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Predecessor
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Displaying 1-16 of 16 articles from this issue
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Article type: Cover
Pages Cover1-
Published: March 16, 1999
Released on J-STAGE: June 23, 2017
CONFERENCE PROCEEDINGS FREE ACCESSDownload PDF (12K) -
Article type: Index
Pages Toc1-
Published: March 16, 1999
Released on J-STAGE: June 23, 2017
CONFERENCE PROCEEDINGS FREE ACCESSDownload PDF (62K) -
Kunimitsu Sugiura, Shuichi Nitta, Atsuo MutohArticle type: Article
Session ID: ROFT99-41
Published: March 16, 1999
Released on J-STAGE: June 23, 2017
CONFERENCE PROCEEDINGS FREE ACCESSResponse of switching regulator to incident conductive noise is experimentally clarified. It is concluded that switching regulator can suppress incident conductive noise in the frequency range below switching frequency varying with load and input voltage, but can't suppress incident conductive noise over switching frequency.View full abstractDownload PDF (630K) -
Shiro YOSHIDA, Hirokazu TOHYAArticle type: Article
Session ID: ROFT99-42
Published: March 16, 1999
Released on J-STAGE: June 23, 2017
CONFERENCE PROCEEDINGS FREE ACCESSThis paper describes a novel decoupling circuit comprising magnetic materials and built-in choking coils which makes it possible to significantly suppress noise and improve noise immunity in a digital printed circuit board(PCB).View full abstractDownload PDF (709K) -
Hitoshi IRINO, Hiroshi WABUKA, Hirokazu TOHYAArticle type: Article
Session ID: ROFT99-43
Published: March 16, 1999
Released on J-STAGE: June 23, 2017
CONFERENCE PROCEEDINGS FREE ACCESSA current in a printed circuit board(PCB)power supply line contains radio frequency(RF)currents corresponding to all internal LSI circuit currents. Then, it is necessary for estimating the power supply current to use an appropriate model for LSI power supply terminals. In this report, a new LSI model for the power power supply terminal is proposed, which is a component whose resistance varies with time. Current in the power supply line of a PCB was well simulated by using the model. The maximum deviation between simulated values of current spectra and the measured in experiments was found to be within 10dB in the range of 1MHz to 1GHz.View full abstractDownload PDF (588K) -
Noriaki ANDO, Hirokazu TOHYAArticle type: Article
Session ID: ROFT99-44
Published: March 16, 1999
Released on J-STAGE: June 23, 2017
CONFERENCE PROCEEDINGS FREE ACCESSThis paper suggests a new circuit model which represents a equivalent circuit of CMOS-LSI at power supply terminal using an high frequency voltage source with a relatively high internal impedance. AC analysis of decoupling circuits was made using this new CMOS-LSI model at power supply. By this new model we can analyze the whole decoupling circuit system including both AC circuits and transmission lines.View full abstractDownload PDF (482K) -
Tsugio Sakamoto, Masaru Chino, Takashi Yamamoto, Ario Yamamoto, Masaki ...Article type: Article
Session ID: ROFT99-45
Published: March 16, 1999
Released on J-STAGE: June 23, 2017
CONFERENCE PROCEEDINGS FREE ACCESSIn this report, firstly, we propose the evaluation method of electromagnetic absorptive characteristics by reflection loss and phase angle measurement using the coaxial line. Secondly, we obtain the material constant with perfect matching condition(_<εr>^*=_<μr>^*)in Fe/Ti composite material. Thirdly, we simulate the perfect matching condition.View full abstractDownload PDF (787K) -
Hideyuki Nasu, Kiyoyuki Isawa, Tomomichi Matsunaga, Hideyuki OmuraArticle type: Article
Session ID: ROFT99-46
Published: March 16, 1999
Released on J-STAGE: June 23, 2017
CONFERENCE PROCEEDINGS FREE ACCESSWe characterized transmission of a SCM system using optical repeaters with frequency-block conversion to realize cost-effectiveness by the use of standardized transmission equipment and reduction of preparation for lasing wavelength selection of light sources, and to increase transmission length and number of terminals. This system is especially useful to collect video signals from multiple points. In order to characterize transmission perfomance, CNR effected by optical beat interference derived from simultaneously detecting multiple optical signals transmitted from teminals and an optical repeater, and moreover composite distortions generated at a light source and a receiver in an optical repeater were examined. To practically evaluate this characterization, a SCM system having 2 optical repeaters with frequency block-conversion was set up. We confirmed that characterized CNR and composite distortions have a good agreement with measured results. As we certified validity of system characterization, we derived limits of transmission length, number of teminals and number of optical repeats by evaluating CNR and composite distortions. We also demonstrate those results.View full abstractDownload PDF (829K) -
Kazuhiro OHTA, Toshikazu NEZU, Shuya HOSOKAWA, Shinichiro OHMI, Hirosh ...Article type: Article
Session ID: ROFT99-47
Published: March 16, 1999
Released on J-STAGE: June 23, 2017
CONFERENCE PROCEEDINGS FREE ACCESSIngress noise is generally known to degrade up-link signals in CATV network. In particular, ingress noise in the frequency band lower than 20MHz disturbs seriously the data communication. In this paper, at first, we analyze the ingress noises in the actual CATV networks. Based on the measurement result above, we introduce the up-link access method, which uses multi-carrier frequency hopping mechanism. Then we show a potential of communication in low frequency bandwidth by means of the test result in an actual CATV network with the cable modem system that uses the access method.View full abstractDownload PDF (741K) -
