ITE Technical Report
Online ISSN : 2424-1970
Print ISSN : 1342-6893
ISSN-L : 1342-6893
33.15
Showing 1-17 articles out of 17 articles from the selected issue
  • Type: Cover
    Pages Cover1-
    Published: March 13, 2009
    Released: September 20, 2017
    CONFERENCE PROCEEDINGS FREE ACCESS
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  • Type: Index
    Pages Toc1-
    Published: March 13, 2009
    Released: September 20, 2017
    CONFERENCE PROCEEDINGS FREE ACCESS
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  • Toshihide TOSAKA, Yukio YAMANAKA, Katsumi FUJII, Tsutomu SUGIYAMA
    Type: Article
    Session ID: BCT2009-43
    Published: March 13, 2009
    Released: September 20, 2017
    CONFERENCE PROCEEDINGS FREE ACCESS
    To evaluate uncertainty in electromagnetic interference (EMI) measurement in the 1-18GHz range, a round robin test was conducted at 13 measurement sites. The maximum data spread of the measured field strength of equipment under test (EUT) that mainly radiates vertical components was 5.0dB for both the peak and average detector in the case of vertical polarization. The maximum data spread increased to as much as 14.5dB in the case of horizontal polarization. It was found that the spread of the measurement was mainly affected by site imperfections (SVSWR), the material of the setup table, and receiver characteristics. Finally, the validity of the uncertainty budget sheet being developed by CISPR was discussed.
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  • Masahiro KITAGAWA
    Type: Article
    Session ID: BCT2009-44
    Published: March 13, 2009
    Released: September 20, 2017
    CONFERENCE PROCEEDINGS FREE ACCESS
    The radiated emission due to the in-house broadband power-line communications (PLC) is caused by the common-mode (CM) currents on the power-line network. There are two origins of the CM currents; The one is caused by the unbalance of the PLC modem itself and injected from the modem to the outlet. The other is converted from the DM signal current at the unbalanced elements on the power-line network. Japanese PLC regulation ristricts the CM current measured using the impedance stabilization network (ISN) with the DM impedance of 100ohm, CM impedance of 25ohm, and the longitudinal conversion loss (LCL) of 16dB, which is determined from the LCL measured at the outlets and intended to emulate the in-house power-linen network. However, the PLC modems which are type-approved under the regulation and avaiable in the market cause the radiated emission more than 20dB larger than intended. The direct cause of the excessive emission is the excessive DM signal of the PLC modems. Why the CM current measurement using the ISN allows the excessive DM signal is clarified.
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  • Eiji MURAKUNI, Naoya HIGAKI, Kenji SHIBA
    Type: Article
    Session ID: BCT2009-45
    Published: March 13, 2009
    Released: September 20, 2017
    CONFERENCE PROCEEDINGS FREE ACCESS
    It is necessary for an implantable medical device to transmit information between the internal and the external organs of a human body. When using a high-frequency (MHz-GHz) communication band, we need to clarify how the internal organs influence the attenuation of an electromagnetic wave. In this study, we develop a model that includes 18 types of biological tissues by referring to the numerical human body model of NICT. Further, we analyze the electric field distribution of the human body in the practical environment of these devices (for example, artificial heart, wireless capsule endoscopes, etc.) by using an electromagnetic simulator (Micro Stripes) that employs a Transmission-Line Modeling method. We examine the human body electromagnetic wave penetration characteristics of every frequency band and the safety of using the communication electric wave.
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  • Ryosuke YANAGISAWA, Yoshiki KAYANO, Hiroshi INOUE
    Type: Article
    Session ID: BCT2009-46
    Published: March 13, 2009
    Released: September 20, 2017
    CONFERENCE PROCEEDINGS FREE ACCESS
    In recent years, anomalous electromagnetic responses such as antiparallel phase and group velocities (back-ward propagation) or negative group time delay have been focused, and are wanted to see novel microwave concept and signal processing devices. In this paper, the Folded-Stepped Impedance Resonator (F-SIR) structure, which is small, low loss and easy to make, is proposed as a new and good candidate for left-handed transmission line (LH-TL) characteristic in the integrated circuit (IC). At first stage, a planar multistage periodical F-SIR structure is designed on the printed circuit board (PCB). Basic experimental and theoretical approaches for the breakthrough to apply the left-handed transmission line (LH-TL) characteristic designed are demonstrated. It is shown that the proposed planar F-SIR structure on PCB has negative propagation constant β, which characterize left-handed, experimentally and theoretically with FEM and equivalent circuit model. And second stage, 10 periodic stage F-SIR in the IC was designed in an 4.8mm square IC, and the LH-TL characteristics was measured experimentally.
