Okayama UniversityOEW Lab

Publications

Journal and International Conference

2024

  1. Shohei Kan, Zhenhong Xu, Akito Mashino, Kengo Iokibe, and Yoshitaka Toyota, "Effective EMI Suppression Procedure Using RL Snubbers for Automotive Brush Motor Systems," IEEE Letters on Electromagnetic Compatibility Practice and Applications, 2024.DOI
  2. Masaki Himuro, Kengo Iokibe, and Yoshitaka Toyota, “Triangular Pulse-based IC Switching Current Model Using Multiple Regression Analysis for Fast Side-channel Attack Prediction,” IEEE Trans. Electoromagn. Compat., Vol. 66, No. 1, pp. 49-60, Jan. 2024.DOI

2023

  1. Masaki Himuro, Kengo Iokibe, and Yoshitaka Toyota, “Prediction Accuracy Improvement of Side-channel Information Leakage by Using EM-Circuit Co-simulation of PDN with Filters,” 2023 International Symposium on Electromagnetic Compatibility (EMC Europe), Krakow, Poland, Sep. 2023.
  2. Kengo Iokibe, Kohei Shimoda, Masaki Himuro, and Yoshitaka Toyota, “Experimental Investigation of Side-Channel Information Leakage from Printed Circuit Boardwith Split Ground Planes,” 2023 IEEE International Symposium on Electromagnetic Compatibility, Signal & Power Integrity (EMC+SIPI), pp. 365-370, Grand Rapids, USA, Aug. 2023.
  3. Yoshitaka Toyota, Yanyu Jin, Shuqi Zhang, and Kengo Iokibe, “Prediction of Conducted Emissions from Various DC-DC Converters by Using Two-Port Noise-Source Equivalent-Circuit Model,” 2023 Joint Asia-Pacific Symposium on Electromagnetic Compatibility (APEMC) and International Conference on Electromagnetic Interference & Compatibility (INEMIC), Bengaluru, India, May, 2023.
  4. Kengo Iokibe, Takeshi Nomura, Hiroaki Takatsu, Takahiro Tsujimoto, and Yoshitaka Toyota, "Common-Mode Radiated Emission Analysis of Cable-Connected Printed Boards with Adjacent Metal Chassis by Imbalance Difference Model," Transactions of The Japan Institute of Electronics Packaging, Vol. 16, pp. E22-003-1-E22-003-9, June 2023.DOI
  5. Shuqi Zhang, Kengo Iokibe, and Yoshitaka Toyota, "An Approach to Identify Noise-source Parameters of DC-DC Converter and Predict Conducted Emissions with Different Loads," IEEE Letters on Electromagnetic Compatibility Practice and Applications (L-EMCPA), Vol. 5, No. 1, pp. 5-9, Mar. 2023.DOI
  6. Sho KANAO, Kengo Iokibe, and Yoshitaka Toyota, "Evaluation of Unintentional Electromagnetic Radiation Based on Radiation-Factor Decomposition in Suppression of Power-bus Resonance by Lossy Resonator Filters," IEICE Transactions on Communications, Vol.J106-B, No.07, Jul. 2023.[In Japanese]DOI
  7. Shuqi Zhang, Kengo Iokibe, and Yoshitaka Toyota, "Conducted Noise Prediction for DC-DC Converter by Noise Source Model Accounting for Switching Fluctuation," IEEE Trans. Electromagn. Compat., Vol. 65, No. 3, pp. 924-934, Jun. 2023. DOI

