EMCABSEMCABSFollowing are abstracts of papers from previous EMC symposia, related conferences, meetings and publications.
EMCAB COMMITTEE
Mike Crawford, Consultant
Bob Hunter, Consultant
Prof. Fujiwara, Nagoya Inst. of Technology
Sha Fei, EMC Research Section, N. Jiatong Univ., Beijing, China
Ferdy Mayer, L.E.A.D., Maisons, Alfort France
Perry Wilson, EMC Baden, Ltd., Switzerland
Heinrich Garn, Austrian Research Center
Engineering college/university libraries, public libraries, company or corporate libraries, National Technical Information Services (NTIS), or the Defense Technical Information Center (DTIC) are all possible sources for copies of abstracted articles or papers. If the library you visit does not own the source document, the librarian can probably request the material or a copy from another library through interlibrary loan, or for a small fee, order it from NTIS or DTIC. Recently it became clear that EMCABs were more timely than publications which were being listed in data files. Therefore, additional information will be included, when available, to assist in obtaining desired articles or papers. Examples are: IEEE, SAE, ISBN, and Library of Congress identification numbers.
Also, the steering staffs of the Japan Technical Group and the EMC Japan Tokyo Chapter have offered to act as a central point for requests of papers abstracted here. Most of the papers will be available in Japanese only. Abstracts of papers from EMC Japan will be clearly identified. The steering staff will assist in routing your request to the author(s) but will not translate the papers. The contact person is Professor Osamu Fujiwara, Department of Electrical and Computer Engineering, Nagoya Institute of Technology, Gokiso-Cho, Showa-ku, Nagoya 466, Japan. E-mail: sfujiwara@odin.elcom.nitech.ac.jp
Some of the Chinese papers are not available in English. Associate Professor Sha Fei, EMC Research Section, Northern Jiatong University, has offered his time and assistance in routing requests for papers to the appropriate author(s). He is not furnishing a translation service.
As the EMC Society becomes more international, we will be adding additional worldwide abstractors who will be reviewing articles and papers in many languages. We will continue to set up these informal cooperation networks to assist members in getting the information or contacting the author(s). The library at Southwest Research Institute, 6220 Culebra Road, San Antonio, Texas, 78228-0510 has agreed to catalog, shelve, and have available for interlibrary loans proceedings from symposia and meetings which are donated to the library. Any such donations can be sent to my attention at my address shown on page 3 of this Newsletter. I will review them for suitable articles and then forward them to the SWRI library. We are particularly interested in symposium proceedings which have not been available for review in the past. Thank you for any assistance you can give to expand the EMCS knowledge base.
| TIME QUANTITY ONE-CYCLE
CONTROL FOR POWER-FACTOR CORRECTORS Z. Lai, K. M. Smedley,Y. Ma Department of Electrical and Computer Engineering, University of California, Irvine, CA IEEE Transactions on Power Electronics Vol. 12, No. 2, March 1997, pp. 369-375 Absract: The use of dc-dc converters for active input current shaping is documented in the references. The method disclosed has advantages of operation at a constant switching frequency and a simpler control than previously described ac-dc converters. The one-cycle control technique is adopted in a boost converter to modulate the pulse width. The result is a power supply that presents a resistive input resistance to the line and substantially reduces total harmonic distortion to less than 3%. Index Terms: Switching converters, power factor correction, harmonic reduction |
COMMENTS ON EPIDEMIOLOGIC PAPERS RELATED
TO CHILDHOOD LEUKEMIA AND MAGNETIC FIELDS OF POWER LINES (PART 2) Yoshifumi Amemiya EMC-Japan meeting at Kikai-Shinko-Kaikan, Tokyo July 17, 1997, EMCJ97-33 Abstract: The Swedish investigation of epidemiology, which has been carried out on cancers in children residing near high- voltage power lines in and around Stockholm County during 1960-1985, shows us the conclusion that there is significant association between the historical magnetic fields calculated and childhood cancer. Employing its data of the stratum-specific analyses, we can find out the following facts on cases associated with the magnetic fields’ none in children diagnosed 1960-74 in and around. Stockholm County; ones, diagnosed 1975-85 only around its County. They show that the association is not consistent in the periods and areas considered. Therefore, the association is not a causal relation, and the conclusion which suggests that the same association is to be observed everywhere is not valid. Index terms: Magnetic field, childhood leukemia, cancer, Karolinska, epidemiology, National Academy of Sciences |
