EMCABS

Following are abstracts of papers from previous EMC symposia, related conferences, meetings and publications.

EMCABS COMMITTEE
Bob Hunter, Consultant
r.d.hunter@ieee.org
Sha Fei, EMC Research Section, Northern Jiatong
University, Beijing, China
emclab@center.njtu.edu.cn
Ferdy Mayer, L.E.A.D., Maisons, Alfort France
FerdyMayerLEADFrance@compuserve.com
Maria Sabrina Sarto, Department of Electrical Engineering, University of Rome, Italy
sarto@elettrica.ing.uniroma1.it

“How Can I Get a Copy of an Abstracted Article?”
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, you can 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.
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). 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. EMC

EMCABS: 01-02-2004
ANALYSIS ON SHIELDING EFFECTIVENESS OF METALLIC ENCLOSURES WITH SLOT
Yingpeng Fan, Zhengwei Du, Ke Gong, and Guoding Li
State Key Lab on Microwave and Digital Communications, Department of Electronic Engineering, Tsinghua University, Beijing 100084, China
E-Mail: fanyp99@mails.tsinghua.edu.cn, zwdu@mail.tsinghua.edu.cn, gongk@mail.tsinghua.edu.cn, ligd@ee.tsinghua.edu.cn
Proceedings of Asia-Pacific Conference on Environmental Electromagnetics CEEM’2003, Hangzhou, China, November 4-7, 2003, pp. 43-46.
Abstract: In this paper, the FDTD method is used to study shielding effectiveness varied with slot length, width and cavity size. The results show that slot resonance will occur when the slot perimeter reaches odd times of wavelength of incident wave. The shielding effectiveness would become rather poor in such cases.
Index terms: Metallic enclosure with slot, shielding effectiveness, resonance, FDTD analysis.

EMCABS: 02-02-2004
Analysis of resonance characteristics of a power bus with rectangle and triangle elements in multi-layer pcbs
Zhi Liang Wang, Osami Wada, Yoshitaka Toyota and Ryuji Koga
Dept. of Communication Network Engr., Faculty of Engineering, Okayama University, Tsushima-naka 3-1-1, Okayama 700-8530, Japan
E-Mail: Zlwang@cne.okayama-u.ac.jp
Proceedings of Asia-Pacific Conference on Environmental Electromagnetics CEEM’2003, Hangzhou, China, November 4-7, 2003, pp. 73-76.
Abstract: One of the major sources of radiated EMI is attributed to power bus resonance in a printed circuit board (PCB). A fast algorithm, combined with the segmentation method, is applied for calculating resonance characteristics of a power bus whose pattern consists of several segments of rectangles and/or right-angled triangles. Good agreement between the calculated and measured results demonstrates the usefulness and accuracy of the fast algorithm and the segmentation method.
Index terms: Printed circuit board, EMI, power bus resonance, analysis.

EMCABS: 03-02-2004
Fdtd calculation of organ resonance characteristics in an atomically based human model for plane-wave exposure
Jianqing Wang, Naomasa Mukaide and Osamu Fujiwara
Department of Electrical and Computer Engineering, Nagoya Institute of Technology, Gokiso-cho, Showa-ku, Nagoya 466-8555, Japan
E-Mail: wang@odin.elcom.nitech.ac.jp
Proceedings of Asia-Pacific Conference on Environmental Electromagnetics CEEM’2003, Hangzhou, China, November 4-7, 2003, pp. 126-129.
Abstract: It is well known that electromagnetic (EM) energy is absorbed in-homogeneously in the human body even for plane-wave exposure. This implies that local resonance for various individual organs may occur. In order to investigate this implication, we analyzed numerically the organ resonance characteristics in the frequency range from 30 MHz up to 3 GHz with an anatomically based high-precision human body model and a parallel finite-difference time-domain (FDTD) technique. As a result, we found that the whole-body resonance occurring around 65 MHz causes the local resonance for all the organs at the same frequency. Local resonance peculiar to each of organs was also found to occur around 900 GHz for the brain, eyes and heart, 600 MHz for the testicles, and so on.
Index terms: Plane-wave exposure, SAR, human whole-body model, organ resonance, parallel FDTD calculation.

