapore. Just three days later on March 11, Mr. Liu Enxiao, gave a presentation at the Institute of High Performance Computing (IHPC), Singapore, entitled, “Analysis of High-Speed Interconnect by FDTD-Macromodeling Method.” Then, Dr. Koichi Ito gave a seminar regarding, “Antenna Technology Applied to Medicine”. This event took place on March 11 at the Institute for Infocomm Research in Singapore.

Mark Steffka of General Motors and the University of Michigan at Dearborn, Henry Ott of Henry Ott Consultants, and Kimball Williams of Denso International America (from left) prepare for the start of EMC Fest 2005 organized by the SE Michigan Chapter.
Henry Ott presented “Dipoles for Dummies” and “Partitioning and Layout of Mixed Signal PCB” to a rapt audience of over 120 people during the SE Michigan’s EMC Fest 2005.

 

SE Michigan
To those of us who have rail guns languishing in our basements, the Naval Railgun launching presentation on February 16 by Lt. Seth Miller to the SE Michigan chapter was inspiring. Naval railguns are potentially more robust than present technology because they have much of their targeting information determined at the time of launch. A shipboard naval railgun should be able to deliver a projectile at a range of 200 nautical miles in 6 minutes with a Mach 5 terminal velocity. Discussion of engineering conundrums being encountered by the Naval Railgun team invoked lively discussion as potential ways to channel high magnetic fields and coolant at the same time was discussed. A favorite moment of the speech was when Lt. Miller noted that when the railgun cables were unbalanced, the whole I-beam assembly used to launch projectiles was severely deformed. On March 16, the National Radio Quiet Zone (NRQZ) presentation by John Ford to the SEM chapter ended with an invitation to all attending to visit the Robert C. Byrd Green Bank Telescope (GBT), a 100 meter diameter radio telescope nestled in the Deer Creek Valley in Eastern West Virginia. John Ford, Electronics Division Head at GBT, discussed the difficulties of keeping the facilities quiet enough to utilize the radio telescope. They had to repackage all the high efficiency lights in the facility in order to keep the facility quiet enough to allow use of the radio telescope. Facility engineers also ended up finding illegal taps into the nearby cable television system because of the radiation resulting from them. On May 3, the Chapter’s annual EMC Fest one day colloquium and exhibition was held. Over 120 people attended! The speaker was industry renowned Henry Ott. Mr. Ott reminded us that it was not the radiation of the individual components so much as the radiation of the system when he showed us a piece of equipment that radiated like a loaded top hat dipole. He explained the reference plane concept of dipoles without using one equation and allowing us insight into how all conductors are antennas and those conductors with a nearby reference plane have more radiating power. This was thoroughly reviewed in his “Dipoles for Dummies” presentation. In his presentation titled “Partitioning and Layout of Mixed Signal PCB,” he explained how we should never put holes in the middle of ground planes due to the trouble it causes. EMC


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