| ANTENNA ARRANGEMENTS FOR BROADBAND EMI
ANTENNA CALIBRATION Takuya Nagai, Akira Sugiura, Yukio Yamanaka, and Takashi Iwasaki EMC-Japan meeting at Kikai-Shinko-Kaikan, Tokyo July 17, 1997, EMCJ97-26 Abstract: To improve the accuracy of antenna calibration for broadband EMI antennas, theoretical and experimental studies are made on possible causes of the calibration errors. The accuracy is found to be seriously affected by (1) the uniformity of the field in which an antenna under calibration is immersed, (2) the directivity of the antenna in the vertical plane, (3) the directivity in the horizontal plane, (4) the mutual coupling between the transmit and receive antennas, and (5) ambient noise. Taking these error factors into consideration, the most appropriate antenna arrangements are determined to achieve antenna calibration with an accuracy of better than 0.5 dB at 300 MHZ. Index terms: Antenna calibration, EMI antenna, biconical antenna, log-periodic dipole array antenna, directivity, moment method |
AN IMPROVEMENT OF INPUT PROPERTIES IN A
SLOT-COUPLED MICROSTRIP ANTENNA WITH A PARASITIC STRIP Kohichi Ozaki, Manabu Yamamoto, and Kiyohiko Itoh EMC-Japan meeting at Hokkaido University, Hokkaido September 26, 1997, EMCJ97-34 Abstract: In a slot coupled microstrip antenna with a triplate line feed, the parallel plate mode can be successfully suppressed when the antenna is operated at the series resonant frequency of the radiating patch. However, the antenna has low input resistance in this case. In this report, we perform analytical considerations on the input properties of the antenna to achieve high input resistance at the series resonant frequency. Numerical results indicate that input resistance is decreased because of the inductive effect due to the slot. Then we propose the use of a parasitic strip to cancel the inductive effect and confirm the increase of the resistance. Index terms: Slot-coupled microstrip antenna, triplate line, parallel plate mode, series resonant frequency, parasitic strip |
| INPUT IMPEDANCE OF EQUIPMENT HOUSING WITH AN APERTURE FOR EMI ESTIMATION
INSIDE THE HOUSING Yusuke Hamada, Hiroaki Kogure,Hideki Nakano, Kohji Koshiji, and Eimei Syu EMC-Japan meeting at Kikai-Shinko-Kaikan, Tokyo July 17, 1997, EMCJ97-29 Abstract: Resonant modes inside equipment housing with an aperture are analyzed by TLM method for EMI estimation inside the housing. The analyzed resonant frequencies agree well with the measured frequencies. Ideal cavity without aperture has an infinite number of resonant modes. However, some modes of them in the housing with an aperture are disappeared by existence of the aperture. This means that resonant modes excited through the aperture can be specified under consideration of dimension and position of the aperture. The input impedance of the housing inside through the aperture is also analyzed by TLM method, since the input impedance is indispensable for the magnitude estimation. Index terms: Equipment housing, aperture, TLM method, resonant mode, EMC |
A MAGNETIC PROBE WITH MULTILAYER STRUCTURE FOR HIGH SPATIAL RESOLUTION Naoya Tamaki, Norio Masuda, and Masahiro Yamaguchi EMC-Japan meeting at Hokkaido University, Hokkaido September 26, 1997, EMCJ97-36 Abstract: This paper describes a shielded loop probe with multilayer structure for high spatial resolution to measure magnetic fields near a trace on surface of printed circuit boards(PCBs). The probe is fabricated with four layer PCBs. According to replacing a coaxial cable of the conventional probe by a strip line, it can acquire smaller loop size and shorter distance between the probe and the trace in comparison with the conventional probe. The spatial resolution is evaluated by measuring magnetic field distribution above the trace. It is indicated that the probe has over twice spatial resolution than the conventional probe. Index terms: PCB, magnetic fields, high spatial resolution,multilayer structure, shielded loop probe |
| HF-UHF BAND ELECTROMAGNETIC MEASUREMENTS USING MULTI-LAYER PRINTED WIRING
BOARD Sin Yabukami, Masahiro Yamaguchi, and Kenichi Arai EMC-Japan meeting at Hokkaido University, Hokkaido September 26, 1997, EMCJ97-37 Abstract: We have developed new microstrip line type pick up coil and shielded loop type coil, which are planar type pickup coil using by multi layer printed wiring board technique. Magnetic thin film permeability can be measured from 1MHz-3.5GHz range to take into account of electric field and impedance matching. We developed electromagnetic noise mapping system using by shielded loop type coil array. High resolution (0.1mm) and vector detection can be realized. Index terms: Microstrip, shielded loop, magnetic thin film permeability, electromagnetic noise. |