EMCABS: 04-02-2004
A study on the field radiated by esd
Zhu Changqing, Liu Shanghe and Wei Ming
Ordnance Engineering College, Shijiazhuang, Hebei Province, China
E-Mail: zhuneil@163.com
Proceedings of Asia-Pacific Conference on Environmental Electromagnetics CEEM’2003, Hangzhou, China, November 4-7, 2003, pp. 209-212.
Abstract: For evaluating electrostatic discharge radiation immunity test of electronic devices, by simulating and modeling, the paper has investigated the characteristics of the field radiated by the electrostatic discharge current that is specified in the IEC 61000-4-2 standard.
Index terms: Electrostatic discharge (ESD), field radiated by ESD, modeling, simulation.

EMCABS: 05-02-2004
Numerical study of esd field distribution in a metallic cavity
Bi Zengjun and Liu Shanghe
Electrostatic and Electromagnetic Protection Research Institute, Mechanical Engineering College, 97# Heping West Road, Shijiazhuang, 050003, China
E-Mail: bizengjun@163.com
Proceedings of Asia-Pacific Conference on Environmental Electromagnetics CEEM’2003, Hangzhou, China, November 4-7, 2003, pp. 221-224.
Abstract: In this paper, distribution of the electromagnetic field generated by an electrostatic discharge spark in a metallic cavity is analyzed using the FDTD method. A numerical model of the field distribution is established. The field distributions, while discharging at the center of the cavity and at the center of the cavity wall, are calculated respectively using the model and some conclusions are drawn.
Index terms: Metallic cavity, electrostatic discharge, field distribution, FDTD analysis.

EMCABS: 06-02-2004
Prediction and analysis for inter-system electromagnetic compatibility
Bin Gao and Xiaobin Tang
Academy of Electronics and Information Technology, Beijing China 100041
Proceedings of Asia-Pacific Conference on Environmental Electromagnetics CEEM’2003, Hangzhou, China, November 4-7, 2003, pp. 314-318.
Abstract: Prediction and analysis for inter-system electromagnetic compatibility (EMC) are studied in this paper. To study the EMC status of the systems quantitatively, an electromagnetic interference margin (IM) is adopted. Compared with the IM of an inter-system, whether the electromagnetic interference (EMI) occurs among the systems or not can be known. Prediction and analysis of inter-system EMC are done in the information platform; some conclusions and some primary interference suppression steps are made.
Index terms: Inter-system, IM, EMC, EMI, electromagnetic radiation.

EMCABS: 07-02-2004
Radiated immunity/susceptibility characteristics of actual chassis by using an electromagnetic wave of rotating polarization
Kimitoshi Murano+, Majid Tayarani++, Fengchao Xiao+++ and Yoshio Kami+++
+Department of Communications Engineering, Tokai University, Hiratsuka-shi, Kanagawa 259-1292, Japan
++Electrical Engineering Department, Iran University of Science and Technology, Narmak, Tehran 16844, Iran
+++Department of Information and Communication Engineering, The University of Electro-Communications, 1-5-1 Chofugaoka, Chofu-shi, Tokyo 182-8585, Japan
E-Mail: murano@dt.u-tokai.ac.jp, m_tayarani@iust.ac.ir, xiao@ice.uec.ac.jp, kami@ice.uec.ac.jp
Proceedings of Asia-Pacific Conference on Environmental Electromagnetics CEEM’2003, Hangzhou, China, November 4-7, 2003, pp. 323-326.
Abstract: To evaluate radiated immunity/susceptibility characteristics for the chassis of an electronics product with a complex configuration, the authors have proposed a new test method using an electromagnetic field whose polarization rotates slowly. By using this method, three-dimensional characteristics are depicted such that weak/strong directions against various field polarizations could be obtained easily. In this paper, as an application of this method, a tower-type personal computer chassis is considered and its three dimensional characteristics are obtained. It should be mentioned that it is very difficult to theoretically evaluate and/or estimate the above characteristics. Therefore, the proposed test method would be expected in a phase of developing products.
Index terms: Immunity testing, EM wave of rotating polarization, tower-type chassis, measurement.