2022

  1. Shuji Taue, Takumi Tanaka, Hiroto Suzuki, and Yoshitaka Toyota, "Detection of AC magnetic field distribution using optical magnetometer with digital micro-mirror device," OPTICS & PHOTONICS International Congress 2022 (OPTM2022), OPTM7-02, Yokohama, Japan, Apr. 18-22, 2022.
  2. Kengo Iokibe, Masaki Himuro, and Yoshitaka Toyota, "A Study for Improving Signal-to-Noise Ratio Measurement Method in Side-Channel Information Leakage of Cryptographic Hardware," 2022 IEEE International Symposium on Electromagnetic Compatibility, Signal & Power Integrity (EMC+SIPI 2022), pp. 294-298, Spokane, USA, Aug. 1-5, 2022. DOI
  3. Shohei Kan, Ryuta Nakanishi, Zhenhong Xu, Kengo Iokibe, and Yoshitaka Toyota, "Multi-Objective Design of Filter Installed in Brush Motor by Preference Set-based Design Accounging for Cable Length," 2022 IEEE International Symposium on Electromagnetic Compatibility, Signal & Power Integrity (EMC+SIPI 2022), pp. 595, Spokane, USA, Aug. 1-5, 2022.
  4. Sho Kanao, Hiroaki Iwasaki, Kengo Iokibe, and Yoshitaka Toyota, "Co-simulation Analysis of Mode Conversion Due to Imbalance difference by Structural Discontinuity," 2022 Asia-Pacific International Symposium on Electromagnetic Compatibility (APEMC 2022), FR-AM1-SS08-05, Online, Beijing, China, Sep. 5-8, 2022.
  5. Sho Kanao, Shuhei Kodama, Kengo Iokibe, and Yoshitaka Toyota, "Suppression of Power-Bus Resonance and Unintentional Radiation by Lossy Resonator Filter," 2022 International Symposium on Electromagnetic Compatibility (EMC Europe 2022), pp. 361-365, Online, Gothenburg, Sweden, Sep. 5-8, 2022.
  6. Masaki Himuro, Kengo Iokibe, and Yoshitaka Toyota, "FPGA Switching Current Modeling Based on Register Transfer Level Logic Simulation for Power Side-channel Attack Prediction," 2022 International Symposium on Electromagnetic Compatibility (EMC Europe 2022), pp. 172-177, Gothenburg, Sweden, Sep. 5-8, 2022. DOI
  7. Shuqi Zhang, Kengo Iokibe, Yoshitaka Toyota, "A Load-variable Noise-source Equivalent Circuit Model for DC-DC Converter Considering Cubic Spline Interpolation," 11th IEEE CPMT Symposium Japan (ICSJ 2022), pp. 154-157, Kyoto, Japan, Nov. 9-11, 2022.
  8. Shun Igarashi*, Daisuke Miyawaki*, Suguru Yamagishi*, Ichiro Kuwayama*, Kengo Iokibe, Yoshitaka Toyota (*Sumitomo Electric Industries), "Unintentional radiated emissions from unshielded twisted pair cable attributed to twist structure," IEICE Communications Express (ComEX), Vol. 11, No. 11, pp. 691-696, Nov. 2022. DOI