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  • Takahiro HAMAGAMI, Yoshitaka TOYOTA, Kengo IOKIBE, Ryuji KOGA
    Type: Article
    Session ID: BCT2009-47
    Published: March 13, 2009
    Released: September 20, 2017
    CONFERENCE PROCEEDINGS FREE ACCESS
    A fast algorithm based on a full cavity-mode resonator model of rectangular power-bus structures is able to quickly obtain the power-bus resonance characteristics in multilayer printed circuit boards (PCBs). Furthermore, the approach can provide the resonance characteristics in PCBs with a slit using a slit model expressing electromagnetic coupling across the gap of the slit. However, the model does not express the slit width, which can cause the degradation in accuracy of resonance analysis. In this paper, a slit segment was studied to express the gap of the single slit coupling and analyze the power-bus resonances. The slit segment was given from an equivalent circuit based on a coupled microstrip line. As a result, it was found that the slit segment can provide the power-bus resonance characteristics as accurate as or more accurate than the conventional slit model.
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  • Shoichi KOBAYASHI, Hideki TORIZUKA, Masahiro YAMAGUCHI
    Type: Article
    Session ID: BCT2009-48
    Published: March 13, 2009
    Released: September 20, 2017
    CONFERENCE PROCEEDINGS FREE ACCESS
    We measured RF magnetic near field of analogue power lines for a source driver chip used in liquid crystal-TV display panel after the TV set was opened. The analogue power line was identified as the major source of RF magnetic field noise. A planar shielded loop coil was used to measure the induced voltage waveform. Then RF current waveform was obtained from the voltage waveform by time integration based on the Faraday's low. The estimated waveform was a pulse with peak current of 90mA, time width of 1μs, and corresponding electric charge of 139nC. Supposing the obtained current charges the liquid crystal cells, it is in the same order as the charge of 323nC calculated by designed value. A guideline of EMC co-design can be obtained in future by comparing the measured and the simulated current waveforms.
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  • Hideki TORIZUKA, Masahiro YAMAGUCHI, Takeshi SUGAWARA, Naofumi HOMMA, ...
    Type: Article
    Session ID: BCT2009-49
    Published: March 13, 2009
    Released: September 20, 2017
    CONFERENCE PROCEEDINGS FREE ACCESS
    Increasingly a side channel attack which is to break a cryptographic key using the electromagnetic radiation and power consumption from the cryptographic module regard as a dangerous. In this paper, the magnetic near field of cryptographic LSI was measured using the on-chip integrated micro magnetic field probe with a shielded-loop coil. As a result, the high frequency current in cryptographic LSI was able to be shown as a distribution map. Moreover, when the cryptographic key was estimated by differential electromagnetic analysis, the time of the key presumption is earlier than a place away from the cryptographic IP core, and it has been found that the vulnerability of the cryptographic LSI is seen on the core. It was confirmed that the magnetic near field was able to be suppressed by putting a magnetic film on the cryptographic LSI, and it became a means to protect cryptographic LSI from side channel attack.
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  • Ryo Mochizuki, Tatsuya Fukushima, Hiroaki Iwabuchi, Yoshio Yamada, Tak ...
    Type: Article
    Session ID: BCT2009-50
    Published: March 13, 2009
    Released: September 20, 2017
    CONFERENCE PROCEEDINGS FREE ACCESS
    In this paper, we present a solid state power amplifier (SSPA) for Ku-band applications. This is the first report of SSPA using with gallium nitride (GaN) field effect transistors (FETs), which output power exceeds 50W as world commercial record for Ku-band. We apply a linearization technique to GaN FETs' power amplifiers for the purpose of improving a linearity of RF module. The intermodulation distortion is under -25dBc with 50dBm output power at -10C to +45C. The SSPA controls RF gain stability with a temperature compensator for FETs which connected with 12 steps straightly.
