Search Results 1-13 of 13

  • Evaluation of the Radar Wave Analyzer in Actual Sea Condition  [in Japanese]

    奥山 悦郎 , 平山 圭一 , 箕浦 宗彦 , 三好 晋太郎

    日本船舶海洋工学会講演会論文集 Conference proceedings, the Japan Society of Naval Architects and Ocean Engineers (25), 597-600, 2017-11

  • The New Measurement Method of Spectrum for The Broader Millimeter Wave  [in Japanese]

    藤井 誠 , 横山 晃三 , 高橋 英明

    電子情報通信学会技術研究報告 = IEICE technical report : 信学技報 115(390), 7-10, 2016-01-14

  • Wide band stepped-frequency ground penetrating radar  [in Japanese]

    Kido Takashi , Sato Motoyuki

    …  The stepped-frequency continuous wave (SFCW) ground penetrating radar (GPR) combined with wideband bow tie antennas and a handheld vector network analyzer (VNA) is successfully demonstrated and compared with three types of commercial pulse GPRs for the detection and identification of the buried targets at depths of 20 cm, 80 cm and 2.5 m. …

    BUTSURI-TANSA(Geophysical Exploration) 69(4), 269-279, 2016

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  • Development of Preselected Millimeter-wave Spectrum Analyzer  [in Japanese]

    Fuse Masaaki , Noda Hanako , Kimura Yukiyasu , Kawamura Takashi , Otani Akihito

    … Recently, Millimeter-wave band is becoming more important in next-generation wireless application, such as automotive radar, IEEE802.11ad, mobile backhaul (5G wireless system). … This report shows the advantage of preselected millimeter-wave spectrum analyzer through the measurement results. … Moreover, we measured a 120 GHz QPSK modulation wave to demonstrate the effectiveness of this system with pre-selector. …

    IEEJ Transactions on Fundamentals and Materials 135(12), 729-735, 2015

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  • BASIC STUDY ON WAVES FAR FROM COASTAL AREA AND APPLICATION FOR SHIP OPERATION  [in Japanese]

    SASA Kenji , CHEN Chen , SHIOTANI Shigeaki , WAKABAYASHI Nobukazu , TERADA Daisuke

    …  There is little information of waves far from coastal zones currently, the possibility of wave information is studied here by using a wave radar analyzer and numerical simulation models, WRF and SWAN. … It is assured that measured wave data is practically enough accurate to apply for ship operation. … On the other hand, computed results in numerical models underestimate wave heights a little. …

    Journal of Japan Society of Civil Engineers, Ser. B3 (Ocean Engineering) 71(2), I_185-I_190, 2015

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  • Development of millimeter-wave spectrum analysis technology  [in Japanese]

    NODA Hanako , OKAMOTO Akifumi , FUSE Masaaki , OTANI Akihito

    … Recently, the millimeter-wave band is becoming more important in next-generation wireless applications, such as automotive radar, IEEE802.11ad, and 5G wireless systems, increasing the need for millimeter-wave measuring instruments. … Evaluating spectrum in this frequency band has been performed by combining a spectrum analyzer with a harmonic mixer on the conventional setup. …

    IEICE technical report. SRW, Short range wireless communications 114(177), 33-38, 2014-08-18

  • Ground Penetrating Radar: an Application to Estimate Volumetric Water Content and Reinforced Bar Diameter in Concrete Structures

    Leucci Giovanni

    … Experimental tests were carried out using an HP impedance analyzer. … These models, which represent rebars in a concrete medium, were used to detect rebar's position and study the rebar sizes as a function of the ratio of the cross polarized to normal polarized electromagnetic wave amplitudes. …

    Journal of Advanced Concrete Technology 10(12), 411-422, 2012

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  • Transformation of Near-field for Radar cross section  [in Japanese]

    KOBAYASHI Hirokazu , OSIPOV Andrey , SUZUKI Hirosuke

    … When the scattering pattern of radar cross section (RCS) is measured, the characteristic is usually evaluated in the far-field area. … In that case it is measured in the radio anechoic chamber to reduce unnecessary reflected wave and likely to deviate from the condition of the far-field according to the size or the measuring frequency. …

    IEICE technical report 110(173), 1-6, 2010-08-18

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  • Buried Pipe Detection Under the Road by High Resolution Frequency Domain GPR

    SHRESTHA Shanker Man , TOMIZAWA Yoshiyuki , ARAI Ikuo

    … In this paper, ground-penetrating radar (GPR), which has the capability to do non-destructive testing (NDT) in civil engineering field, is proposed to detect underground gas pipes, water pipes, electric cables or voids under a road. … SFCW (Stepped Frequency Continuous Wave) radar, which is based on vector network analyzer, is utilized for target detection and its performance is investigated. …

    Journal of The Remote Sensing Society of Japan 28(3), 231-245, 2008-06-25

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  • Ground Penetrating Radar and Wave Signal Processing and their Applications to Landmine Detection  [in Japanese]

    SATO Motoyuki , Feng Xuan , KOBAYASHI Takao , TAKAHASHI Kazunori

    … Ground Penetrating Radar (GPR) is a very effective landmine detection sensor, and many tests have been carried out in order to deploy the technique in the Demining operation. … SAR-GPR is a GPR system equipped with an array antenna and a compact vector network analyzer. …

    Journal of The Society of Instrument and Control Engineers 45(6), 491-497, 2006

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  • Measurements of the thickness of model sea ice by UHF waves (abstract)

    Takashima Hayao , Yamakoshi Hisao , Maeda Toshio , Sakurai Akio

    … It is indispensable to know the dielectric constant of model sea ice in order to detect the ice thickness by radar. … The transmitting antenna is a conical log spiral antenna for a right circular polarized wave. … The receiving antenna is an inverse type antenna so the reflected signal is inverted to a left circular polarized wave when the signal is reflected from the ice surface. …

    Proceedings of the NIPR Symposium on Polar Meteorology and Glaciology (7), 115, 1993-09

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  • Measurements of the thickness of model sea ice by UHF waves (abstract)

    Takashima Hayao , Yamakoshi Hisao , Maeda Toshio , Sakurai Akio

    … It is indispensable to know the dielectric constant of model sea ice in order to detect the ice thickness by radar. … The transmitting antenna is a conical log spiral antenna for a right circular polarized wave. … The receiving antenna is an inverse type antenna so the reflected signal is inverted to a left circular polarized wave when the signal is reflected from the ice surface. …

    Proceedings of the NIPR Symposium on Polar Meteorology and Glaciology 7, 115, 1993-09

  • Basic Field Experiment of a Directional Borehole Radar System with a Micro Array Antenna  [in Japanese]

    Ebihara Satoshi , Sato Motoyuki , Niitsuma Hiroaki

    … this paper we report on development and field experiment of a directional borehole radar system with a micro array antenna forprecise measurement of subsurfacel fracture.A network analyzer were adopted in this system for broad-band measurement.Field measurement was carried out in granite rock.The measured data was analyzed and a reflected wave was detected.Although we could not estimate its incident angle because of an inclined and biased sonde in a borehole,the result shows possibility that we will …

    IEICE technical report. Antennas and propagation 93(40), 83-90, 1993-05-21

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