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Geometrical design of electromagnetic fields based on topology of circuits with retarded coupling

Research Project

Project/Area Number 18K04139
Research Category

Grant-in-Aid for Scientific Research (C)

Allocation TypeMulti-year Fund
Section一般
Review Section Basic Section 21020:Communication and network engineering-related
Research InstitutionKyoto University

Principal Investigator

Hisakado Takashi  京都大学, 工学研究科, 准教授 (80301240)

Project Period (FY) 2018-04-01 – 2021-03-31
Project Status Completed (Fiscal Year 2020)
Budget Amount *help
¥4,290,000 (Direct Cost: ¥3,300,000、Indirect Cost: ¥990,000)
Fiscal Year 2020: ¥1,300,000 (Direct Cost: ¥1,000,000、Indirect Cost: ¥300,000)
Fiscal Year 2019: ¥1,690,000 (Direct Cost: ¥1,300,000、Indirect Cost: ¥390,000)
Fiscal Year 2018: ¥1,300,000 (Direct Cost: ¥1,000,000、Indirect Cost: ¥300,000)
Keywords回路モデル / 遅延電磁結合 / トポロジー / 幾何学的設計 / 等価回路 / グラフラプラシアン / 単導体線路 / 離散ダランベール演算子 / 遅延ポテンシャル / 終端 / ネットワーク / メタマテリアル / 伝搬遅延 / 回路のトポロジー / 電磁現象 / ラプラシアン
Outline of Final Research Achievements

By systematically deriving an equivalent circuit of topology equal to the conductor structure from Maxwell's equations and considering the retarded electromagnetic coupling of the electromagnetic field, we can obtain the intrinsic modes, frequency response, radiation and dispersion characteristics in complex structures. Using this fact, it was shown that various electromagnetic phenomena can be designed geometrically using the graph Laplacian as a circuit for coupling with electromagnetic fields existing outside the circuit in a circuit without an explicit return path. Specifically, we proposed the design of terminations, short circuits, and frequency response of transmission lines without return lines, single-mode excitation using singularities on light lines, the description of time-domain models by neutral-type delay differential equations and their stabilization, and the extension of single-conductor lines to bent lines.

Academic Significance and Societal Importance of the Research Achievements

通常の回路も電磁現象のダイナミクスを扱うが、明示的な帰路線を持ち、基本的に回路の中で閉じた現象を扱うことが多く、回路の外部に存在する電磁界も意識しながら扱うことは少ない。それに対して、明示的な帰路線の無い構造に対して、遅延電磁結合を考慮すると同時に、そのトポロジーをグラフラプラシアンで表現することにより、離散的なダランベール演算子を用いて、離散的な波として回路における現象を表現し、電磁界の特性も考慮した種々の設計手法を提案した。このことは、従来の回路の適用範囲を大幅に拡張すると同時に、電磁界の設計にも回路を用いた設計手法が適用できることを示している。

Report

(4 results)
  • 2020 Annual Research Report   Final Research Report ( PDF )
  • 2019 Research-status Report
  • 2018 Research-status Report
  • Research Products

    (12 results)

All 2021 2020 2019 2018

All Journal Article (3 results) (of which Peer Reviewed: 3 results,  Open Access: 1 results) Presentation (9 results) (of which Int'l Joint Research: 3 results)

  • [Journal Article] Single-Conductor Transmission Line Model Incorporating Radiation Reaction2021

    • Author(s)
      Daiki Tashiro; Takashi Hisakado; Tohlu Matsushima; Osami Wada
    • Journal Title

      IEEE Transactions on Electromagnetic Compatibility

      Volume: - Issue: 4 Pages: 1065-1077

    • DOI

      10.1109/temc.2020.3041468

    • Related Report
      2020 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] Excitation of the Light Line Mode with Metamaterials Composed of Parallel Conductors Based On Equivalent-Circuit Model Including Retarded Electromagnetic Coupling2020

    • Author(s)
      D. Akimarul; T. Hisakadol; M. Islaml; O. Wada
    • Journal Title

      2020 Fourteenth International Congress on Artificial Materials for Novel Wave Phenomena (Metamaterials)

      Volume: - Pages: 291-293

    • DOI

      10.1109/metamaterials49557.2020.9285165

    • Related Report
      2020 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Equivalent-Circuit Model with Retarded Electromagnetic Coupling for Meta-Atoms of Wired Metallic Spheres2018

    • Author(s)
      K. Ohishi, T. Hisakado, T. Matsushima, O. Wada
    • Journal Title

      IEICE Trans. Electronics, Vol.E101-C, No.12, 2018.

      Volume: E101-C Pages: 923-930

    • NAID

      130007539370

    • Related Report
      2018 Research-status Report
    • Peer Reviewed
  • [Presentation] 並行導体で構成されるメタマテリアルの遅延電磁結合を含む回路モデルを用いた時間領域解析2020

    • Author(s)
      秋丸大甫、久門尚史, イスラムマーフズル、和田修己
    • Organizer
      2020 年電子情報通信学会総合大会
    • Related Report
      2019 Research-status Report
  • [Presentation] Topological Tuning of a Dispersion Curve by Controlling Locations of Impurities with Equivalent Circuit Model2019

    • Author(s)
      A. Hasegawa, T. Hisakado, M. Islam and O. Wada
    • Organizer
      Metamaterials 2019
    • Related Report
      2019 Research-status Report
    • Int'l Joint Research
  • [Presentation] 有限長単導体線路モデルにおける放射の反作用と散乱の定式化2019

    • Author(s)
      田代大貴 久門尚史、松嶋徹、和田修己
    • Organizer
      電子情報通信学会
    • Related Report
      2019 Research-status Report
  • [Presentation] 伝搬遅延を含む等価回路モデルの遅延微分方程式を用いた時間領域解析2019

    • Author(s)
      秋丸大甫 久門尚史、マーフズル、和田修己
    • Organizer
      電子情報通信学会
    • Related Report
      2019 Research-status Report
  • [Presentation] グラフラプラシアンの摂動を用いたメタ原子のトポロジーの設計2019

    • Author(s)
      長谷川確 久門尚史 和田修己
    • Organizer
      電子情報通信学会
    • Related Report
      2018 Research-status Report
  • [Presentation] 単導体線路モデルにおける放射の反作用の時間領域評価2019

    • Author(s)
      鮫島佳奈 久門尚史 和田修己
    • Organizer
      電子情報通信学会
    • Related Report
      2018 Research-status Report
  • [Presentation] Topological Estimation of Resonant Frequencies by Equivalent Circuit for Star Meta-Atoms2018

    • Author(s)
      A. Hasegawa, T. Hisakado, T. Matsushima and O. Wada,
    • Organizer
      APMC
    • Related Report
      2018 Research-status Report
    • Int'l Joint Research
  • [Presentation] Formulation of Single-conductor Transmission Line Model with Feedback Electric Fields by Terminal Discontinuity2018

    • Author(s)
      D. Tashiro, T. Hisakado, T. Matsushima and O. Wada,
    • Organizer
      APMC
    • Related Report
      2018 Research-status Report
    • Int'l Joint Research
  • [Presentation] 伝搬遅延を含む等価回路による放射と共振のモデル化2018

    • Author(s)
      久門尚史、仲田涼馬、松嶋徹、和田修己
    • Organizer
      電子情報通信学会
    • Related Report
      2018 Research-status Report

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Published: 2018-04-23   Modified: 2022-01-27  

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