Following are abstracts of papers from previous EMC symposia, related conferences, meetings and publications.
Bob Hunter, Consultant
r.d.hunter@ieee.com
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
Osamu Fujiwara
Associate Editor
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 of 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. As a member of the steering staff, I will assist in routing your request to the author(s) but will not translate the papers.
Some of the Chinese papers are not available in English. Professor Sha Fei, EMC Research Section, Northern Jiatong University, has offered his time and assistance in routing requests for papers to 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). 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.
EMCABS: 01-08-99
A DESIGN METHOD OF DECOUPLING CIRCUITS FOR A DIGITAL PCB
TO REDUCE HIGH FREQUENCY CURRENT ON POWER AND GROUND PLANESY.
Fukumoto* e-mail: fukumoto@isl.mei.co.jp,
S. Nakamura**, O. Wada** and R. Koga**
* Matsushita Electric Industrial Co. Ltd., Osaka 571-8501, Japan, **Okayama
University, Okayama 700-8530, Japan
Proceedings of 1999 International Symposium on Electromagnetic Compatibility, Tokyo, Japan, May 17-21, 1999, pp.9-12
Abstract: This paper describes a design technique of decoupling circuits that can reduce high frequency current rushing into power/ground planes of a digital PCB. In this technique, IC is modeled as a current source of high frequency, and a parameter that represents the effect of the high frequency current reduction is derived. Then, by using the parameter, a design procedure to obtain the optimal bypass capacitor and the decoupling inductor is shown. Furthermore, validity of this modeling is shown by experimental study.
Index terms: Printed circuit board, emission, decoupling circuit.
EMCABS: 02-08-99
CHARACTERIZATION OF PRINTED CIRCUIT BOARDS INCLUDING
MAGNETIC FILM USING FINITE ELEMENT ANALYSIS
F. Cortial-Goutaudier*, S. Hoshino**, M. Iwanami**, H. Tohya** and Y. Saito***
e-mail: cortial@ccrl-nece.technopark.gmd.de
* NEC Europe Ltd., 53757 Sankt Augustin, Germany, ** NEC Corporation, Kanagawa,
Japan, *** Hosei University, Tokyo, Japan
Proceedings of 1999 International Symposium on Electromagnetic Compatibility, Tokyo, Japan, May 17-21, 1999, pp.13-16
Abstract: A method to evaluate the characteristics of printed circuit boards containing magnetic films is proposed. By means of electromagnetic field distribution computed from a combined finite element method and strategic dual image method, the equivalent circuit parameters R, L, C are determined. The employed methodology which accounts for eddy currents, displacement currents and hysteresis is detailed in case of 2D axisymmetric problems. Then two simple PCB configurations are investigated. The results clearly show that the NiZn ferrite composite material included in one PCB reduces EMI efficiently.
Index terms: Printed circuit board, emission, magnetic film, finite element method.
EMCABS: 03-08-99
A NOVEL PHYSICALLY-BASED PSPICE-COMPATIBLE-MODEL FOR COMMON-MODE-CHOKES
P.F. Okyere and E. Habiger, e-mail: philip.okyere@decrc.mail.abb.com
Proceedings of 1999 International Symposium on Electromagnetic Compatibility, Tokyo, Japan, May 17-21, 1999, pp.33-36 Dresden University of Technology, D-01062 Dresden, Germany
Abstract: In this paper a new physically based PSPICE-compatible model for common-mode chokes for the prediction of EMI-filter size and insertion loss is presented. Skin-effect inside the winding and the non-linear characteristic of core materials can be considered. The model parameters can be obtained from the winding and the core geometry. The accuracy of the model is demonstrated for a typical EMI-filter in a high frequency switched mode power supply.
Index terms: Common-mode choke, EMI-filter, PSPICE.
EMCABS: 04-08-99
A METHOD TO EVALUATE ELECTRIC FIELDS INDUCTION OF OVERHEAD LINES AND SUBSTATION’S
EQUIPMENT IN HUMANS
G. Ala, P. Buccheri and M. Inzerillo, e-mail: m.inzerillo@dielectricslab.diepa.unipa.it,
Palermo University, Palermo, Italy
Proceedings of 1999 International Symposium on Electromagnetic Compatibility,
Tokyo, Japan, May 17-21, 1999, pp.161-164
Abstract: In this paper a method to accurately simulate the human body under a high voltage overhead line or in proximity to substation’s equipment is proposed, in order to evaluate the electric field and currents on the human body surface. Based on the charge simulation and Maxwell sub-areas methods, the computer program developed allows consideration of complex systems, including three-dimensional multiple overhead lines, bus-bar system, grounding wires, supporting lattice towers and metallic elements as reinforcing bars.