2021

  1. Yusuke Yano, Kengo Iokibe, Toshiaki Teshima, Yoshitaka Toyota, Toshihiro Katashita, and Yohei Hori, "Evaluation of Side-channel Leakage Simulation by Using EMC Macro-model of Cryptographic Devices," IEICE Transactions on Communications, Vol. E104-B, No. 2, pp. 178-186, Feb. 2021.
  2. Chenyu Wang, Kengo Iokibe, and Yoshitaka Toyota, "Practical Design Methodology of Mode-Conversion-Free Tightly Coupled Asymmetrically Tapered Bend for High-Density Differential Wiring," IEICE Transactions on Communications, Vol. E104-B, No. 3, pp. 304-311, Mar. 2021.DOI
  3. Sho Kanao, Kengo Iokibe, and Yoshitaka Toyota, "Efficient Estimation of Noise Suppression Amount in Power Bus with Decoupling Capacitors Using Lossy Resonator Filters," 2021 Joint IEEE International Symposium on Electromagnetic Compatibility, Signal & Power Integrity & EMC Europe(IEEE EMC+SIPI 2021 Virtual Symposium), 1 page, Jul. 26-Aug. 20, 2021 (Online).
  4. Shuqi Zhang, Taishi Uematsu, Kengo Iokibe, Yoshitaka Toyota, "Noise-Source Parameter Identification Considering Switching Fluctuation of DC-DC Converter,"2021 Joint IEEE International Symposium on Electromagnetic Compatibility, Signal & Power Integrity & EMC Europe(IEEE EMC+SIPI 2021 Virtual Symposium), 1 page, Jul. 26-Aug. 20, 2021 (Online).
  5. Kengo Iokibe, Masaki Himuro, Yoshitaka Toyota, "A Study for Low Calculation Cost Side-Channel Resistance Prediction Based on Transfer Impedance of Leakage Path," 2021 Asia Pacific International Symposium on Electromagnetic Compatibility (APEMC), SS-02-03, Sep.27-30,2021 (Online). DOI
  6. Shuqi Zhang, Kengo Iokibe, Yoshitaka Toyota, "An Approach to Predicting Conducted Noise from DC-DC Converter Accounting for Switching Fluctuation,"2021 Asia Pacific International Symposium on Electromagnetic Compatibility (APEMC), Sep.27-30,2021 (Online).
  7. Md. Ashraful Islam, Masaki Himuro, Kengo Iokibe, and Yoshitaka Toyota, "Mode Conversion Suppression at the Discontinuity point on Power Delivery Network for Side-channel Attack Countermeasure," International Conference on Computer, Communication, Chemical, Materials and Electronic Engineering (IC4ME2), 3, Rajshahi, Bangladesh, Dec. 25-27, 2021.

2020

  1. Shuji Taue and Yoshitaka Toyota, "Signal-Source Estimation from Magnetic Field Image Obtained Using Atomic Magnetometer and Digital Micro-Mirror Device," Optical Review, Vol.27, pp.258-263, 2020.3 (DOI: 10.1007/s10043-020-00591-y).
  2. Chenyu Wang, Kengo Iokibe, and Yoshitaka Toyota, "Mitigating Differential Skew by Rotating Meshed Ground for High-Density Layout in Flexible Printed Circuits," IEICE Electronics Express, Vol.17, No.10, pp.1-6, 2020.5. DOI
  3. Kengo Iokibe, Tomonobu Kan, and Yoshitaka Toyota, "A Study on Evaluation Board Requirements for Assessing Vulnerability of Cryptographic Modules to Side-Channel Attacks," 2020 IEEE International Symposium on Electromagnetic Compatibility & Signal/Power Integrity (2020 IEEE EMC+SIPI), pp. 528-531, Jul. 28-Aug. 28, 2020. DOI
  4. Sho Kanao, Kengo Iokibe, and Yoshitaka Toyota, "Estimation of Power-bus Noise Suppression by Lossy Resonator Filter Using Lumped-constant Multi-ports Equivalent Circuit Model," 2020 IEEE International Symposium on Electromagnetic Compatibility & Signal/Power Integrity (2020 IEEE EMC+SIPI), 1 page, Jul. 28-Aug. 28, 2020.
  5. Daiki Kameyama, Kengo Iokibe and Yoshitaka Toyota, "Preliminary Investigation of Impedance Discontinuity Detection on Wire Network Using Sequence Time Domain Reflectometry," 2020 International Symposium on Electromagnetic Compatibility (EMC Europe 2020), TS12-5, Sep. 23-25, 2020.
  6. Tomoya Takeuchi, Kengo Iokibe and Yoshitaka Toyota, "Suppression of Mode Conversion Due to Asymmetric Geometry of Dense Parallel Traces in Differential-Transmission Lines," 2020 International Symposium on Electromagnetic Compatibility (EMC Europe 2020), TS19-6, Sep. 23-25, 2020(オンライン).
  7. Shuqi Zhang, Taishi Uematsu, Kengo Iokibe and Yoshitaka Toyota, "Two-port Noise Source Equivalent Circuit Model for DC/DC Buck Converter with Consideration of Load Effect," 2020 International Symposium on Electromagnetic Compatibility (EMC Europe 2020), OD9-1, Sep. 23-25, 2020.
  8. Md. Ashraful Islam, Kengo Iokibe, and Yoshitaka Toyota, "Suppression of Mode Conversion at Ethernet Connector by Using Modal-Equivalent Circuit Model Based on Imbalance Matching," IEEJ Transactions on Fundamentals and Materials, Vol.140, No.12, pp.586-592, 2020.12.

