LEAKY FEEDER RADIO TECHNIQUES FOR MINES AND TUNNELS

Leaky feeder systems should include frequently spaced in-line repeaters for consistent performance and to minimize line and mobile transmitter powers. In the well-established "daisy chain" arrangement of a parallel telephone line is now obviated by a return path through the repeaters at audio or medium radio frequency. The BDR (bi-directional routing) system is also in very successful operational service and an improved version is under trial. Such systems lend themselves to unique diversity arrangements for overcoming multipath effects in tunnels. The use of repeaters rather than multiple base stations is particularly economic in multi-channel operation.

  • Supplemental Notes:
    • IERE Conference Proceedings Supplement to No. 44, Proceedings of the Conference on Land Mobile Radio, University of Lancaster, Bailrigg, England, September 4-6, 1979.
  • Corporate Authors:

    Institution of Electronic and Radio Engineers

    9 Bedford Square
    London WC2B 3RG,   England 
  • Authors:
    • Martin, DJR
    • Haining, R W
  • Publication Date: 1979

Media Info

  • Features: References;
  • Pagination: p. 305-317
  • Serial:

Subject/Index Terms

Filing Info

  • Accession Number: 00322024
  • Record Type: Publication
  • Source Agency: Engineering Index
  • Files: TRIS
  • Created Date: Dec 30 1980 12:00AM