EMCABS

WILLIAM H. McGINNIS ASSOCIATE EDITOR

Following 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

“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, 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.

DEMONSTRATION OF THE ACTIVE INTEGRATED AMP ANTENNA
FOR MICROWAVE POWER TRANSMISSION

Yoshiharu Kido, Hidehisa Shiomi, Yoshihiro Naruo,
Susumu Sasaki, Nobuhito Nagatomo, Tadashi Takano,
and Shigeo Kawasaki

EMC-Japan meeting at Akita University, Akita

October 27, 1997, EMCJ97-71

Abstract: In this report, design, fabrication and experimental results of active integrated antenna arrays for microwave power transmission in the space solar power satellite system were described. An active integrated antenna and a two-element antenna array in a multi-layered fashion with an amplifier and a patch antenna were made. Then, from these results, the fundamental functions of these antennas such as amplification or antenna pattern were confirmed.

Index terms: Solar power satellite, microwave power transmission, active integrated antenna.

AN EXPERIMENTAL STUDY ON THE WAVE ABSORBER
USING EPOXY-URETHANE RUBBERS MIXED WITH
CARBON PARTICLES AT 60 GHz FREQUENCY BAND

Osamu Hashimoto, Noriko Yoshioka,
Kaori Nakamura, and Tetu Sou
EMC-Japan meeting at Akita University, Akita

October 27, 1997, EMCJ97-73

Abstract: As the practical use of the Automobile Collision Warning System, it is required that the wave absorber for proof of environment at 60 GHz frequency band, which is fitted up with guardrails, protects the Radar system from an interference due to unnecessary wave reflection. In this paper, we pay our attention to epoxy-modify urethane rubbers which has been studied at 60 GHz frequency band. In realizing this type wave absorber, at first we tried to measure the more precise complex permittivity of this material using the absolute value of reflection coefficient. As the result of this measurement, we present the new design chart, and high efficient wave absorber is realized using this material.

Index terms: mm-wave absorber, 60GHz frequency band, epoxy-modify urethane rubbers

PERFORMANCE OF TDMA RADIO COMMUNICATION SYSTEM WITH BCH CODING UNDER MAN-MADE NOISE ENVIRONMENT

Kenichi Mizugaki, Shinichi Miyanoto, and Norihiko Morinaga
EMC-Japan meeting at Science University of Tokyo, Tokyo

November 26, 1997, EMCJ97-74

Abstract: It was already reported that the noise emitted from microwave oven significantly degrades the performance of digital radio communication system. In this paper, in order to obtain a good error performance under microwave oven noise environment, we employ the BCH error correction coding scheme and investigate the performance improvement achieved by BCH codes. Numerical results conclude that, by applying BCH coding and bit interleaving schemes, the performance of digital radio communication system can be greatly improved. Moreover, we also take a frame structure of TDMA-TDD into account and discuss the interleaving method which achieves much performance improvement with short decoding delay.

Index terms: Microwave oven noise, error correction coding, interleaving, 9/4-shift QDPSK, TDMA-TDD

PROPOSAL OF RADIATED IMMUNITY TEST METHOD USING ELECTROMAGNETIC FIELDS OF LOW SPEED ROTATION

Kimitoshi Murano, and Yoshio Kami
EMC-Japan meeting at Science University of Tokyo, Tokyo

November 26, 1997, EMCJ97-75

Abstract: A new method of radiated immunity test applying electromagnetic fields of low speed rotation is described. The main purpose of this method is to find out the weak points of equipment under test for radiated immunity. Two different double-sideband waves are indispensable for the generation of rotating electromagnetic fields. To generate those waves accurately, a new technique using a delay line instead of a balanced modulator is proposed. Experimental confirmation of basic properties are made for a prototype of orthogonal loop antennas.