2019

  1. Kengo Iokibe, Yoshinori Uetake, Toshiaki Teshima, Akihiro Sanada, Yasuyuki Nogami, "Development of Practicum in Cryptographic Hardware Security Using Commercial Microcontroller Module," Computer Software, Vol. 36, No. 1, pp. 30-36, Feb., 2019. [in Japanese] DOI
  2. Chenyu Wang, Kengo Iokibe, Yoshitaka Toyota, "Mitigation of Differential Skew by Focusing on Angle between Differential Lines and Meshed Ground," IEICE Transactions on Communications, Vol. J102-B, No. 3, pp. 228-236, Mar., 2019. [in Japanese] DOI
  3. Shimpei Yoshino, Kengo Iokibe, Yusuke Yano, and Yoshitaka Toyota, "Intensity Estimation of Electromagnetic Emission from Individual ICs Based on Noise Source Amplitude Modulation and Correlation Analysis," Transactions of The Japan Institute of Electronics Packaging, Vol. 22, No. 3, pp. 218-225, May, 2019. [in Japanese] DOI
  4. Taishi Uematsu, Yuhei Osaki, Yusuke Yano, Kengo Iokibe, and Yoshitaka Toyota, "Improvement of Prediction Accuracy of Noise-source Equivalent-circuit Model Based on Parameter Extraction by Port Voltage/Current Measurement," 2019 Joint International Symposium on Electromagnetic Compatibility and Asia-Pacific International Symposium on Electromagnetic Compatibility, Sapporo (EMC Sapporo & APEMC 2019), TuePM2C.3, p. 151, Sapporo, Japan, Jun. 3-7, 2019.
  5. Md. Ashraful Islam, Ryota Irishika, Kengo Iokibe, and Yoshitaka Toyota, "Suppression of Mode Conversion by Improving Shielding Around Ethernet Connector with Imbalance Matching," 2019 Joint International Symposium on Electromagnetic Compatibility and Asia-Pacific International Symposium on Electromagnetic Compatibility, Sapporo (EMC Sapporo & APEMC 2019), FriAM1B.2, p. 785, Sapporo, Japan, Jun. 3-7, 2019.
  6. Chenyu Wang, Hiroaki Takeda, Kengo Iokibe, and Yoshitaka Toyota, "Reduction Mechanism of Differential-Mode Crosstalk between Adjacent Differential Pairs with Periodic Structure," 2019 Joint International Symposium on Electromagnetic Compatibility and Asia-Pacific International Symposium on Electromagnetic Compatibility, Sapporo (EMC Sapporo & APEMC 2019), FriAM1B.3, p. 786, Sapporo, Japan, Jun. 3-7, 2019.
  7. Yusuke Yano, Toshiaki Teshima, Kengo Iokibe, and Yoshitaka Toyota, "Experimental Identification of Relationship between Leakage Trace SNR and Correlation Coefficient in Differential Power Analysis," 2019 Joint International Symposium on Electromagnetic Compatibility and Asia-Pacific International Symposium on Electromagnetic Compatibility, Sapporo(EMC Sapporo & APEMC 2019), FriAM1C.4, pp. 797-800, Sapporo, Japan, Jun. 3-7, 2019.DOI
  8. Yoshitaka Toyota, "Parameter Identification Based on Measurement and EMI Prediction of Noise-source Equivalent Circuit Model for Power Converters," International Conference on Computer, Communication, Chemical, Materials and Electronic Engineering (IC4ME2), Rajshahi, Bangladesh, Jul. 11-12, 2019 [Invited talk].
  9. Md. Ashraful Islam, Ryota Irishika, Kengo Iokibe, and Yoshitaka Toyota, "Suppression of Mode Conversion by Improved Shielding Effect of Ethernet Cable Connector Based on Imbalance Factor Matching," International Conference on Computer, Communication, Chemical, Materials and Electronic Engineering (IC4ME2), 303, Rajshahi, Bangladesh, Jul. 11-12, 2019.
  10. Chenyu Wang, Kengo Iokibe, and Yoshitaka Toyota, "Randomly Shifted Mesh Position of Meshed Ground for High-Density Mounting in FPCs," 2019 IEEE International Symposium on Electromagnetic Compatibility, Signal and Power Integrity, 1 page, New Orleans, Louisiana, Jul. 22-26, 2019.
  11. Yusuke Yano, Naoki Kawata, Kengo Iokibe, and Yoshitaka Toyota, “A Method for Optimally Designing Snubber Circuits for Buck Converter Circuits to Damp LC Resonance,” IEEE Transactions on Electromagnetic Compatibility, Vol. 61, No. 4, pp. 1217-1225, Aug. 2019.
  12. Shuji Taue, Nao Arita, and Yoshitaka Toyota, "AC magnetic field imaging by using atomic magnetometer and micro-mirror device," 2019 International Symposium on Electromagnetic Compatibility (EMC Europe 2019), O_Tu_D_2e, pp. 253-256, Barcelona, Spain, Sep. 2-6, 2019.
  13. Kengo Iokibe, Shimpei Yoshino, Yusuke Yano, and Yoshitaka Toyota, "Modifying Noise Source Amplitude Modulation Technique to Estimate Magnitude and Phase of Emissions from Individual Integrated Circuits," 2019 International Symposium on Electromagnetic Compatibility (EMC Europe 2019), O_Th_A_2, pp. 774-777, Barcelona, Spain, Sep. 2-6, 2019.
  14. Yoshitaka Toyota, Sho Kanao, Kengo Iokibe, "Design of Vialess Open-stub EBG Structure by Using Preference Set-based Design Method," 2019 International Symposium on Electromagnetic Compatibility (EMC Europe 2019), pp. 944-947, Barcelona, Spain, Sep. 2-6, 2019.

