FUJIMOTO Mitoshi

FacultyInformation Science
Teacher OrganizationInformation Science
Education and
 Research Organization
Faculty of Engineering /Graduate School of Engineering
PositionProfessor
Last Updated: 19/07/23 19:05

Researcher Profile & Settings

Name

    FUJIMOTO Mitoshi

Affiliation

  •  Information Science Professor

Research Activities

Published Papers

  • Noise suppression system for AM radio using Hilbert transformation
    IEICE Communications Express 5(5) May  2016 Refereed
  • Variable-Reflection-Angle Meta-surface using Double -Layered Patch-Type FSS
    Ryuji Kuse, Toshikazu Hori, Mitoshi Fujimoto
    IEICE Communications Express 5(8) Aug.  2016 Refereed
  • Equivalent Circuit Analysis of Meta-surface using Double-layered Patch-type FSS
    Ryuji Kuse, Toshikazu Hori, Mitoshi Fujimoto, Takuya Seki, Keisuke Sato, Ichiro Oshima
    IEICE Transaction on Communications E99-B(11) 2373-2380 Nov.  2016 Refereed
  • Improvement of coupling suppression by using multi-stacked mushroom structure
     5(6) Jun.  2016 Refereed
  • Noise suppression system for AM radio using Hilbert transformation
    IEICE Communications Express 5(5) 142-146 May  2016 Refereed
  • B-1-16 Propagation Loss Characteristics by Human Body Cover in Street Microcell Area
    IMAGAWA Hayato;HORI Toshikazu;FUJIMOTO Mitoshi
    Proceedings of the IEICE General Conference 2015(1) Feb.  2015
  • B-1-26 Effect of Building Structure on Propagation Loss in Street Cell Model
    WATANABE Yusuke;HORI Toshikazu;FUJIMOTO Mitoshi
    Proceedings of the IEICE General Conference 2015(1) Feb.  2015
  • B-1-72 Effect of Taper Sharp in Antipodal Fermi Antenna
    MORITA Homare;HORI Toshikazu;FUJIMOTO Mitoshi
    Proceedings of the IEICE General Conference 2015(1) Feb.  2015
  • B-1-114 Configuration of Double Layered Patch Type Meta-surface with Variable Reflection Angle
    KUSE Ryuji;HORI Toshikazu;FUJIMOTO Mitoshi
    Proceedings of the IEICE General Conference 2015(1) Feb.  2015
  • B-1-116 Optimum Unit Cell Size for Flat Reflector Antenna with Meta-Surface
    MORIYAMA Kuniyoshi;HORI Toshikazu;FUJIMOTO Mitoshi
    Proceedings of the IEICE General Conference 2015(1) Feb.  2015
  • B-1-117 Metal Patch Shape Suitable for Polarization Conversion Meta-surface
    KAMIYA Misaki;KUSE Ryuji;HORI Toshikazu;FUJIMOTO Mitoshi
    Proceedings of the IEICE General Conference 2015(1) Feb.  2015
  • B-1-148 Dual-band Dipole Antenna with Dual Structure Side Reflectors for Orthogonal Polarization
    SUGIMOTO Yoshiki;HORI Toshikazu;FUJIMOTO Mitoshi
    Proceedings of the IEICE General Conference 2015(1) Feb.  2015
  • B-1-176 Proposal of Noise Suppression Technique on AM Signal using Quadrature Demodulation
    ITO Shinya;FUJIMOTO Mitoshi;HORI Toshikazu;HARADA Tomohisa;HATTORI Yoshiyuki
    Proceedings of the IEICE General Conference 2015(1) Feb.  2015
  • B-1-177 Prevention of Nonlinear Distortion due to Strong Interference in Amplifier
    TAKAMURA Hiroya;FUJIMOTO Mitoshi;HORI Toshikazu
    Proceedings of the IEICE General Conference 2015(1) Feb.  2015
  • B-1-184 Effect of Calibration in Near Field object Position Estimation
    MAMIYA Takurou;FUJIMOTO Mitoshi;HORI Toshikazu;TABATA Takanobu;HORI Satoshi
    Proceedings of the IEICE General Conference 2015(1) Feb.  2015
  • B-1-185 Near Field Metal Object Detection using Circular Antenna Array
    MURANISHI Yuki;FUJIMOTO Mitoshi;HORI Toshikazu;TABATA Takanobu;HORI Satoshi
    Proceedings of the IEICE General Conference 2015(1) Feb.  2015
  • B-1-209 Simple Beam Control Method using Time Delay in MIMO-OFDM Transmission
    YOSHIDA Hiroki;FUJIMOTO Mitoshi;HORI Toshikazu
    Proceedings of the IEICE General Conference 2015(1) Feb.  2015
  • B-1-11 Effect of Covering Objects on Propagation Loss in Street Environment
    IMAGAWA Hayato;HORI Toshikazu;FUJIMOTO Mitoshi
    Proceedings of the Society Conference of IEICE 2015(1) Aug.  2015
  • B-1-27 Limit of Radiation Characteristic in Small Taper Slot Antenna
    MORITA Homare;HORI Toshikazu;FUJIMOTO Mitoshi
    Proceedings of the Society Conference of IEICE 2015(1) Aug.  2015
  • B-1-97 Configuration of Meta-surface for Reflected Wave Reduction
    NAKATANI Koya;HORI Toshikazu;FUJIMOTO Mitoshi
    Proceedings of the Society Conference of IEICE 2015(1) Aug.  2015
  • B-1-98 Improvement of Axial Ratio of Meta-Surface with Polarized Wave Conversion Function
    KUSE Ryuji;HORI Toshikazu;FUJIMOTO Mitoshi
    Proceedings of the Society Conference of IEICE 2015(1) Aug.  2015
  • B-1-99 Orthogonal Polarization Conversion FSS by Using Triple Layered Loop-Slot Elements
    HANDA Shiro;HORI Toshikazu;FUJIMOTO Mitoshi
