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2006 Fiscal Year Final Research Report Summary

Investigation on an enhanced S/N array antenna system applied to the battery-free wireless capsule endoscope within a CCD camera

Research Project

Project/Area Number 16560321
Research Category

Grant-in-Aid for Scientific Research (C)

Allocation TypeSingle-year Grants
Section一般
Research Field Communication/Network engineering
Research InstitutionIbaraki University

Principal Investigator

KAGOSHIMA Kenichi  Ibaraki University, The College of Engineering, Professor, 工学部, 教授 (70292472)

Co-Investigator(Kenkyū-buntansha) OBOTE Shigeki  Ibaraki University, The College of Engineering, Associate Professor, 工学部, 助教授 (50323209)
Project Period (FY) 2004 – 2006
KeywordsAntenna / Array antenna / Mutual coupling / Maximum directivity / Maximum received power / Element matched load / Reciprocity of directive patterns / CCD
Research Abstract

The purpose of this research work was to improve the performance of wireless capsule endoscopes by adaptive array antenna technologies. Quality of transmitted inner body images can be improved by array antenna technologies and this is also effective to suppress the negative effects by inner body muscle and bone. Especially, the most important research problem is how to determine antenna allocation and their variable antenna weights.
We have established the theoretical model of a receiving array antenna system considering mutual coupling effect. Furthermore the comparative study between the array antenna with maximum receiving power and the array antenna with maximum transmitting directivity gain has been performed. The weights of the array antenna with maximum receiving power were determined based on Minimum Mean Square Error (MMSE) criteria. By the comparative study, we have arrived at the necessary condition which is required in closely spaced adaptive array antennas.
Furthermore, we have chosen Tapped Delay Line-Adaptive Array Antenna (TDL-AAA) as the most suitable adaptive array antenna system because TDL-AAA is a spacial and temporal equalizer. This equalizer is very effective to reduce the number of antenna elements under a dense multipath environment. We have derived the required number of antenna elements and tap stages based on the zero forcing criteria.

  • Research Products

    (12 results)

All 2007 2006 2005

All Journal Article (11 results) Book (1 results)

  • [Journal Article] 受信アレーアンテナの素子整合負荷決定法2007

    • Author(s)
      鹿子嶋 憲一, 田中 崇行, 尾保手 茂樹, 市川 佳弘
    • Journal Title

      電子情報通信学会論文誌B vol. J90-B

      Pages: 543-546

    • Description
      「研究成果報告書概要(和文)」より
  • [Journal Article] Determination method for matched load impedance of a receiving array antenna2007

    • Author(s)
      K.Kagoshima, T.Tanaka, S.Obote, Y.Ichikawa
    • Journal Title

      IEICE Trans on Com. B vol.J90-B

      Pages: 543-546

    • Description
      「研究成果報告書概要(欧文)」より
  • [Journal Article] Study on the reciprocity for the maximum directive gains of a transmitting array and a receiving array2006

    • Author(s)
      K.Kagoshima, S.Obote
    • Journal Title

      Proc. EuCAP 2006

    • Description
      「研究成果報告書概要(和文)」より
  • [Journal Article] Study on the reciprocity for the maximum directive gains of a transmitting array and a receiving array,2006

    • Author(s)
      K.Kagoshima, S.Obote
    • Journal Title

      Proc.EuCAP 2006, Nice, France

    • Description
      「研究成果報告書概要(欧文)」より
  • [Journal Article] Dual-mode space-temporal simultaneous processing equalizer2005

    • Author(s)
      Y.Ichikawa, S.Obote, K.Kagoshima
    • Journal Title

      Kluwer Academic Publishers, Wireless Personal Communications vol. 35, no. 4

      Pages: 353-364

    • Description
      「研究成果報告書概要(和文)」より
  • [Journal Article] Pattern synthesis of and array antenna with maximum directivity and nulls at specified directions2005

    • Author(s)
      K.Kagoshima, S.Obote, Y.Ichikawa, M.Yamane, T.Tanaka
    • Journal Title

      Fifth Int. Conf. on Antenna Theory and Techniques (ICATT'05)

      Pages: 18-22

    • Description
      「研究成果報告書概要(和文)」より
  • [Journal Article] A design methodology of a tapped delay line adaptive array antenna2005

    • Author(s)
      S.Obote, Y.Ichikawa, K.Kagoshima
    • Journal Title

      IEEE Proceeding of APS2005 vol. 4A

      Pages: 30-33

    • Description
      「研究成果報告書概要(和文)」より
  • [Journal Article] Study on the design of maximum directivity of a receiving array with mutual coupling2005

    • Author(s)
      K.Kagoshima, S.Obote, Y.Ichikawa, M.Yamane
    • Journal Title

      Proceeding of ISAP2005 TE3-3

      Pages: 569-572

    • Description
      「研究成果報告書概要(和文)」より
  • [Journal Article] Dual-mode space-temporal simultaneous processing equalizer2005

    • Author(s)
      Y.Ichikawa, S.Obote, K.Kagoshima
    • Journal Title

      Kluwer Academic Publishers, Wireless Personal Communications vol.35, no.4

      Pages: 353-364

    • Description
      「研究成果報告書概要(欧文)」より
  • [Journal Article] Pattern synthesis of and array antenna with maximum directivity and nulls at specified directions2005

    • Author(s)
      K.Kagoshima, S.Obote, Y.Ichikawa, M.Yamane, T.Tanaka
    • Journal Title

      Fifth Int. Conf. on Antenna Theory and Techniques (ICATT '05) in Kiev, Ukraine

      Pages: 18-22

    • Description
      「研究成果報告書概要(欧文)」より
  • [Journal Article] Study on the design of maximum directivity of a receiving array with mutual coupling2005

    • Author(s)
      K Kagoshima, S.Obote, Y.Ichikawa, M.Yamane
    • Journal Title

      Proceeding of ISAP2005, Seoul, Korea TE3-3

      Pages: 569-572

    • Description
      「研究成果報告書概要(欧文)」より
  • [Book] エヌ・アィー・エス2006

    • Author(s)
      鹿子嶋憲一, 尾保手茂樹
    • Total Pages
      1.1.2.2
    • Publisher
      次世代ICタグ
    • Description
      「研究成果報告書概要(和文)」より

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Published: 2008-05-27  

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