Hiroyuki HAMAZUMI, Koichiro IMAMURA, Naohiko IAI, Kazuhiko SHIBUYAArticle type: Article
Session ID: ROFT99-48
Published: March 16, 1999
Released on J-STAGE: June 23, 2017
CONFERENCE PROCEEDINGS FREE ACCESSIn a low cost relay station for SFN(Single Frequency Networks)of digital terrestrial broadcasting, the coupling effect from transmitting antenna to receiving antenna should be reduced to avoid distortion and oscillation problem. In this paper, a simple booster system without decision and re-modulation technology is focused. For OFDM(Orthogonal Frequency Division Multiplexing)system, we propose a coupled wave canceling system using adaptive signal processing with small process delay time. The proposal system use adaptive FIR filter to cancel, which is controlled by transfer function determined from scattered pilot symbols obtained broadcast wave. The usefulness of the proposed system has been verified by the computer simulations.View full abstractDownload PDF (736K) -
Katsuo ISHIHARA, Masamitsu TOKUDArticle type: Article
Session ID: ROFT99-49
Published: March 16, 1999
Released on J-STAGE: June 23, 2017
CONFERENCE PROCEEDINGS FREE ACCESSWe have developed PW(Parallel Wired)cell which has many parallel wire as inner and outer conductor. It is revealed that VSWR is below almost 1.5 and input impedance is about 50 ohm from 300 kHz to 3 GHz. By using the PW cell, radiated emission test and radiated radio frequency electromagnetic field immunity test for electrical equipment can be performed in a performance examination at the design stage of the equipment and a product control examination at mass-production process.View full abstractDownload PDF (732K) -
Toshio TSUNO, Teruhusa KUNISADAArticle type: Article
Session ID: ROFT99-50
Published: March 16, 1999
Released on J-STAGE: June 23, 2017
CONFERENCE PROCEEDINGS FREE ACCESSTransparent conductive films are used to the energy saving windowpane for the excellent solar enagy reflection characteristic. Radio waves are almost reflected by such high conductive filmes and cause radio interferences sometimes. Dividing a conductive film we can control the reflection. Modelling of the separated stripe-like films to ultra thin ellipse poles and using the method of image, we calculate the transmitance and reflectance. We studied the relation between the transmission characteristics and each parameter of the separated films. The characteristic in frequency is mainly controlled by the width of the film and the dielectric constant of the substrate. The sheet glass of sevral mm in thickness with a divided film of 1 cm in width, transmits radio waves up to about 1 GHz.View full abstractDownload PDF (855K) -
Masanobu BanArticle type: Article
Session ID: ROFT99-51
Published: March 16, 1999
Released on J-STAGE: June 23, 2017
CONFERENCE PROCEEDINGS FREE ACCESSSince the discovery of 1/f noise generated from cathode rays by Johnson, several 1/f noises have been found in physical phenomena. So I try to make clear this phenomena by Shrodinger wave equation. When Shrodinger wave equation is applied to solve about time, in case of 1/f noise observed, a sin integral function was found in a solution of energy. And finally as the solution of equation, a rectangle wave, which stood alone was got. The example which showed a characteristic of isolated rectangle wave is found.View full abstractDownload PDF (596K) -
Hideki KANEMOTO, Shinichi MIYAMOTO, Norihiko MORINAGAArticle type: Article
Session ID: ROFT99-52
Published: March 16, 1999
Released on J-STAGE: June 23, 2017
CONFERENCE PROCEEDINGS FREE ACCESSIn order to improve true error rate performance under radio frequency man-made noise enviroment, optimum reception based on the statistical characteristics of man-made noise has been proposed. In this optimum reception, the statistical characteristics of mam-made noise have to be estimated in advance. In this paper, we employ Middleton's class-A impulsive noise model as a statistical model of man-made noise, and discuss the parameter estimation of class-A model and the performance of optimum receiver constructed with estimated parameters. Numerical results show that, although the enormous amount of noise sample is required to obtain precise estimated parameters, a good error performance of optimum receiver can be obtained with parameters estimated by a certain amount of noise sample.View full abstractDownload PDF (906K) -
Yukio HOTTA, Isyu KAN, Shuichi NITTAArticle type: Article
Session ID: ROFT99-53
Published: March 16, 1999
Released on J-STAGE: June 23, 2017
CONFERENCE PROCEEDINGS FREE ACCESSWith the population of electronic equipments, many digital and analog apparatuses are being installed closely in the same space and the same equipment. In the installation environment mentioned in the above, mutual electromagnetic interference between equipments become severe problems. In this study, the influences of shielding material, magnetic material and dielectric material on electromagnetic field closed to these materials are quantitatively discussed as first step to enable electromagnetic field control inside the equipments.View full abstractDownload PDF (1526K) -
Article type: Appendix
Pages App1-
Published: March 16, 1999
Released on J-STAGE: June 23, 2017
CONFERENCE PROCEEDINGS FREE ACCESSDownload PDF (64K)
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