EMCABS
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EMCABS |
Following are abstracts of papers from previous EMC symposia, related conferences,
meetings and publications.EMCAB COMMITTEEBob Hunter, Consultant “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 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, 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: 01-8-2002
CROSSTALK EFFECTS FROM A CASCADED LINE WITH DIFFERENT HEIGHTS TO A TRANSMISSION
LINE
Weikun Liu and Yoshio Kami
University of Electro-Communications, Tokyo 185-8282, Japan
liu@ice.uec.ac.jp
Proceedings of 3rd International Symposium on EMC, Beijing, China, May 21-24,
2002, pp. 91-94.
Abstract: Crosstalk or coupling characteristics between a cascaded line
with an abrupt step on the way and a straight transmission line of finite length
are discussed comparing measured and calculated results. To analyze the coupling
phenomenon, a modified telegrapher's equation including the effects of external
fields to the lines system is derived. The fields can be obtained by estimating
vector potentials of currents in the line and the terminal sections, where the
terminals are fabricated like a configuration as "via". A four-port
network expression on voltages and currents at each terminal is obtained from
solutions of the equation. Some experiments have been done to appraise the utility
of the theory used here by comparing transmission characteristics.
Index terms: Transmission line, cascaded line with different heights,
crosstalk effects, modified telegrapher's equation, experiment.
EMCABS: 02-8-2002
ANALYSIS DESIGN AND APPLICATION OF SPHERE LOADED MONOPOLE ANTENNA
Qin Chunlan, Jin Xianglan and Gao Yougang
Department of Telegraphic Engineering, Beijing University of Post and Telecommunication,
Beijing 100876, China
Proceedings of 3rd International Symposium on EMC, Beijing, China, May 21-24,
2002, pp. 131-134.
Abstract: This paper analyzed and studied the king of configurations
of a rotationally symmetric monopole antenna by applying the extended moment
method. Its terminal uses a sphere-loaded technique. The optimum angle of a
cone is obtained and the curve of the low-cut frequency versus height has been
discussed. A sphere load antenna is designed and fabricated for impulse radar.
All are analyzed by the extended moment method. Theoretical calculation and
partial experimental results are compared and reasonable agreement is obtained.
The research provides the theoretical basis for practical design.
Index terms: Broadband antenna, sphere loaded monopole, moment method,
cone angle.
EMCABS: 03-8-2002
MEASUREMENT OF THE ELECTROMAGNETIC CONSTANTS OF CONCRETE MATERIALS BY TIME-DOMAIN
REFLECTOMETRY
Xu Qiwei Shi Lihua and Gao Cheng
EMP Lab, Nanjing Engineering Institute, Nanjing, 210007, China
emp.njei@public.ptt.js.cn
Proceedings of 3rd International Symposium on EMC, Beijing, China, May 21-24,
2002, pp. 230-233.
Abstract: A dielectric constant and electrical conductivity measurement
system based on time-domain reflectometry (TDR) probes that can be embedded
into concrete structures have been designed. The calibration data in distilled
water has shown that the measuring system can measure the dielectric constant
and conductivity accurately. By using the embedded probes in concrete structures,
changes of the electromagnetic properties through the curing stage of Portland
concrete specimens are measured and presented in this paper.
Index terms: Concrete materials, electrical parameters, time-domain reflectometry,
three-rod transmission lines, measurement.
EMCABS: 04-8-2002
INNOVATIVE ABSORBING-BOUNDARY CONDITIONS FOR THE EFFICIENT FDTD ANALYSIS OF
TRANSIENT EMP INTERACTION PROBLEMS
Zheng Hongxing
Dept. of Telecommunication Engineering, Civil Aviation University of China,
Tianjin 300300, CHINA
Dept. of Electronic Engineering, City University of Hong Kong, Hong Kong
zhenghongxing@ieee.org
Proceedings of 3rd International Symposium on EMC, Beijing, China, May 21-24,
2002, pp. 238-241.
Abstract: The paper deals with a modified version of Fang-Mei's super-absorption
algorithm for the truncation of three-dimensional finite-difference time-domain
(FDTD) meshes combined with an innovative low pass filtered algorithm to assure
numerical stability of the FDTD procedure for late time. The proposed method
is usually applied to analysis of slow-decaying transient problems, such as
the lightning or nuclear electromagnetic pulse interaction with a cable or complex
structures. Numerical results have demonstrated the efficiency of the proposed
method.
Index terms: Transient analysis, FDTD method, low pass filtered algorithm,
numerical stability.