2018

  1. Tohlu Matsushima, Tetsushi Watanabe, Yoshitaka Toyota, Liuji R. Koga, and Osami Wada, "Validation of Prediction Method of Common-Mode Current Reduction Based on Imbalance Difference Model for Differential Transmission Line Placed Near Edge of Adjacent Ground Plane," Transactions of The Japan Institute of Electronics Packaging, Vol.21, No.2, pp.178-185, 2018.3. [in Japanese]
  2. Hiroaki Takeda, Kengo Iokibe, and Yoshitaka Toyota, " Crosstalk Suppression by Introducing Periodic Structure into Differential Transmission Lines," IEICE Transactions on Communications, Vol.J101-B, No.3, pp.212-219, 2018.3. [in Japanese]
  3. Chenyu Wang, Kengo Iokibe, and Yoshitaka Toyota, “Optimum rotation angle for mitigating differential skew induced by glass cloth in PCBs,” Electronics Packaging and iMAPS All Asia Conference (ICEP-IAAC 2018), pp.328-332, Mie, Japan, 2018.4.17-20.
  4. Chenyu Wang, Kengo Iokibe, and Yoshitaka Toyota,“Differential-skew mitigation by rotating meshed ground,” 2018 IEEE International Symposium on Electromagnetic Compatibility and 2018 IEEE Asia-Pacific Symposium on Electromagnetic Compatibility (EMC/APEMC), p. 31, Singapore, 2018.5.14-17.
  5. Kengo Iokibe, Toshiaki Teshima, Yusuke Yano, and Yoshitaka Toyota, “Extension of signal-to-noise ratio measurement method to byte-by-byte side-channel attack,” 2018 IEEE International Symposium on Electromagnetic Compatibility and 2018 Asia-Pacific Symposium on Electromagnetic Compatibility (EMC/APEMC), WE-PM-SS-09-3, pp. 745-748, Singapore, 2018.5.14-17.
  6. Shuji Taue, Yoshitaka Toyota, "AC Magnetic Field Projection with Atomic Magnetometer," The 40th Progress In Electromagnetics Research Symposium (PIERS 2018 in Toyama), 2P15b-1,Toyama, Japan, 2018.8.1-4.
  7. Yoshitaka Toyota, Xingxiaoyu Lin, Kengo Iokibe, and Toshiyuki Kaneko, "Miniaturization of EBG Unit Cell to Suppress Noise Propagation by Dual Power Planes and Narrow Line," The 40th Progress In Electromagnetics Research Symposium (PIERS 2018 in Toyama), 3A5-1,Toyama, Japan, 2018.8.1-4.
  8. Sho Kanao, Kengo Iokibe, and Yoshitaka Toyota, "A Study of Installation Location and Mechanism to Suppress Power-bus Resonance Efficiently Using Lossy Resonator Filters," 2018 International Symposium on Electromagnetic Compatibility (EMC Europe 2018), pp. 890-894, Amsterdam, The Netherlands, 2018.8.27-30.
  9. Shimpei Yoshino, Chiaki Ishida, Kengo Iokibe, Yoshitaka Toyota, and Yasuyuki Nogami, "Determination of Dominant ICs for Electromagnetic Emission by Using Noise Source Amplitude Modulation and Correlation Analysis," 2018 International Symposium on Electromagnetic Compatibility (EMC Europe 2018), pp. 439-444, Amsterdam, The Netherlands, 2018.8.27-30.

