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2007 Fiscal Year Final Research Report Summary

Study of s 40dBi gain waveguide-type planar antenna of simple structure with 90% efficiency at 100GHz

Research Project

Project/Area Number 17360175
Research Category

Grant-in-Aid for Scientific Research (B)

Allocation TypeSingle-year Grants
Section一般
Research Field Communication/Network engineering
Research InstitutionTokyo Institute of Technology

Principal Investigator

HIROKAWA Jiro  Tokyo Institute of Technology, Graduate School of Science and Engineering, Associate Professor (00228826)

Co-Investigator(Kenkyū-buntansha) ANDO Makoto  Tokyo Institute of Technology, Graduate School of Science and Engineering, Professor (90159533)
HIRANO Takuichi  Tokyo Institute of Technology, Graduate School of Science and Engineering, Assistant professor (60345361)
Project Period (FY) 2005 – 2007
Keywordsinformation communication technology / advanced communication / injection molding / precision component fabrication / algorithm / antenna / center feed / alternating-phase feed
Research Abstract

We fabricate the single-layer slotted waveguide array antenna by diffusion bonding of laminated thin metal plates at 94GHz. We expect to reduce the fabrication cost in comparison with conventional die-casting because we etch only three patterns for the slotted plate, the groove feeding structure and the base plate with an input aperture. This fabrication method can be applied to conventional complicated structures of double layers. We achieve 45% efficiency for 30dBi gain in the first fabrication. Unfortunately we have no time to expand this method to a 40dBi gain antenna.
We fabricate a 25mm-long straight waveguide at 94GHz by laser-hardening epoxy resin and by plating nickel. We expect to fabricate a complicated three-dimensional structure by one body seamlessly for reducing the connecting loss. We achieve 0.8dB transmission loss which is comparable to a conventional standard metal waveguide.
We put a 45mm-square-wide 0.4mm-thickness air layer in a 0.9mm-thickness copper-clad PTFE substrate. We expect to reduce the transmission loss by 40% in comparison with a conventional dielectric full-filled substrate. We also design the circuit to excite a TEM wave in the partially-filled substrate.

  • Research Products

    (8 results)

All 2008 2007 Other

All Journal Article (6 results) (of which Peer Reviewed: 2 results) Presentation (2 results)

  • [Journal Article] A Lightweight Radial Line Slot Antenna with Honeycomb Structure for Space Use2008

    • Author(s)
      Hideki Ueda, Jiro Hirokawa, Makoto Ando, Osamu Amano and Yukio Kamata
    • Journal Title

      IEICE Trans. Commun. 91

      Pages: 871-877

    • Description
      「研究成果報告書概要(和文)」より
    • Peer Reviewed
  • [Journal Article] A Lightweight Radial Line Slot Antenna with Honeycomb S tructure for Space Use2008

    • Author(s)
      Hideki, Ueda, Jiro, Hirokawa, Makoto, Ando, Osamu, Amano, Yukio, Kamata
    • Journal Title

      IEICE Trans. Commun. 90

      Pages: 871-877

    • Description
      「研究成果報告書概要(欧文)」より
  • [Journal Article] Reduction of Azimuthal Amplitude Ripple in the Rotating-Mode Feed to a Radial Waveguide by Using a Crossed Dog-Bone Slot2007

    • Author(s)
      Kaoru Sudo, Toru Oizumi, Jiro Hirokawa and Makoto Ando
    • Journal Title

      IEEE Trans. Antennas & Propagat. 55

      Pages: 2618-2622

    • Description
      「研究成果報告書概要(和文)」より
    • Peer Reviewed
  • [Journal Article] Reduction of Azimuthal Amplitude Ripple in the Rotating-Mode Feed to a Radial Waveguide by Using a Crossed Dog-Bone Slot2007

    • Author(s)
      Kaoru, Sudo, Toni, Oizumi, Jiro, Hirokawa, Makoto, Ando
    • Journal Title

      IEEE Trans. Antennas & Propagat 55

      Pages: 2618-2622

    • Description
      「研究成果報告書概要(欧文)」より
  • [Journal Article] A Cost-Effective Transition between a Microstrip Line and a Post-Wall Waveguide using a Laminated LTCC Substrate in 60-GHz Band2007

    • Author(s)
      Kai, Takafumi, Jiro, Hirokawa, Makoto, Ando, Hiroshi, Nakano, Yasutake, Hirachi
    • Journal Title

      IEICE Trans. Electron 90

      Pages: 407-410

    • Description
      「研究成果報告書概要(欧文)」より
  • [Journal Article] A Cost-Effective Transition between a Microstrip Line and a Post-Wall Waveguide using a Laminated LTCC Substrate in 60-GHz Band

    • Author(s)
      Takafumi Kai, Jiro Hirokawa, Makoto Ando, Hiroshi Nakano, Yasutake Hirachi
    • Journal Title

      IEICE Trans. Electron

    • Description
      「研究成果報告書概要(和文)」より
  • [Presentation] A Linear Array of Transverse Slots on a Hollow Waveguide with a Layer of Parasitic Dipole-Quartets for Sidelobe Suppression2007

    • Author(s)
      Jiro Hirokawa
    • Organizer
      Asia Pasific Microwave Conf.
    • Place of Presentation
      Grand Hyatt Erawan Bangkok Hotel
    • Year and Date
      2007-12-14
    • Description
      「研究成果報告書概要(和文)」より
  • [Presentation] A LinearArray of Transverse Slots on a Hollow Waveguide with a Layer of Parasitic Dipole-Quartets for Sidelobe Suppression2007

    • Author(s)
      Jiro, Hirokawa
    • Organizer
      Asia Pasific Microwave Conf
    • Place of Presentation
      Grand Hyatt Erawan Bangkok Hotel
    • Year and Date
      2007-12-14
    • Description
      「研究成果報告書概要(欧文)」より

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Published: 2010-02-04  

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