EMCABS: 08-02-2004
Practical measurement procedure for em radiation from base stations in taiwan
Wen-Tron Shay, Ray-Rong Lao and Wenlie Liang
CMS/ITRI, Bldg. 16, Kuang Fu Rd, Sec.2, Hsinchu, Taiwan
Proceedings of Asia-Pacific Conference on Environmental Electromagnetics CEEM’2003, Hangzhou, China, November 4-7, 2003, pp. 605-608.
Abstract: Although there are some international or national standards that recommend a measurement method of electromagnetic fields for safety purposes, nevertheless, few of them provide detailed measurement procedures specifically for base stations. Therefore, we propose a practical measurement procedure to the Environment Protection Agency (EPA) in Taiwan for measuring electromagnetic radiation from AM, FM, TV and mobile phone base stations. In this paper, we present the new proposed measurement method, which is suitable for the majority of practical situations.
Index terms: Base stations, electromagnetic radiation, safety evaluation, practical measurement procedure.

EMCABS: 9-02-2004
Measurement of the frequency-dependant dielectric constant of concrete materials by tdr and wavelet modeling method
Shi Lihua, Xu Qiwei, Chen Bin and Gao Cheng
EMP Laboratory, Nanjing Engineering Institute, No.1 Haifuxiang, Nanjing 210007, China
Proceedings of Asia-Pacific Conference on Environmental Electromagnetics CEEM’2003, Hangzhou, China, November 4-7, 2003, pp. 626-629.
Abstract: Time-domain reflectometry has been widely used in the measurement of a material’s electromagnetic properties. In order to obtain the spectrum of dielectric constant, the measured waveforms need to be analyzed by FFT. Because of multi-reflections in the measured waveform, it is sometimes difficult to extract a clear reflection for analysis and the final results may not be accurate. A wavelet modeling method was used in this paper to extract the frequency-dependant dielectric constant in the measured time-domain waveform. By transforming the measured signal into a series of frequency bands and recognizing it according to the composition of reflections, this method can reduce the effect of multi-reflections on the measurement results.
Index terms: Time-domain reflectometry, frequency-dependent dielectric properties, wavelet modeling, measurement.

EMCABS: 10-02-2004
CHARACTERISTICS OF THE RF NOISE SUPPRESSOR USING Ni-Zn (-Co) FERRITE AND CoNbZr SOFT MAGNETIC FILMS ON COPLANAR TRANSMISSION LINE
Ki Hyeon Kim+, Shinji Ikeda+, Masahiro Yamaguchi+, Nobuhiro Matsushita++ and Masanori Abe++
+Dept. of Electrical and Communication Engineering, Tohoku Univ., Sendai 980-8579, Japan
E-mail: kee@ecei.tohoku.ac.jp, s-ikeda@ecei.tohoku.ac.jp, yamaguti@ecei.tohoku.ac.jp
++Dept. of Physical Electronics, Tokyo Institute of Technology, Tokyo 152-8552, Japan
E-mail: nob@pe.titech.ac.jp, amasanor@pe.titech.ac.jp
Proceedings of 2003 Asia-Pacific Microwave Conference, Seoul, Korea, November 4-7, 2003, pp. 866-869.
Abstract: The RF electromagnetic noise attenuation on a coplanar transmission line was investigated using the newly developed spin sprayed Ni-Zn (-Co) soft ferrite films with high resistivity. The RF noise suppressor was composed of magnetic film/polyimide/Cu coplanar transmission line/seed layer on glass substrate. The insertion loss was less than 0.5 dB below 1 GHz and it rapidly increased in the GHz range by the combination of ferromagnetic resonance losses and eddy current losses. The coplanar transmission line with a characteristic impedance of 50 ohm had a 50 mm-wide and 3 mm-thick signal line. The power loss of the coplanar transmission line with CoNbZr film was higher than that of Ni-Zn(-Co) ferrites at GHz range when an 7.5 mm-thick insulating layer was provided in-between the transmission line and magnetic film. It results from the large eddy currents in metallic magnetic CoNbZr film (120 m-ohm cm relatively low resistivity), which is based on the low resistivity in comparison with that of ferrites films (5.17 x 104 ohm cm - 2.40 x 105 ohm cm). On the other hand, the insulator below the magnetic film can be removed only for the case of ferrite because of the high resistivity. Then the power loss became as large as that of the CoNbZr film with an insulating layer over 1 GHz.
Index terms: Coplanar transmission line, RF noise suppressor, soft ferrite films, power loss.

