Leaky coaxial cables are influenced by environmental conditions, particularly where their coupling loss is small. Transmission loss increases as the cable is installed closer to a concrete wall. Coupling loss changes according to the extension of the cable in a range of about 8 db. The influence on the cable performance of installation conditions was studied under the leadership of the Japan railway construction public corporation in a test which was carried out along the sound insulation walls of the experimental line for the shinkansen (nation-wide railway network). The test cables were installed above the wall, in the pipe, on the wall, and beside the wall. It was also confirmed that rain or snow hardly affects the performance. Hitachi cable, ltd. Developed an antenna which was confirmed to effectively reduce the coupling loss and fluctuations of received signal level. This antenna has a horizontal pattern oriented in the radiation direction of the leaky coaxial cables. (A) /TRRL/

  • Availability:
  • Corporate Authors:

    Hitachi Limited, Publications Department

    Nippon Bldg, #6-2, 2-chome Ohtemachi, Chiyoda-ku
    Tokyo 100,   Japan 
  • Authors:
    • Okada, S
    • Watanabe, Naoto
    • Watari, T
  • Publication Date: 1975

Media Info

  • Features: Figures; Photos; References; Tables;
  • Pagination: p. 109-114
  • Serial:

Subject/Index Terms

Filing Info

  • Accession Number: 00134059
  • Record Type: Publication
  • Source Agency: Transport and Road Research Laboratory (TRRL)
  • Files: ITRD, TRIS
  • Created Date: Aug 23 1976 12:00AM