• DocumentCode
    918593
  • Title

    Radio Communication in Tunnels

  • Author

    Chiba, Jiro ; Inaba, Tatsuo ; Kuwamoto, Yoshitomo ; Banno, Osamu ; Sato, Risaburo

  • Volume
    26
  • Issue
    6
  • fYear
    1978
  • fDate
    6/1/1978 12:00:00 AM
  • Firstpage
    439
  • Lastpage
    443
  • Abstract
    The attenuation constant of radio waves in tunnels was obtained experimentally and theoretically. According to this study, the tunnel is a transmission channel of high-pass type. It is found that the higher the frequency, the smaller the attenuation constant. The experimental values of attenuation constants are similar to the theoretical values of the the TE01 and EH11 and modes when the tunnel is regarded as a circular waveguide with the same cross-sectional area as the tunnel. Radio communication using the tunnel was proven to be fully possible in spite of the standing wave effects due to the interference of the propagation modes.
  • Keywords
    Antenna measurements; Antennas and propagation; Attenuation measurement; Communication systems; Dipole antennas; Electromagnetic waveguides; Iron; Radio communication; Transmitting antennas; Waveguide theory;
  • fLanguage
    English
  • Journal_Title
    Microwave Theory and Techniques, IEEE Transactions on
  • Publisher
    ieee
  • ISSN
    0018-9480
  • Type

    jour

  • DOI
    10.1109/TMTT.1978.1129409
  • Filename
    1129409
    • Link To Document
    https://search.isc.ac/dl/search/defaultta.aspx?DTC=49&DC=918593