EVALUATION OF APPLICABILITY FOR SEMI-ANECHOIC CHAMBER AS TEST SITE ABOVE
1GHz Yoshinobu Hayashi, Takashi Shinozuka, Yasuo Hashimoto, and Risaburo Sato EMC-Japan meeting at Hokkaido University, Hokkaido September 26, 1997, EMCJ97-49 Abstract: Requirements of test site for EMI measurement above 1GHz are now under consideration. Only free-space condition comes to an agreement. The users of semi-anechoic chambers currently used below a semi-anechoic chamber, and then investigated the requirements to realize a free-space condition by covering the electromagnetic absorbers for widths greater than the first Fresnel zone are installed on the floor of the current semi-anechoic chamber, free-space conditions are satisfied within a precision level of 2dB for horizontal polarized waves and 2.5dB for vertical polarized waves. Index terms: Measuring test site, semi-anechoic chamber, free space condition, height pattern site attenuation above 1GHz, electromagnetic absorbers |
| STUDY ON RADIO ABSORPTIVE MATERIAL USING GRAPHITIZED CARBON Fumio Sakamoto, Yoshio Nikawa, and Masaru Chino EMC-Japan meeting at Hokkaido University, Hokkaido September 26, 1997, EMCJ97-42 Abstract: Radio absorptive materials in microwave and millimeter wave frequencies, which can be used for the hazardous EM radiation circumstances, have been studied. For the measuring frequencies from 40 MHZ to 40 GHz, the materials dispersed graphitized carbon in silicone rubber are discussed. For the single layer radio absorptive materials, it is found that good absorptive characteristics can be obtained as long as narrow frequency band. Also, for the two layer radio absorptive materials, it is found that absorptive bandwidth can be obtained wider than that obtained for single layer radio absorptive materials. Index terms: Comples permittivity, radio absorptive, graphitized carbon |
TWO-DIMENSIONAL AND HIGH-RESOLUTION NEAR FIELD NOISE MAPPING SYSTEM M.yamaguchi, S. Yabukami, K.Nakada, K.I. Arai, A. Itagaki, K. Itagaki, N. Saito, K. Fuda, M. Watanabe, H. Takahashi, T. Tamogami, and Y. Sakurada EMC-Japan meeting at Akita University, Akita October 27, 1997, EMCJ97-52 Abstract: We developed near field noise mapping system by using shielded loop type coil array. High resolution (0.1mm) and Two-dimensional magnetic field vector detection can be realized. We demonstrated the noise map of Loop antenna, microstrip line and printed wiring board of personal computer. Index terms: Shielded loop, near field electromagnetic noise, high resolution, vector measurement |
| DEVELOPMENT OF PHANTOMS AS A HUMAN MODEL AT MICROWAVE FREQUENCY Lira Hamada, Rong Wang, Yoshinobu Okano, Kazuyuki Sato, Keiichi Matsumura, and Koichi Ito EMC-Japan meeting at Hokkaido University, Hokkaido September 26, 1997, EMCJ97-43 Abstract: A lot of phantoms have been proposed as the human model for experimental evaluation of the effect between the human body and electromagnetic fields around. In this report, phantoms in two types are introduced as the human model realizing the same permittivity as biological tissue. First, the solid phantom for a model of human is described. Next, the characteristics of the liquid phantom composed of water and silicone emulsion have been introduced. Index terms: Human model, phantom, complex permittivity, specific absorption rate |
FDTD COMPUTATION OF TEMPERATURE-RISE IN THE HUMAN HEAD DURING DAILY USE OF
PORTABLE TELEPHONES Jianqing Wang, and Osamu Fujiwara EMC-Japan meeting at Akita University, Akita October 27, 1997, EMCJ97-60 :Abstract: In this paper, temperature-rises in the human head for portable telephones were computed with an anatomically based head model. The specific absorption rate (SAR) in the human head was determined using the finite difference time-domain (FDTD) method, while a bioheat equation, which takes into account various heat exchange mechanisms such as heat conduction, blood flow and electromagnetic (EM) heating, was numerically solved also using the FDTD method. Computed results show that, for an uncontrolled environment, application of the ANSI/IEEE safety guidelines restricting the one-gram-averaged peak SAR to 1.6 W/kg results in maximum temperature-rises in the brain of 0.05 degrees centigrade at 900 MHZ and 0.06 degrees centigrade at 1.5 GHz, and application of the ICNIRP/Japan safety guidelines restricting the ten-gram-averaged peak SAR to 2 W/kg results in maximum temperature-rises in the brain of 0.10 degrees centigrade at 900 MHZ and 0.11 degrees centigrade at 1.5 GHz. Index terms: Biological effects, SAR, temperature-rise, portable telephone, anatomically based head model, FDTD computation |
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