EMCABS: 11-02-2004
Reduction of Multilayer PCB Edge Radiation Excited by Through-Hole Signal Via with De-Cap Fence
Jun So Pak, Junwoo Lee and Joungho Kim
Korea Advanced Institute of Science and Technology, 373-1, Gusung-Dong, Yousung-Gu, Daejeon, Korea
E-Mail: chitoong@eeinfo.kaist.ac.kr, fluxus@eeinfo.kaist.ac.kr, joungho@ee.kaist.ac.kr
Proceedings of 2003 Asia-Pacific Microwave Conference, Seoul, Korea, November 4-7, 2003, pp. 870-873.
Abstract: In a multilayer PCB (printed circuit board), chips need layers for DC power supply, i.e. DC ground plane and DC power plane. Also, these planes are used for RF reference of signal traces. A signal trace with a through-hole signal via, which is used for signal layer transition, has a different RF reference at each signal trace. Therefore, the signal trace has a loading effect of power/ground planes, which are considered as a parallel plate cavity with an open boundary condition. Namely, the signal voltage on traces is coupled to power/ground planes and the coupled voltage is transferred to the open edge and the voltage at the open edge is a radiation source. This paper discusses the loading effect of power/ground planes, the excitation of power/ground planes by through-hole signal via, and the radiation at the open edge of power/ground planes. Finally, the De-Cap fence can reduce the radiation by reducing voltage at the edge.
Index terms: Multi-layer printed circuit board, edge radiation, through-hole signal via, De-Cap fence.

EMCABS: 12-02-2004
Power Bus Noise Analysis Using Wideband Ferrite Bead Model
Shin-Young Yi+, Woo-Sin Choi+, Kyoung Ju Son++ and Hai-Young Lee+
+Department of Electronics Engineering, Ajou University, Wonchon-dong Paldal-gu Suwon Kyonggi-do 442-749, Republic of Korea
E-Mail: efrog95@ajou.ac.kr, usinc@ajou.ac.kr, hylee@ajou.ac.kr
++Gigalane, Kyonggi Small Business Center, San 111-8 Iui-dong, Paldal-gu, Suwon, Kyonggi-do 442-270, Republic of Korea
E-Mail: kjson@gigalane.com
Proceedings of 2003 Asia-Pacific Microwave Conference, Seoul, Korea, November 4-7, 2003, pp. 874-877.
Abstract: The SMT (Surface Mount Type) ferrite bead used to reduce power bus noise is modeled in series and parallel circuits with resistor(R), inductor (L) and capacitor(C). In general, equivalent circuit modeling doesn’t agree with the measurement result. In this paper, we propose the accurate equivalent circuit model of the ferrite bead at wide frequency range (50 MHz - 3 GHz) and analyze the effect to the high speed IC (Integrated Circuit).
Index terms: Power bus noise, surface mount type ferrite bead, wideband equivalent model, analysis. EMC