EMCABS: 05-8-2002
FDTD MODELING OF SKIN EFFECT
Chen Wang+, James L. Drewniak+, Min Li+++, Jun Fan++, James L. Knighten++, Norman
W. Smith+, Ray Alexander++, Jingyu Huang++++
+Department of Electrical and Computer Engineering, University of Missouri –
Rolla
drewniak@ece.umr.edu
++ NCR Corporation, San Diego, CA, USA
+++ Celiant Corp. Warren, NJ, USA
++++ Tsinghua University, P.R. China
Proceedings of 3rd International Symposium on EMC, Beijing, China, May 21-24,
2002, pp. 246-249.
Abstract: The data rates and clock speeds of current
high-speed signals are increasing rapidly; consequently, not only the lossy
nature of FR-4 but also the lossy nature of good conductors, such as copper,
need to be taken into account in high-speed signal designs. In order to well
predict the loss caused by both dielectric loss and skin effect loss, a suitable
simulation tool is needed. A surface impedance boundary condition (SIBC) algorithm
was implemented in FDTD modeling herein to accommodate the skin effect loss
due to finite conductivity of good conductors. Good agreement between the FDTD
result and the measurements as well as the SPICE result was obtained for a 14
mils wide strip line.
Index terms: Simulation tool, FDTD modeling, skin effect loss, surface
impedance boundary condition.
EMCABS: 06-8-2002
FDTD SIMULATION OF THE ELECTRICAL ENVIRONMENT FOR VEHICLES BY USING CAD DATA
Peter Ankarson and Jan Carlsson
SP Swedish National Testing and Research Institute, Box 857, S-501 15 Boras,
Sweden
Proceedings of 3rd International Symposium on EMC, Beijing, China, May 21-24,
2002, pp. 272-275.
Abstract: A method to make a CAD model of a vehicle
suitable for electromagnetic (EM) simulations is presented. Three different
EMC problems have been studied by using the derived CAD models in a Finite Difference
Time Domain (FDTD) program: first, the coupling between antennas mounted on
the vehicle; second, the locations of "hot spots", i.e. places with
high field strength inside the vehicle; and third, the E-field probed in a circle
around the vehicle. The agreement between simulations and measurements performed
in a semi-anechoic chamber was found to be satisfactory.
Index terms: Vehicle, CAD model, electrical environment, FDTD simulation.
EMCABS: 07-8-2002
A TIME-DOMAIN MICROWAVE OVEN NOISE MODEL FOR EVALUATION OF INTERFERED COMMUNICATION
SYSTEM PERFORMANCE
A Time-Domain Microwave Oven Noise Model for Evaluation of Interfered Communication
System Performance
Morio Takeuchi+, Yasushi Matsumoto+, Akira Sugiura+, and Yukio Yamanaka++
+Tohoku University Research Institute of Electrical Communication 2-1-1, Katahira,
Aoba-Ku Sendai, 980-8577, Japan
ymatsu@riec.tohoku.ac.jp
++ Communications Research Laboratory Yokosuka Radio Communications Research
Center 3-4 Hikarinooka, Yokosuka, Kanagawa, 239-0847, Japan
Proceedings of 3rd International Symposium on EMC, Beijing, China, May 21-24,
2002, pp. 517-519.
Abstract: For analyzing the interference in a radio communication system
caused by a microwave oven, a time-domain noise model is newly developed taking
into account the noise generation mechanism. It is a very simple model made
of an FM/AM modulator. Comparison between an actual noise and the proposed model
in the waveforms and spectra clearly demonstrates the usefulness of the proposed
model.
Index terms: Communication system, interference, microwave oven, time-domain
noise model.
EMCABS: 08-8-2002
PREPARATION OF MODIFIED TEXTILE POSSESSED OF ABSORBING AND SHIELDING
CHARACTERIZATIONS
Wang Qun, Zhang Xiaoning, Mao Qianjin, Ge Kaiyong, and Zhou Meiling
Key Laboratory of Advanced Functional Materials, Ministry of Education, School
of Material Science and Engineering, Beijing Polytechnic University, Beijing,
100022, China
bpujohnson@yahoo.com
Proceedings of 3rd International Symposium on EMC, Beijing, China, May 21-24,
2002, pp. 589-594.
Abstract: The electromagnetic wave theory of Schelkunoff has been studied.
The condition of energetics and the reaction mechanism on depositing Ni-P alloy
are investigated. Moreover, the modified textile possessed of the duplex characterization
of absorbing and shielding effectiveness property is prepared by electro-less
coating. By analyzing three kinds of modified textile both in respect to microscopy
and characterizations testing, the preparation conditions of the multifunctional
and modified textile are put forward. The mol ratio of Ni2+ to H2PO2- in the
electro-less Ni-P alloy coating solution directly influences the phosphorous
proportion in the modified layer of textile. Three frequency bands are studied
in this paper: 30MHz ~ 1000MHz for SE, 12G ~ 18GHz and 100K ~ 1.5GHz for AE.
