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Frequency downconversion and high-sensitivity measurement of millimeter-wave band RF signals with an assistance of optical two-tone signals

Research Project

Project/Area Number 20H02141
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 InstitutionGunma University

Principal Investigator

Chiba Akito  群馬大学, 大学院理工学府, 准教授 (30435789)

Co-Investigator(Kenkyū-buntansha) 呂 国偉  会津大学, コンピュータ理工学部, 上級准教授 (30599709)
坂本 高秀  東京都立大学, システムデザイン研究科, 准教授 (70392727)
Project Period (FY) 2020-04-01 – 2024-03-31
Project Status Completed (Fiscal Year 2023)
Budget Amount *help
¥18,070,000 (Direct Cost: ¥13,900,000、Indirect Cost: ¥4,170,000)
Fiscal Year 2023: ¥910,000 (Direct Cost: ¥700,000、Indirect Cost: ¥210,000)
Fiscal Year 2022: ¥3,900,000 (Direct Cost: ¥3,000,000、Indirect Cost: ¥900,000)
Fiscal Year 2021: ¥4,680,000 (Direct Cost: ¥3,600,000、Indirect Cost: ¥1,080,000)
Fiscal Year 2020: ¥8,580,000 (Direct Cost: ¥6,600,000、Indirect Cost: ¥1,980,000)
KeywordsRFフォトニクス / 光2トーン信号 / RF信号 / 周波数下方変換 / マイクロ波・ミリ波フォトニクス / RFフォトニクス / 光2トーン信号 / RF信号
Outline of Research at the Start

本研究は、第5世代移動通信システム(5G)や自動車用レーダ等の用途で今後利用拡大が見込まれるミリ波帯高周波(RF)信号計測における高確度化の手法に関するもので、高速・高精度の変復調が可能となる光波を介して信号計測の高確度化を図る「光波アシストRF計測」を提案するものである。研究代表者による独自開発の光源の特長も活用し、ミリ波帯デバイスの高周波特性による限界から脱却した信号計測の実証を目指す。

Outline of Final Research Achievements

In this study, we propose "lightwave-assisted radio frequency (RF) signal measurement" for characterizing a millimeter-waveband RF signal. The proposed method is based on high-speed modulation and detection technique of lightwaves, enabled by using an optical modulator with traveling-wave electrode structures and the the features of "an optical two-tone signal source" developed by the Principal Investigator. By developing this approach through both sides of experiments and model analysis, we demonstrate this approach enables us to measure an RF signal with high accuracy, by avoiding the limitations in RF signal characterization caused by characteristics of millimeter-waveband devices in high-frequency region.

Academic Significance and Societal Importance of the Research Achievements

高周波帯RF信号の計測は基本的にその周波数に応答する素子を利用して行われる一方で、当該周波数域において所望の性能を確保することが難しい場合もあり、計測限界の元となっている。本研究で提案する「光波アシストRF計測」は、被測定RF信号により光波を変調して被測定RF信号パラメータを光波に転写し、その光波と基準光波とのビートを検出して転写されたパラメータを抽出するというものである。検出するビート信号の周波数は、元々のRF信号周波数に対して大幅(~数kHz程度)にダウンコンバートされるため、被測定RF信号周波数帯の性能から脱却した信号評価が可能になる。

Report

(5 results)
  • 2023 Annual Research Report   Final Research Report ( PDF )
  • 2022 Annual Research Report
  • 2021 Annual Research Report
  • 2020 Annual Research Report
  • Research Products

    (9 results)

All 2024 2023 2022 2021 Other

All Journal Article (4 results) (of which Peer Reviewed: 4 results,  Open Access: 3 results) Presentation (3 results) (of which Int'l Joint Research: 3 results,  Invited: 2 results) Remarks (2 results)

  • [Journal Article] Multiple-Frequency-Spaced and -Offset Flat Optical Comb Generation Using Multiple-Parallel Phase Modulator: Theory and Design2022

    • Author(s)
      T. Sakamoto, A. Chiba
    • Journal Title

      Journal of the Optical Society of America B

      Volume: 39(6) Issue: 6 Pages: 1644-1654

    • DOI

      10.1364/josab.455652

    • Related Report
      2022 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Wavelength-Tunable Optical Two-Tone Signals Generated Using Single Mach-Zehnder Optical Modulator in Single Polarization-Mode Sagnac Interferometer2022

    • Author(s)
      A.Chiba and Y. Akamatsu
    • Journal Title

      Photonics (MDPI)

      Volume: 9 (3) Issue: 3 Pages: 194-194

    • DOI

      10.3390/photonics9030194

    • Related Report
      2021 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] 光の変調と検波を利用する高周波信号の評価2022

    • Author(s)
      千葉 明人
    • Journal Title

      HiKaLo技術情報誌

      Volume: (in press)

    • Related Report
      2021 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] Complex amplitude estimation of monochromatic radio-frequency signal using frequency down conversion via direct detection of interfered optical phase-modulation signals2021

    • Author(s)
      A. Chiba and Y. Sunaga
    • Journal Title

      Optics Letters

      Volume: 46 Issue: 11 Pages: 2646-2649

    • DOI

      10.1364/ol.426425

    • Related Report
      2020 Annual Research Report
    • Peer Reviewed / Open Access
  • [Presentation] RF parameter estimation assisted by phase modulation and detection of lightwave2024

    • Author(s)
      A. Chiba
    • Organizer
      ICCCAS2024
    • Related Report
      2023 Annual Research Report
    • Int'l Joint Research / Invited
  • [Presentation] RF Parameter Estimation Using Lightwave Modulation2023

    • Author(s)
      A. Chiba
    • Organizer
      ICCCAS2023
    • Related Report
      2023 Annual Research Report
    • Int'l Joint Research / Invited
  • [Presentation] RF signal estimation utilizing low-frequency beat signal due to harmonics of phase-modulation lightwave2022

    • Author(s)
      Akito Chiba and Yusuke Sunaga
    • Organizer
      15th Pacific Rim Conference on Lasers and Electro-Optics (CLEO-PR2022)
    • Related Report
      2022 Annual Research Report
    • Int'l Joint Research
  • [Remarks] Homepage of Akito Chiba

    • URL

      https://chiba.ei.st.gunma-u.ac.jp/

    • Related Report
      2023 Annual Research Report
  • [Remarks] Webpage of Akito Chiba

    • URL

      https://chiba.ei.st.gunma-u.ac.jp/

    • Related Report
      2022 Annual Research Report 2021 Annual Research Report 2020 Annual Research Report

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Published: 2020-04-28   Modified: 2025-01-30  

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