Index terms: Radiated immunity test method, electromagnetic fields of rotation, double-sideband wave, orthogonal loop antennas

ABSORBED POWER AND RADIATION POWER IN TWO DIMENSIONAL LOSSY CYLINDRICAL MODEL

Kazuyoshi Uchida, Takashi Nakamura, and Shinobu Tokumaru
EMC-Japan meeting at Science University of Tokyo, Tokyo

November 26, 1997, EMCJ97-81

Abstract: Portable telephones were spread remarkably in recent years, while biological effects upon human bodies by the electromagnetic wave were feared. In this paper, a portable telephone system having two antennas were proposed to reduce the SAR in the human body. As the simplest model of the portable telephone and human head mode., two dimensional lossy dielectric cylindrical human head model near with two line currents sources are analyzed. As an example, it was shown that total SAR decreases about ten percents in the case of one line source and peak SAR decreases about a quarter of the case with one line source.

Index terms: Cylindrical human head model, SAR, electromagnetic biological effect, portable telephone, lossy dielectric cylinder

CHARACTERISTIC COMPUTATION OF TEMPERATURE-RISE INSIDEREALISTIC HEAD MODEL FOR 1.5GHz MICROWAVE FAR-FIELD EXPOSURE

Masaaki Yano, Jianqing Wang, and Osamu Fujiwara
EMC-Japan meeting at Toyohashi University of Technology, Aichi

December 15, 1997, EMCJ97-85

Abstract: This paper describes the temperature-rise distribution inside two different realistic head models simulating the adult and infant for 1.5 GHz microwave far-field exposure, which has the safety level (1 mW / cm2) specified in an uncontrolled environment. The FD-TD (finite-difference time-domain) method was used to analyze both the SAR ( specific absorption rate) and the temperature-rise. The ambient temperature and the distribution of a non-uniform temperature inside the head before the microwave exposure were considered. As a result, we found that the peak temperature-rise is somewhat lower for the infant in comparison with the adult and the peak temperature-rises in the both models are around 0.07 degrees centigrade. We also found that for the infant the temperature-rise averaged in each tissue except the eyeball is larger and the averaged temperature-rise in the brain is nearly three times larger. The latter finding is based on the fact that a localized hot spot appears inside the infant.
Index terms: Microwave, localized SAR, biological effects, realistic head model, temperature-rise

BRAIN-EQUIVALENT SOLID PHANTOM AND ITS APPLICATION TO SAR ESTIMATION BY THERMOGRAPHIC METHOD

Assiniboia Achene, At sushi Haze, and Koichi Ito
EMC-Japan meeting at Toyohashi University of Technology, Aichi

December 15, 1997, EMCJ97-86

Abstract: A lot of phantoms have been proposed as the human head model for experimental estimation of the interaction between the human head and electromagnetic fields around. In this paper, a solid phantom is introduced as the human head model realizing the same relative dielectric constant and conductivity as brain tissue. This brain-equivalent solid phantom makes it possible to accomplish highly reliable and precise estimation of specific absorption rate (SAR) in biological tissue. Brain-equivalent solid phantom models of cubes and spheres are fabricated. Measurements are performed to estimate SAR in the human head modes exposed to microwave sources by using the thermographic method.

Index terms: Brain-equivalent solid phantom, SAR, thermographic method, infrared emission

THE INFLUENCE OF BUILDINGS ON MOBILE RADIO WAVES PROPAGATION IN AN URBAN AREA

Paul Selormey, and Yasumitsu Miyazaki
EMC-Japan meeting at Toyohashi University of Technology, Aichi

December 15, 1997, EMCJ97-89

Abstract: Detailed characterization of radio propagation channel is a major requirement for successful design of mobile communication systems. In this paper , mobile radio channel characterization process based on the FDTD method is presented. The merits and demerits of the currently used methods, namely impulse-response method and ray-tracing methods are briefly discussed. The total field formulation of the FDTD method is discussed. The simulation model consists of a main street with six concrete buildings. The wave propagation patterns in the whole channel and the received signals at some line of sight and out of sight locations are presented.

Index terms: FDTD method, propagation characteristics, wave scattering, mobile radio waves

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