The maximum of corresponding results are Ð80dB (SE) at 265MHz, -24.67dB (AE)
at 15.2GHz and Ð12.28dB (AE) at 435.1MHz, respectively.
Index terms: Absorbing materials, shielding materials, textile, electro-less
coating.
EMCABS: 09-8-2002
FDTD SIMULATION OF THE SHIELDING EFFECTIVENESS OF METAL-COATING PLASTICS FOR
INFORMATION TERMINALS
Tetsuji Tsuchikawa, Jianqing Wang, and Osamu Fujiwara
Faculty of Engineering, Nagoya Institute of Technology, Nagoya 466-8555, Japan
wang@odin.elcom.nitech.ac.jp
Proceedings of 3rd International Symposium on EMC, Beijing, China, May 21-24,
2002, pp. 595-598.
Abstract: Metal-coating plastics are being used as shielding materials
for electronic and information terminals due to their light weight. In this
paper, a finite-difference time-domain (FDTD) algorithm was newly proposed for
analyzing the shielding effectiveness of metal-coating plastics in a broad frequency
band. The method was based on the derivation of a time-domain representation
of the surface resistance of an equivalent resistive film. The validity of the
proposed algorithm, for both far-field and near-field shielding, was verified
by comparing the calculated results with theoretical ones. Good agreement was
found between them when the size of the shielding material was sufficiently
large compared to the wavelength.
Index terms: Metal-coating plastics, shielding effectiveness, equivalent
resistive film, FDTD algorithm.
EMCABS: 10-8-2002
A NOVEL MODEL OF CROSSTALK IN ULTRA-HIGH-FREQUENCY MICROSTRIP TRANSMISSION
LINES
Sarunwitch Supaprasert+, Ut Goenchanart+, Settapong Malisuwan++, and Vichate
Ungvichian+++
+MET Program, Rangsit University Bangkok, Thailand
++Department of Electrical Engineering Chulachomklao Royal Military Academy
Nakhon-Nayok, Thailand
+++Professor and Director, EMI R&D LAB, Florida Atlantic University, FL33431,
USA
Proceedings of 3rd International Symposium on EMC, Beijing, China, May 21-24,
2002, pp. 630-633.
Abstract: In this paper, a novel model of crosstalk in ultra-high-frequency
micro-strip transmission lines is proposed. Analogous to dielectric relaxation
considerations of Cole-Cole diagrams as applied to dielectric materials, a "reactive
relaxation" concept is introduced to represent the frequency-dependent
characteristics of coupled micro-strip lines. Relevant algorithms are shown
to be useful in computer-aided circuit designs.
Index terms: Ultra-high-frequency micro-strip transmission lines, crosstalk
model, reactive relaxation concept.
EMCABS: 11-8-2002
CROSSTALK PREDICTION IN TWISTED BUNDLES BY A NEURAL APPROACH
B. Cannas+, A. Fanni+, and F. Maradei++
+Department of Electrical and Electronic Engineering, University of Cagliari,
Piazza d'Armi, 09123 Cagliari, Italy
fanni@diee.unica.it
++Dept. of Electrical Engineering, University of Rome "La Sapienza",
Via Eudossiana 18, 00184 Rome, Italy
maradei@elettrica.ing.uniromal.it
Proceedings of 3rd International Symposium on EMC, Beijing, China, May 21-24,
2002, pp. 638-641.
Abstract: A neural network based procedure is proposed for the crosstalk
prediction in twisted bundles. The non-uniform bundle is approximated as a cascade
of uniform sections and the neural network is suitably trained with few cross
section configurations to learn the behavior of the per unit length parameters.
The procedure allows a fast and accurate prediction tool.
Index terms: Non-uniform twisted bundles, crosstalk, prediction tool,
neural network approach.
EMCABS: 12-8-2002
HEATSINK GROUNDING EFFECT ON THE RADIATED EMISSION OF AN ELECTRONIC DEVICE
Li Rong, and Zhang Lin-Chang
EMC Research Section, Northern Jiaotong University, Beijing 100044, China
Proceedings of 3rd International Symposium on EMC, Beijing, China, May 21-24,
2002, pp.704-709.
Abstract: Heat sink is an indispensable component in an electronic device.
However, containing emission from heat sink is rapidly becoming a necessity
caused by higher power levels and faster clocking digital circuits. It affects
the sensitive circuit. In this paper, some grounding schemes of heat sink are
presented and calculated applying the FDTD method. It is shown that different
grounding points affect the electromagnetic characteristics of heat sink differently,
and more grounding points don't necessarily result in the improvement of electromagnetic
characteristics. Considering four grounding points, four edge centered ground
points are selected for little electromagnetic field.
Index terms: Heat sink, radiated emission, FDTD method, grounding effect.
EMC
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