第三世代移動通信の無線中継増幅装置用超電導フロントエンド Cryogenic Front-end Unit for 3rd Generation Mobile Telecommunication Booster System

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In any mobile communications system, there are poorly covered areas where radio waves are weak or cut-off because of transmission obstacles. These obstacles can be effectively eliminated by using economical relay systems, called "boosters", between the base and mobile stations. To incorporate a booster in a W-CDMA system, high sensitivity (low noise) and high selectivity performance are required to expand the coverage and resolve or reduce problems such as interference caused by other systems working at adjacent frequencies or a reduction in user capacity that could be caused by booster transmission noise. To eliminate areas of weak or even no coverage, we found that an open-area relay "booster" system using a cryogenic superconductor front-end is indispensable. This paper presents the feasibility of practical application of a cryogenic front-end for an open-area booster. In our experiment, we made a cryogenic front-end with a pinched-off vacuum vessel and 2-W cryocooler. We used a 17-pole high-temperature superconducting filter (HTSF) and, -achieved 20-dB attenuation only 200 kHz from the band edge, for up-link and down-link input filters.

収録刊行物

  • 低温工学 = Journal of the Cryogenic Society of Japan

    低温工学 = Journal of the Cryogenic Society of Japan 39(6), 264-270, 2004-06-20

    CRYOGENICS AND SUPERCONDUCTIVITY SOCIETY OF JAPAN

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各種コード

  • NII論文ID(NAID)
    10012756976
  • NII書誌ID(NCID)
    AN00333419
  • 本文言語コード
    JPN
  • 資料種別
    ART
  • ISSN
    03892441
  • NDL 記事登録ID
    7014477
  • NDL 雑誌分類
    ZM35(科学技術--物理学)
  • NDL 請求記号
    Z15-388
  • データ提供元
    CJP書誌  NDL  J-STAGE 
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