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Study on 2D fast terahertz beam steering based on dielectric-free waveguiding structures

Research Project

Project/Area Number 20H02154
Research Category

Grant-in-Aid for Scientific Research (B)

Allocation TypeSingle-year Grants
Section一般
Review Section Basic Section 21020:Communication and network engineering-related
Research InstitutionThe University of Tokyo (2021-2022)
Keio University (2020)

Principal Investigator

Monnai Yasuaki  東京大学, 先端科学技術研究センター, 准教授 (90726770)

Project Period (FY) 2020-04-01 – 2023-03-31
Project Status Completed (Fiscal Year 2022)
Budget Amount *help
¥18,200,000 (Direct Cost: ¥14,000,000、Indirect Cost: ¥4,200,000)
Fiscal Year 2022: ¥3,380,000 (Direct Cost: ¥2,600,000、Indirect Cost: ¥780,000)
Fiscal Year 2021: ¥3,770,000 (Direct Cost: ¥2,900,000、Indirect Cost: ¥870,000)
Fiscal Year 2020: ¥11,050,000 (Direct Cost: ¥8,500,000、Indirect Cost: ¥2,550,000)
Keywordsテラヘルツ波 / ビームステアリング / アンテナ / 導波路 / 広帯域化 / トポロジー最適化 / ルネベルクレンズ
Outline of Research at the Start

周波数0.3THz以上のテラヘルツ波の指向性ビームを高速走査する原理を確立する。近年、テラヘルツ帯の半導体技術が整備され始め、超高速無線通信や非破壊検査など様々な応用が視野に入ってきている。今後の応用に向けては、これまで盛んに取り組まれてきた送受信器の研究に加えて、キャリアあるいはプローブとなる波動をスマートに空間伝送する技術が不可欠となる。しかし、実用的なフェーズシフタが存在していないテラヘルツ帯のビーム走査は未だ実現困難である。そこで本研究では、中空導体平板間を多重反射伝搬するモードに対する等価屈折率を変調してビーム走査する方法を世界に先駆けて提案し、将来の通信や計測の技術基盤を構築する。

Outline of Final Research Achievements

In this study, we have proposed and demonstrated a terahertz beam steering method based on the control of the equivalent refractive index distribution for a waveguide mode propagating between hollow conductor plates with multiple reflection. Based on the proposed method, we have shown that leaky-wave beams in the 300 GHz band can be steered in two axes by combining refractive index gradient and frequency sweep. We have also designed, fabricated, and demonstrated a refractive index distribution that compensates for frequency dispersion in the structure based on topology optimization enabling broadband operation.

Academic Significance and Societal Importance of the Research Achievements

提案したビーム走査方法では、導体壁面に垂直な電場が存在しないため壁面電流による伝送損失が抑えられ、また中空であるため誘電損失も生じず、低損失な実装が可能となる。ビーム指向性の制御から検波までの処理を導波構造ベースで行えるようにしたことで、将来の100Gbps級の無線通信やサブミリ分解能のレーダー計測の技術基盤を確立した。

Report

(4 results)
  • 2022 Annual Research Report   Final Research Report ( PDF )
  • 2021 Annual Research Report
  • 2020 Annual Research Report
  • Research Products

    (11 results)

All 2023 2022 2021 2020 Other

All Journal Article (3 results) (of which Int'l Joint Research: 1 results,  Peer Reviewed: 3 results,  Open Access: 2 results) Presentation (6 results) (of which Int'l Joint Research: 3 results,  Invited: 3 results) Book (1 results) Remarks (1 results)

  • [Journal Article] Terahertz Beam Steering: from Fundamentals to Applications2023

    • Author(s)
      Monnai Yasuaki、Lu Xuyang、Sengupta Kaushik
    • Journal Title

      Journal of Infrared, Millimeter, and Terahertz Waves

      Volume: 44 Issue: 3-4 Pages: 169-211

    • DOI

      10.1007/s10762-022-00902-1

    • Related Report
      2022 Annual Research Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] Two-Dimensional Terahertz Beam Steering Based on Trajectory Deflection of Leaky-Mode2021

    • Author(s)
      Sato Kazuto、Monnai Yasuaki
    • Journal Title

      IEEE Transactions on Terahertz Science and Technology

      Volume: 11 Issue: 6 Pages: 676-683

    • DOI

      10.1109/tthz.2021.3108392

    • Related Report
      2021 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Sub-terahertz vortex beam generation using a spiral metal reflector2021

    • Author(s)
      Hira Yumina、Monnai Yasuaki
    • Journal Title

      Optics Express

      Volume: 29 Issue: 15 Pages: 24118-24118

    • DOI

      10.1364/oe.430805

    • Related Report
      2021 Annual Research Report
    • Peer Reviewed / Open Access
  • [Presentation] Broadband Terahertz Wavefront Engineering Based On Topology Optimization Of Refractive Index In Non-Dielectric Structures2022

    • Author(s)
      Shinya Nishijima and Yasuaki Monnai
    • Organizer
      47th International Conference on Infrared, Millimeter, and Terahertz Waves (IRMMW-THz) 2022
    • Related Report
      2022 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Point-to-Point Transmission of In-Plane Terahertz Beams between Conducting Plates for Integrated Sensing Platform2022

    • Author(s)
      Ayumi Fukami and Yasuaki Monnai
    • Organizer
      47th International Conference on Infrared, Millimeter, and Terahertz Waves (IRMMW-THz) 2022
    • Related Report
      2022 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Polarization Insensitive Sub-Terahertz Vortex Beam Generator Using Spiral Metal Reflector2021

    • Author(s)
      Yumina Hira and Yasuaki Monnai
    • Organizer
      46th International Conference on Infrared, Millimeter, and Terahertz Waves (IRMMW-THz) 2021
    • Related Report
      2021 Annual Research Report
    • Int'l Joint Research
  • [Presentation] テラヘルツレーダーの集積的実現と非接触身体情報計測への応用2020

    • Author(s)
      門内靖明
    • Organizer
      Microwave Workshops & Exhibition MWE 2020
    • Related Report
      2020 Annual Research Report
    • Invited
  • [Presentation] 集積型テラヘルツレーダーの実現とその非接触身体情報計測への応用2020

    • Author(s)
      門内靖明
    • Organizer
      テラヘルツ波科学技術と産業開拓第182 委員会
    • Related Report
      2020 Annual Research Report
    • Invited
  • [Presentation] 集積型テラヘルツレーダーの実現と非接触身体情報計測への応用2020

    • Author(s)
      門内靖明
    • Organizer
      テラヘルツシステム応用推進協議会
    • Related Report
      2020 Annual Research Report
    • Invited
  • [Book] テラヘルツ波産業創成の課題と展望2022

    • Author(s)
      斗内政吉
    • Total Pages
      317
    • Publisher
      シーエムシー出版
    • ISBN
      9784781316628
    • Related Report
      2022 Annual Research Report
  • [Remarks] Information Somatics Lab Projects

    • URL

      https://star.rcast.u-tokyo.ac.jp/category/project/

    • Related Report
      2022 Annual Research Report

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Published: 2020-04-28   Modified: 2024-01-30  

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