Awards

  • Yoshitaka Toyota, Yanyu Jin, Shuqui Zhang, and Kengo Iokibe, Best Paper Award of the Joint APEMC and INCEMIC 2023, "Prediction of Conducted Emissions for Various DC-DC Converters by Using Noise-Source Equivalent-Circuit Model," 2023.5.25.
  • Masaki Himuro, Kengo Iokibe, and Yoshitaka Toyota, 2022 International Symposium on Electromagnetic Compatibility (EMC Europe 2022) Best Student Paper Award, "FPGA Switching Current Modeling Based on Register Transfer Level Logic Simulation for Power Side-channel Attack Prediction," Sep. 5-8, 2022.
  • Ryosuke Yamagata, Kengo Iokibe, and Yoshitaka Toyota, Optimization of Resistances in RL Snubbers for Power Distribution Network of Integrated Circuits, EMTS 2013 Young Scientist Award, 2013.5.22.
  • Kenta Ishimura, Yoshitaka Toyota, Kengo Iokibe, Koichi Kondo, and Shigeyoshi Yoshida, Effect of EBG Structure and Ferrite Film on Power/ground Layers for Performance Maintenance and Noise Suppressionin Wireless Communication, Best Student Paper Award (Poster Presentation), 2013.12.13.
  • Farhan Zaheed Mahmood, Yoshitaka Toyota, and Kengo Iokibe, Lossy resonators for suppressing power-bus resonance of printed circuit board, 5th Pan-Pacific EMC Joint Meeting (PPEMC'12), IEICE Technical Committee on Electromagnetic Compatibility Young Scientist Excellent Paper Award, 2012.11.30.
  • Keisuke Matsumoto, Yoshitaka Toyota, Kengo Iokibe, and Ryuji Koga, Physics-Based Modeling of DGS Filter Formed on Return Plane of Printed Circuit Boards, 4th Pan-Pacific EMC Joint Meeting (PPEMC'10), IEEE EMC Society Japan/Sendai Chapters Student Award, 2010.
  • Tohlu Matsushima, Tetsushi Watanabe, Yoshitaka Toyota, Ryuji Koga, and Osami Wada, "Calculation of Common-Mode Radiation from Single-Channel Differential Signaling System Using Imbalance Difference Model," IEICE Transactions on Communications, The IEICE Communications Society Best Paper Award, 2010.
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