Professor Emeitus
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  2. zenichi yamamoto

zenichi yamamoto

  (山本 善一)

Profile Information

Affiliation
Professor, Institute of Space and Astronautical Science, Japan Aerospace Exploration Agency
Degree
doctor of engineering(Mar, 1986, The University of Tokyo)
Researcher number
60183985
J-GLOBAL ID
202101015455590273
researchmap Member ID
R000016462

Research Interests

 4

Research Areas

 5

Research History

 4

Education

 3

Committee Memberships

 2

Awards

 1

Major Papers

 29
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Misc.

 35
  • 山本 善一
    RFワールド : 無線と高周波の技術解説マガジン, (24) 75-95,5, Nov, 2013  
  • NOJI Hirofumi, FUKUDA Goh, HORI Masakazu, KOBAYASHI Yuta, FURUTA Shigeki, MORIGUCHI Yukio, YAMAMOTO Zen-ichi, KAWASAKI Shigeo
    Proceedings of the IEICE General Conference, 2012(1) 73-73, Mar 6, 2012  
  • IWATA Takahiro, MAEJIMA Hironori, YONEKURA Katsuhide, NAMIKI Noriyuki, HANADA Hideo, IMAMURA Takeshi, NODA Hirotomo, ASARI Kazuyoshi, YAMAMOTO Zenichi, TANAKA Koji, IIJIMA Yuichi, TAKANO Tadashi
    IEICE technical report, 111(7) 1-6, Apr 14, 2011  
    Selenological and Engineering Explorer is composed of a lunar orbiter 'Kaguya', and two small sub-satellites: Relay Satellite 'Okina' and VRAD Satellite 'Ouna'. It was launched in September 2007, and operated until June 2009. Ground stations for their operations were GN stations of JAXA, Usuda Deep Space Center (UDSC), and foreign stations. Among them, 64m antenna of UDSC executed the downlink of mission data from Kaguya, and the first experiments of 4-way Doppler measurements of lunar orbiter relayed by Okina. We report about the outline of these operations, and the new technology to achieve the 4-way relay link.
  • YAMAMOTO Zen-ichi
    IEICE technical report, 111(7) 25-36, Apr 14, 2011  
    We introduce the Japanese large ground stations (UDS64m/USC34m) for deep space communications.
  • NOJI Hirofumi, HORI Masakazu, SHIBUYA Yasuhiro, ISONO Kosuke, KOBAYASHI Yuta, YAMADA Mitsuo, ISIZAKI Toshio, FURUTA Shigeki, MORIGUCHI Yukio, KAWAI Tadashi, NISHIKAWA Kenjiro, KATO Takaji, YAMAMOTO Zen-ichi, KAWASAKI Shigeo
    IEICE technical report, 111(7) 13-17, Apr 14, 2011  
    A 2.1 GHz 200W GaN high power amplifier unit with a solid-state cooling equipment was fabricated in compact configuration. The four high power amplifier units were combined with a circular waveguide and the output power was obtained with 540W. In the high power amplifier unit, the two package-type GaN amplifiers are connected in parallel. The maximum power of 200W was realized with the Peltier device for heat sink. The high power amplifier unit shows the PAE of more than 50% with the AB-class operation under the temperature around 40 degrees. The combining efficiency of the combiner was achieved with about 80 %.
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Books and Other Publications

 1

Presentations

 32
  • Zen-ichi Yamamoto, Kiyoshi Nakajima, Kuniki Ueno, Mitsuo Yamada, Tomoyuki Shibata
    IEICE Technical Report MIcrowave, Jan 14, 2016
  • NOJI Hirofumi, FUKUDA Goh, HORI Masakazu, KOBAYASHI Yuta, FURUTA Shigeki, MORIGUCHI Yukio, YAMAMOTO Zen-ichi, KAWASAKI Shigeo
    Proceedings of the IEICE General Conference, Mar 6, 2012, The Institute of Electronics, Information and Communication Engineers
  • NOJI Hirofumi, HORI Masakazu, SHIBUYA Yasuhiro, ISONO Kosuke, KOBAYASHI Yuta, YAMADA Mitsuo, ISIZAKI Toshio, FURUTA Shigeki, MORIGUCHI Yukio, KAWAI Tadashi, NISHIKAWA Kenjiro, KATO Takaji, YAMAMOTO Zen-ichi, KAWASAKI Shigeo
    IEICE technical report, Apr 14, 2011, The Institute of Electronics, Information and Communication Engineers
    A 2.1 GHz 200W GaN high power amplifier unit with a solid-state cooling equipment was fabricated in compact configuration. The four high power amplifier units were combined with a circular waveguide and the output power was obtained with 540W. In the high power amplifier unit, the two package-type GaN amplifiers are connected in parallel. The maximum power of 200W was realized with the Peltier device for heat sink. The high power amplifier unit shows the PAE of more than 50% with the AB-class operation under the temperature around 40 degrees. The combining efficiency of the combiner was achieved with about 80 %.
  • YAMAMOTO Zen-ichi
    IEICE technical report, Apr 14, 2011, The Institute of Electronics, Information and Communication Engineers
    We introduce the Japanese large ground stations (UDS64m/USC34m) for deep space communications.
  • IWATA Takahiro, MAEJIMA Hironori, YONEKURA Katsuhide, NAMIKI Noriyuki, HANADA Hideo, IMAMURA Takeshi, NODA Hirotomo, ASARI Kazuyoshi, YAMAMOTO Zenichi, TANAKA Koji, IIJIMA Yuichi, TAKANO Tadashi
    IEICE technical report, Apr 14, 2011, The Institute of Electronics, Information and Communication Engineers
    Selenological and Engineering Explorer is composed of a lunar orbiter 'Kaguya', and two small sub-satellites: Relay Satellite 'Okina' and VRAD Satellite 'Ouna'. It was launched in September 2007, and operated until June 2009. Ground stations for their operations were GN stations of JAXA, Usuda Deep Space Center (UDSC), and foreign stations. Among them, 64m antenna of UDSC executed the downlink of mission data from Kaguya, and the first experiments of 4-way Doppler measurements of lunar orbiter relayed by Okina. We report about the outline of these operations, and the new technology to achieve the 4-way relay link.
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Teaching Experience

 2

Professional Memberships

 1
  • Apr, 1986 - Oct, 1991
    IEICE

Research Projects

 6
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Media Coverage

 2
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