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  2. Koji Tanaka

Koji Tanaka

  (田中 孝治)

Profile Information

Affiliation
Institute of Space and Astronautical Science, Japan Aerospace Exploration Agency
Degree
博士（工学）(Mar, 1999, 新潟大学大学院)
J-GLOBAL ID
202001002293771846
researchmap Member ID
R000013957

Research Interests

 1

Papers

 31
  • Naoki SEKIYA, Takaya NAKAMURA, Tatsuya YAMAGAMI, Kazuyoshi ARAI, Koji TANAKA
    Mar, 2021  Corresponding author
  • Mudassir Raza, Koji Tanaka
    Electronics (Switzerland), 10(4) 1-13, Feb 2, 2021  Peer-reviewedLast author
    © 2021 by the authors. Licensee MDPI, Basel, Switzerland. This work presents digital retrodirective method to do microwave power transfer (MPT) for solar power satellite (SPS). Due to space environment, there is concern of antenna deformation, which will affect beam forming. Size of SPS is large and synchronization among antenna modules is difficult. Flexibility regarding frequency selection for MPT is also a requirement for SPS. Digital Retrodirective method determines phase of pilot signal and power signal is transmitted with conjugate phase. Digital Signal Processing (DSP) circuit is used for digital retrodirective method. Experiment is performed without antenna deformation and with antenna deformation cases. Digital retrodirective method performs beam forming without synchronization among antenna modules and corrects effect of antenna deformation successfully. Flexibility for frequency selection is also achieved by the DSP circuit. The presented results confirm that digital retrodirective method is a good candidate for power transfer from SPS.
  • Y. Mando, K. Tanaka, T. Hirai, S. Kawakita, M. Higashide, H. Kurosaki, S. Hasegawa, K. Nitta
    The American Society of Mechanical Engineers, (HVIS2019-019) 495-500, Jun, 2020  Peer-reviewed
  • Takaya Nakamura, Tatsuya Yamagami, Naoki Sekiya, Hiroshi Mizoguchi, Koji Tanaka
    Proceedings of the International Astronautical Congress, IAC, 2020-October, 2020  
    We are studying and developing a hybrid system combined with thin film and bulk structure to realize a solar power satellite (SPS). One of the problems of realization for SPS is the number of space transportation. Therefore, to reduce the number of space transportation, we're considering replacing some functions from a bulk structure with by lightweight and thin flexible structure. Also, to meet temperature requirements, thermal design of hybrid structure for the SPS should be considered. In this study, we found thermal structural conditions of hybrid system combined with thin film and bulk structure for SPS.
  • Budhaditya Pyne, Hirobumi Saito, Prilando Rizki Akbar, Koji Tanaka, Jiro Hirokawa, Takashi Tomura
    2020 50TH EUROPEAN MICROWAVE CONFERENCE (EUMC), 816-819, 2020  
    This paper discusses the near-field measurement results of deployable seven-panel parallel plate slot-array antenna system compatible with 100kg class satellite. This antenna system will be used for SAR image acquisition on-board Synspective Inc.'s first demonstration satellite Strix-Alpha, scheduled to be launched in 2020.
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Misc.

 104
  • 万戸 雄輝, 相馬 央令子, 塩田 一路, 山神 達也, 中村 剛也, 関谷 直樹, 太田 大智, 阿久津 壮希, 長谷川 直, 田中 孝治, MANDO Yuki, SOMA Eriko, SHIOTA Ichiro, YAMAGAMI Tatsuya, NAKAMURA Takaya, SEKIYA Naoki, OTA Daichi, AKUTSU Soki, HASEGAWA Sunao, TANAKA Koji
    令和元年度宇宙科学に関する室内実験シンポジウム 講演集 = Proceedings of 2020 Symposium on Laboratory Experiment for Space Science, Mar, 2020  
    令和元年度宇宙科学に関する室内実験シンポジウムは、新型コロナウイルスの感染拡大防止のため開催中止。すべて書面発表になりました。資料番号: SA6000149001レポート番号: 1
  • Budhaditya Pyne, Hirobumi Saito, Prilando Rizki Akbar, Koji Tanaka, Jiro Hirokawa, Takashi Tomura
    2020 50TH EUROPEAN MICROWAVE CONFERENCE (EUMC), 2020  
  • Budhaditya Pyne, Hirobumi Saito, Prilando Rizki Akbar, Koji Tanaka, Jiro Hirokawa, Takashi Tomura
    2020 50TH EUROPEAN MICROWAVE CONFERENCE (EUMC), 2020  
  • FUJINO Yoshiyuki, YANAGISAWA Yuta, TANAKA Koji
    Space Solar Power Systems, 5 43-48, 2020  
    <p>  At present, a demonstration experiment using small satellites is planned to realize solar power generation (SPS). In the demonstration experiment, it is necessary to accurately evaluate the beam shape transmitted from the satellites. The beam shape was reproduced using a two-dimensional least-squares pattern processing technique. In this paper, we showed that by using this satellite as a LEO and arranging the receiving stations in one dimension, simpler and more accurate measurements can be performed than before.</p>
  • Mando Yuki, Soma Eriko, Shiota Ichiro, Yamagami Tatsuya, Haseba Shuichi, Tanaka Koji
    Feb, 2019  
    2019 Symposium on Laboratory Experiment for Space Science (February 28 - March 1, 2019. Institute of Space and Astronautical Science, Japan Aerospace Exploration Agency (JAXA)(ISAS)), Sagamihara, Kanagawa Japan
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Books and Other Publications