Index terms: Biological effect, overhead line, substation’s equipment, electric field induction.
EMCABS: 05-08-99
MICROWAVE ABSORPTION PROPERTIES OF M-TYPE HEXAGONAL FERRITE COMPOSITE SHEET
H. Ota*, M. Kimura*, R. Sato*, K. Okayama**, S.-I. Kondo** and M. Homma**, e-mail:
ota@emc-l.co.jp * Electromagnetic Compatibility
Research Laboratories Co. Ltd., Sendai 989-3204, Japan ** Tohoku University,
Sendai 980-8579, Japan
Proceedings of 1999 International Symposium on Electromagnetic Compatibility, Tokyo, Japan, May 17-21, 1999, pp.420-423
Abstract: The microwave absorption properties of M-type hexagonal ferrite BaFe_12-x (Ti_0.5Mn_0.5)_x O_19 composite have been investigated. An optimized TiMn substituted ferrite composite exhibited a wide absorption bandwidth nearly double that of conventional spinel ferrite composites in the X-band for both normal and 30 degree oblique incidence. The composite sheet exhibited exactly the expected absorption characteristics and this demonstrated the advantage of utilizing the ferrimagnetic resonance of M-type hexagonal ferrite for microwave absorbers.
Index terms: Microwave absorber, hexagonal ferrite, composite sheet.
EMCABS: 06-08-99
NEAR- & FAR-FIELDS TEST SYSTEM OF PORTABLE RADIOS EMI TO ELECTRONIC DEVICES
Y. Tarusawa and T. Nojima, e-mail: tarusawa@mlab.yrp.nttdocomo.co.jp
NTT Mobile Communications Network Inc., Yokosuka-shi, Kanagawa, Japan
Proceedings of 1999 International Symposium on Electromagnetic Compatibility, Tokyo, Japan, May 17-21, 1999, pp.472-475
Abstract: A new EMI (ElectroMagnetic Interference) test system to estimate the immunity of electronic devices is proposed. This system directly exposes the devices to the near- and far-fields generated by a dipole antenna and/or actual mobile phone. In addition, an in-vitro experimental system for pacemaker EMI investigation is introduced. This method uses the antenna input power and the distance between the antenna and device-under-test as the test parameters instead of E-field strength. The transmitting signal properties of present mobile phones in Japan (800MHz- and 1.5GHz-PDC, 1.9GHz-PHS, etc.,) are clarified to analyze EMI due to mobile radio wave exposure. A practical test procedure is also described. The summarized experimental results of EMI tests conducted on 228 pacemakers and 499 medical devices are shown to confirm the fact that the proposed system is indispensable for the EMI assessment of mobile phones.
Index terms: Portable radio, EMI, test system, medical device.
EMCABS: 07-08-99
SUPPRESSION OF TV-GHOSTS CAUSED BY SUSPENSION BRIDGE USING A WAVE ABSORBER
T. Aoyagi, A. Nishikata and Y. Shimizu, e-mail: aoyagi@cradle.titech.ac.jp
Tokyo Institute of Technology, Tokyo 152-8552, Japan
Proceedings of 1999 International Symposium on Electromagnetic Compatibility, Tokyo, Japan, May 17-21, 1999, pp.488-491
Abstract: A vertically-polarized electromagnetic wave is strongly scattered by the hanger ropes of a large suspension bridge. Sometimes this causes TV-ghost problems. This TV-ghost problem was theoretically calculated. Then, cylindrical wave absorbers constructed from a combination of dielectric and magnetic material were designed to suppress the scattering. This paper theoretically shows that using this absorber decreases the TV-ghost problem.
Index terms: Suspension bridge, TV-ghost, cylindrical wave absorber.
EMCABS: 08-08-99
A NEW DUAL-COAXIAL-TEM CELL
H.A. Wolfsperger, H. Strehlow and A.J. Schwab e-mail: wolfsperger@ieh.etec.uni-karlsruhe.de
University of Karlsruhe, 76128 Karlsruhe, Germany
Proceedings of 1999 International Symposium on Electromagnetic Compatibility, Tokyo, Japan, May 17-21, 1999, pp.528-531
Abstract: Previously, different configurations of TEM cells, chambers and transmission-line holders were used to determine the intrinsic shielding effectiveness (SE) of materials e.g. conductive plastics. In this contribution, a new dual-coaxial-TEM cell is presented which allows to measure the SE of materials, determine the influence of apertures and test analytical and numerical computation methods. The mechanical and electrical structure is described and the calculation of the electromagnetic coupling is verified by the results of measurements. In addition to the worst-case examination of structures (the electric field is perpendicular to the surface of the test-sample), the dual-coaxial-TEM cell provides a wide frequency range and high dynamic.