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  • Tomoaki TAKEUCHI, Kazuhiko SHIBUYA
    Type: Article
    Session ID: BCT2009-51
    Published: March 13, 2009
    Released: September 20, 2017
    CONFERENCE PROCEEDINGS FREE ACCESS
    As a number of digital terrestrial broadcasting stations have constructed and started to transmit broadcasting wave, it becomes a serious problem of reception errors in spite of high receiving power. Although we had developed a interference canceller for broadcast-wave relay stations, an adaptive array is desirable to be more simple, robust and more computationally efficient as a receiver for the service area. In this report, we introduce the MMSE adaptive array for fixed reception of ISDB-T. The proposed algorithm uses time domain pre-FFT combiner and the frequency domain post-FFT one-tap equalizer. To optimize the weights for time domain combiner, we use the re-modulated time domain signals with channel distortion as a reference signal. Simulation results show the robustness against the severe receiving environment of the proposed scheme.
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  • Takayuki NAKAGAWA, Kazuhiko MITSUYAMA, Kohei KAMBARA, Tetsuomi IKEDA
    Type: Article
    Session ID: BCT2009-52
    Published: March 13, 2009
    Released: September 20, 2017
    CONFERENCE PROCEEDINGS FREE ACCESS
    The authors have been developing an advanced FPU (Field Pick-up Unit) transmission system exploiting AVC/H.264 video coding, MIMO-OFDM transmission scheme, adaptive array antenna technique, and LDPC (Low-Density Parity-Check) error correction code. As for the MIMO transmission scheme, space-time trellis code (STTC) is being studied. A proposed 2x2 STTC-MIMO-OFDM system was evaluated by using a channel simulator, and the performance was quantitatively analyzed. An outdoor transmission experiment was carried out in the 800MHz-band to measure transmission performance of the 2x2 STTC-MIMO-OFDM system in urban area. As a result, superior performance of the system was confirmed both in the simulation and the experiment.
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  • Shinichi SUZUKI, Takayuki NAKAGAWA, Tetsuomi IKEDA, Fumiyasu SUGINOSHI ...
    Type: Article
    Session ID: BCT2009-53
    Published: March 13, 2009
    Released: September 20, 2017
    CONFERENCE PROCEEDINGS FREE ACCESS
    A TV-studio-use wireless HDTV camera, which is called "a millimeter-wave mobile camera", is being developed. In this development, High-Definition TV picture transmission with high quality, low latency and high link reliability is required. This time, Millimeter-wave Mobile Camera which can transmit High-Definition TV picture within 1 frame (33msecs) latency was developed and used on 59^<th> NHK Red and White Year-end Song Festival which was held in NHK hall on December 31^<st>, 2008. It was the first time to be used in TV program.
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  • Shuichi NITTA
    Type: Article
    Session ID: BCT2009-54
    Published: March 13, 2009
    Released: September 20, 2017
    CONFERENCE PROCEEDINGS FREE ACCESS
    This report reviews the widely used reliability evaluation method, proposes the introduction of EMC (immunity) to reliability evaluation, picks up an operations conditions of the electronics systems from the viewpoint of EMC (EMI) and the relationship between EMC, and the reliability enhancement method and the reliability evaluation test, and finally, proposes the safety keeping for electronics systems' upset due to noises.
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  • Type: Appendix
    Pages App1-
    Published: March 13, 2009
    Released: September 20, 2017
    CONFERENCE PROCEEDINGS FREE ACCESS
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  • Type: Appendix
    Pages App2-
    Published: March 13, 2009
    Released: September 20, 2017
    CONFERENCE PROCEEDINGS FREE ACCESS
    Download PDF (84K)
  • Type: Appendix
    Pages App3-
    Published: March 13, 2009
    Released: September 20, 2017
    CONFERENCE PROCEEDINGS FREE ACCESS
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