    Proceedings of the Society Conference of IEICE 2015(1) Aug.  2015
  • B-1-124 Proposal of Position Estimation Method in Near Field using Bary center of Hyperbolic Intersections
    MAMIYA Takurou;FUJIMOTO Mitoshi;HORI Toshikazu;TABATA Takanobu;HORI Satoshi
    Proceedings of the Society Conference of IEICE 2015(1) Aug.  2015
  • B-1-144 Seured Communication System for Multi-Direction with Adaptive Array Antennas
    TAKEMOTO Kenji;FUJIMOTO Mitoshi;HORI Toshikazu
    Proceedings of the Society Conference of IEICE 2015(1) Aug.  2015
  • B-1-148 Proposal of Noise Suppression System for AM by using Quadrature Demodulation and PI Algorithm
    ITO Shinya;FUJIMOTO Mitoshi;HORI Toshikazu;HARADA Tomohisa;HATTORI Yoshiyuki
    Proceedings of the Society Conference of IEICE 2015(1) Aug.  2015
  • B-1-40 Effect of Blocking Objects on Arrival Angle of Delayed Path in Street Cell Environment
    IMAGAWA Hayato;HORI Toshikazu;FUJIMOTO Mitoshi;OMAKI Nobutaka;IMAI Tetsuro
    Proceedings of the IEICE General Conference 2016(1) Mar.  2016
  • B-1-104 Multilayer FSS with Wideband Orthogonal Polarization Conversion Characteristics
    HANDA Shiro;HORI Toshikazu;FUJIMOTO Mitoshi
    Proceedings of the IEICE General Conference 2016(1) Mar.  2016
  • B-1-166 Directional Control Method of Interference Wave Suppression System with Parasitic Element
    TAKAMURA Hiroya;FUJIMOTO Mitoshi;HORI Toshikazu
    Proceedings of the IEICE General Conference 2016(1) Mar.  2016
  • B-1-167 Effect of synchronization error and pseudo-noise on ANSAR
    ITO Shinya;FUJIMOTO Mitoshi;HORI Toshikazu;HARADA Tomohisa;HATTORI Yoshiyuki
    Proceedings of the IEICE General Conference 2016(1) Mar.  2016
  • B-1-204 Theoretical Examination in Near Field Object Position Estimation
    MAMIYA Takuro;FUJIMOTO Mitoshi;HORI Toshikazu;TABATA Takanobu;HORI Satoshi
    Proceedings of the IEICE General Conference 2016(1) Mar.  2016
  • B-1-205 Successive Position Estimation Method for Multiple Object using UWB signal
    MURANISHI Yuki;FUJIMOTO Mitoshi;HORI Toshikazu
    Proceedings of the IEICE General Conference 2016(1) Mar.  2016
  • B-1-217 Weight Control Method in MIMO-OFDM Transmission using Linear Interpolation
    YOSHIDA Hiroki;FUJIMOTO Mitoshi;HORI Toshikazu
    Proceedings of the IEICE General Conference 2016(1) Mar.  2016
  • B-1-233 Flexible Area Control for Secured Communication System
    TAKEMOTO Kenji;FUJIMOTO Mitoshi;HORI Toshikazu
    Proceedings of the IEICE General Conference 2016(1) Mar.  2016
  • Effect of miniaturization of the unit cell of a meta-surface using double-layered FSS
    Kuse Ryuji;Hori Toshikazu;Fujimoto Mitoshi;Seki Takuya;Sato Keisuke;Oshima Ichiro
    IEICE ComEX 4(12) 376-381 2015
    This paper proposes a meta-surface for a miniaturized unit cell that consists of a double-layered Frequency Selective Surface (FSS) and the ground plane. Additional miniaturization of the unit cell is achieved by sliding one layer of the double-layered FSS in the polarization direction of an incident wave. Moreover, the unit cell becomes smaller than half the size of a conventional single-layered meta-surface by using the double-layered FSS.
  • Noise Suppression System for AM Radio using Hilbert Transformation
    Ito Shinya;Fujimoto Mitoshi;Hori Toshikazu;Harada Tomohisa;Hattori Yoshiyuki
    IEICE Communications Express 0 2016
    In recent years, an interference of artificial noises from an electrical power transfer becomes large and deterioration of a sound quality of an AM radio is worried. In this paper, a novel noise suppression system using quadrature demodulation techniques is proposed to reduce the effect of the interference. The proposed system utilizes the fact that the in-phase signal from the demodulator includes both of the AM signal and the noise, on the other hand, the quadrature signal includes only the noise. Thus, the interference in the in-phase signal can be canceled by using the quadrature signal. Since the sign of the both interferences are different each other, Hilbert transformation is utilized to match the sign of the interferences. Validity of the proposed system is shown through computer simulation and experiments.
  • Improvement of coupling suppression by using multi-stacked mushroom structure
    Kawakami Yuki;Kuse Ryuji;Hori Toshikazu;Fujimoto Mitoshi
    IEICE Communications Express 0 2016
    This paper proposes a multi-stacked mushroom structure to suppress the mutual coupling between monopole antennas, whose height is taller than that of a conventional mushroom structure. Based on moment method analysis results, it is clarified that the multi-stacked mushroom structure can suppress the mutual coupling more than a conventional 2D arranged structure. Furthermore, the validity of the results is clarified by experiments.