Index terms: Shielding effectiveness, dual-coaxial-TEM cell, properties.
EMCABS: 09-08-99
STUDY OF RADIATED EMISSIONS FROM PCB WITH NARROW GROUND PLANE
T.H. Ooi, S.Y. Tan and H. Li, e-mail: ethooi@ntu.edu.sg
Nanyang Technological University, Singapore
Proceedings of 1999 International Symposium on Electromagnetic Compatibility, Tokyo, Japan, May 17-21, 1999, pp.552-555
Abstract: Printed circuit boards (PCB) with narrow ground plane microstrip structure (PCBNGP) find many applications in electronic equipment. In this paper, various PCBNGP with different parameters were fabricated and their radiation was measured. It was found that narrow ground plane increases radiation and common-mode current is the main source of radiation. From the method of moments, it was found that the PCB structure asymmetry is the main source of the common-mode current. By treating the reference point (at infinity) as a conductor, multiconductor transmission line model was developed to simulate radiation from PCBNGP and several factors affecting the radiation were extracted.
Index terms: Printed circuit board, radiated emission, common-mode current, method of moment.
EMCABS: 10-08-99
FDTD MODELING OF EMI ANTENNAS
M. Tanaka, W. Cui, X. Luo, J.L. Drewniak, T.H. Hubing, T.P. VanDoren and R.E.
Dubroff e-mail: tanaka@ipc.akita-u.ac.jp,
University of Missouri-Rolla, Rolla, MO, USA
Proceedings of 1999 International Symposium on Electromagnetic Compatibility, Tokyo, Japan, May 17-21, 1999, pp.560-563
Abstract: The FDTD (Finite-Difference Time-Domain) method is used for modeling EMI antenna geometries to anticipate EMI problems in high-speed digital designs. FDTD is well-suited to modeling large-scale geometries such as cables that might be driven against PCB ground planes as a result of a noise voltage that appears at the connector. Three specific cases are addressed herein including a simple cable driven against a PCB ground, coupling between a high-speed digital and I/O line that drives a cable against the PCB, and the finite impedance of the PCB reference plane that results in an effective noise source that drives the PCB ground against the cable. The FDTD modeling is compared with measurements. Guidelines for coupling to I/O lines, and a keep-out distance around the board periphery for high-speed digital lines can then be developed.
Index terms: Printed circuit board, radiated emission, EMI antenna, FDTD modeling.
EMCABS: 11-08-99
VERTICAL RISER EFFECTS OF A FINITE-LENGTH TRANSMISSION LINE
W. Liu and Y. kami, e-mail: kami@cas.uec.ac.jp
The University of Electro-Communications, Tokyo 182-8585, Japan
Proceedings of 1999 International Symposium on Electromagnetic Compatibility, Tokyo, Japan, May 17-21, 1999, pp.642-645
Abstract: Electromagnetic effects due to vertical risers of a finite-length transmission line are studied on a view point of a circuit concept. Those effects can be taken into account in an expression of modified telegrapher’s equations. From a set of solutions to the equations, a new chain matrix is obtained. As a result of the effects, resonance frequencies are discussed using scattering parameters S21 and S11. The effectiveness of this theory is confirmed by comparison between the measured and the computed.
Index terms: Transmission line, riser effect, circuit concept.
EMCABS: 12-08-99
A STUDY OF CROSSTALK APPLIED TO ULTRA-HIGH-SPEED PARALLEL LOSSY MICROSTRIP AND
STRIP LINES WITH SHIELDING EFFECTIVENESS
S. Malisuwan and V. Ungvichian, e-mail: malisuwa@bocanews.infi.net,
Florida Atlantic University, USA
Proceedings of 1999 International Symposium on Electromagnetic Compatibility, Tokyo, Japan, May 17-21, 1999, pp.742-745
Abstract: Several researchers have reported that in some cases the crosstalk in the lossless ultra-high-speed parallel microstrip transmission lines does not necessary reduce by increasing the spacing in between the two lines. In this study, the substrate loss parameters which are dielectric and conductor are include in the calculation. Furthermore, the influence of a near-by cover plate which provides shielding is also considered. The technique used to calculate the crosstalk is based upon accurate wide-range closed form expressions for the frequency-dependent parameters in conjunction with a linear system theory and Fourier theory. The simulations using Gaussian pulses with different widths as input source have indicated that the crosstalk decreases non-monotonically for certain s/h and pulse-width of less than 20 picoseconds. Also the crosstalk can be reduced further by using a cover plate mounted sufficiently close to the transmission lines.
Index terms: Crosstalk, microstrip transmission line, substrate loss, simulation.