 2

Presentations

 85

Professional Memberships

 4

Research Projects

 7
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● 指導学生等の数

 8
  • Fiscal Year
    2018年度(FY2018)
    Doctoral program
    3
    Master’s program
    1
    Students under Commissioned Guidance Student System
    1
    Students under Skills Acquisition System
    7
  • Fiscal Year
    2019年度(FY2019)
    Doctoral program
    3
    Master’s program
    2
    Students under Cooperative Graduate School System
    1
    Students under Skills Acquisition System
    3
  • Fiscal Year
    2020年度(FY2020)
    Doctoral program
    2
    Master’s program
    2
    Students under Cooperative Graduate School System
    2
    Students under Commissioned Guidance Student System
    2
    Students under Skills Acquisition System
    2
  • Fiscal Year
    2019年度(FY2019)
    Doctoral program
    3
    Master’s program
    2
    Students under Cooperative Graduate School System
    1
    Students under Skills Acquisition System
    3
  • Fiscal Year
    2020年度(FY2020)
    Doctoral program
    2
    Master’s program
    2
    Students under Cooperative Graduate School System
    2
    Students under Commissioned Guidance Student System
    2
    Students under Skills Acquisition System
    2
  • Fiscal Year
    2021年度(FY2021)
    Doctoral program
    2
    Master’s program
    1
    Students under Cooperative Graduate School System
    1
    Students under Commissioned Guidance Student System
    1
    Students under Skills Acquisition System
    3
  • Fiscal Year
    2022年度(FY2022)
    Doctoral program
    1
    Master’s program
    2
    Students under Cooperative Graduate School System
    1
    Students under Commissioned Guidance Student System
    1
    Students under Skills Acquisition System
    4
  • Fiscal Year
    2023年度(FY2023)
    Master’s program
    2
    Students under Cooperative Graduate School System
    1
    Students under Commissioned Guidance Student System
    2
    Students under Skills Acquisition System
    4
    Internship students
    1

● 指導学生の表彰・受賞

 5
  • Student Name
    Daichi Ota
    Student affiliation
    Tokyo University of Science
    Award
    The International Space Solar Power Student Competition Championship
    Date
    2020/10/12-14
  • Student Name
    Naoki Sekiya
    Student affiliation
    Hosei university
    Award
    The Japan Society of Mechanical Engineers三浦賞
    Date
    24,Mar,2021
  • Student Name
    Takaya Nakamura
    Student affiliation
    Tokyo University of Science
    Award
    アイデア大賞、日本天文学会賞、第28回衛星設計コンテスト
    Date
    2020/10/31、2020、10、31
  • Student Name
    岸田　祐輔
    Student affiliation
    法政大学大学院
    Award
    The International Space Solar Power Student Competition 準優勝
    Date
    2022/11/14
  • Student Name
    大西隆宏、金子美稀、東川宗嗣、川合優美、堀部拓海、松友斗夢、割貝直樹
    Student affiliation
    東京理科大学、法政大学、諏訪東京理科大学
    Award
    The International Space Solar Power Student Competition 優勝
    Date
    January 10, 2024

● 専任大学名

 1
  • Affiliation (university)
    総合研究大学院大学（SOKENDAI)

● 所属する所内委員会

 3
  • ISAS Committee
    放射線委員会
  • ISAS Committee
    スペースチャンバ専門委員会
  • ISAS Committee
    化学物質専門部会委員
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