  • Noise suppression system for AM radio using Hilbert transformation
    Ito Shinya;Fujimoto Mitoshi;Hori Toshikazu;Harada Tomohisa;Hattori Yoshiyuki
    IEICE Communications Express 5(5) 142-146 2016
    In recent years, an interference of artificial noises from an electrical power transfer becomes large and deterioration of a sound quality of an AM radio is worried. In this paper, a novel noise suppression system using quadrature demodulation techniques is proposed to reduce the effect of the interference. The proposed system utilizes the fact that the in-phase signal from the demodulator includes both of the AM signal and the noise, on the other hand, the quadrature signal includes only the noise. Thus, the interference in the in-phase signal can be canceled by using the quadrature signal. Since the sign of the both interferences are different each other, Hilbert transformation is utilized to match the sign of the interferences. Validity of the proposed system is shown through computer simulation and experiments.
  • Equivalent Circuit Analysis of Meta-surface using Double-layered Patch-type FSS
    KUSE Ryuji;HORI Toshikazu;FUJIMOTO Mitoshi;SEKI Takuya;SATO Keisuke;OSIMA Ichiro
    IEICE Transactions on Communications 0 2016
    This paper describes an equivalent circuit analysis of a meta-surface using a double-layered patch-type frequency-selective surface (FSS); the analysis considers the coupling between FSSs. Two types of double-layered structures are examined. One is a stacked structure and the other is an alternated structure. The results calculated using the equivalent circuit are in agreement with the results of the FDTD analysis. In addition, it is clarified that the stacked and alternated structures exhibit the common mode and the differential mode coupling, respectively. Moreover, experiments support analysis results for both stacked and alternated structures.
  • Noise Suppression System for AM Signal using Quadrature Demodulation and PI Algorithm
    Ito Shinya;Fujimoto Mitoshi;Hori Toshikazu;Harada Tomohisa;Hattori Yoshiyuki
    The transactions of the Institute of Electrical Engineers of Japan.A 136(6) 330-335 2016
    In recent years, a problem of interfering by artificial noises from a electrical power transfer become large and deterioration of a sound quality of an AM radio is worried. In this paper, a noise suppression system using quadrature demodulation techniques is proposed to reduce the effect of the interfering. The proposed system utilizes a fact that the quadrature signal includes only the interference, while the in-phase signal from the demodulator includes both of AM signal and interference. To cancel the noise component in the in-phase signal, the noise component in the quadrature signal is adjusted by a tapped delay line because the sign of the both interference is different each other. Weight coefficients of the tapped delay line are determined based on power inversion (PI) algorithm. Thus, the interference in the in-phase signal can be canceled by the quadrature signal. Validity of the proposed system is shown through computer simulations.
  • Improvement of coupling suppression by using multi-stacked mushroom structure
    Kawakami Yuki;Kuse Ryuji;Hori Toshikazu;Fujimoto Mitoshi
    IEICE Communications Express 5(6) 147-151 2016
    This paper proposes a multi-stacked mushroom structure to suppress the mutual coupling between monopole antennas, whose height is taller than that of a conventional mushroom structure. Based on moment method analysis results, it is clarified that the multi-stacked mushroom structure can suppress the mutual coupling more than a conventional 2D arranged structure. Furthermore, the validity of the results is clarified by experiments.
  • Variable-Reflection-Angle Meta-surface using Double -Layered Patch-Type FSS
    Kuse Ryuji;Hori Toshikazu;Fujimoto Mitoshi
    IEICE Communications Express 0 2016
    This paper describes a variable-reflection-angle meta-surface that can control a scattering pattern by sliding one layer of a double-layered frequency selective surface. A reflection angle within a range of approximately 2° to 35° is obtained in the proposed structure according to the unit cell analysis of the meta-surface. A scattering pattern is calculated by FDTD analysis, and the peaks are in good agreement with the range.
  • Variable-reflection-angle meta-surface using double-layered patch-type FSS
    Kuse Ryuji;Hori Toshikazu;Fujimoto Mitoshi
    IEICE Communications Express 5(8) 290-296 2016

    This paper describes a variable-reflection-angle meta-surface that can control a scattering pattern by sliding one layer of a double-layered frequency selective surface. A reflection angle within a range of approximately 2° to 35° is obtained in the proposed structure according to the unit cell analysis of the meta-surface. A scattering pattern is calculated by FDTD analysis, and the peaks are in good agreement with the range.

  • Equivalent Circuit Analysis of Meta-Surface Using Double-Layered Patch-Type FSS
    KUSE Ryuji;HORI Toshikazu;FUJIMOTO Mitoshi;SEKI Takuya;SATO Keisuke;OSHIMA Ichiro
    IEICE Transactions on Communications 99(11) 2373-2380 2016

    This paper describes an equivalent circuit analysis of a meta-surface using a double-layered patch-type frequency-selective surface (FSS); the analysis considers the coupling between FSSs. Two types of double-layered structures are examined. One is a stacked structure and the other is an alternated structure. The results calculated using the equivalent circuit are in agreement with the results of the FDTD analysis. In addition, it is clarified that the stacked and alternated structures exhibit the common mode and the differential mode coupling, respectively. Moreover, experiments support analysis results for both stacked and alternated structures.

  • Recent technologies in Japan on array antennas for wireless systems
    Hirokawa Jiro;Chen Qiang;Fujimoto Mitoshi;Yamaguchi Ryo
    IEICE Transactions on Communications 2017

    Array antenna technology for wireless systems is highly integrated for demands such as multi-functionality and high-performance. This paper details recent technologies in Japan in design techniques based on computational electromagnetics, antenna hardware techniques in the millimeter-wave band, array signal processing to add adaptive functions, and measurement methods to support design techniques, for array antennas for future wireless systems. Prospects of these four technologies are also described.