Title :
Radiocommunication in mines and tunnels
Author_Institution :
National Coal Board Mining Research & Development Establishment, Burton-on-Trent, UK
Abstract :
The transmission-line or `leaky-feeder¿ principle for propagating radio signals in tunnels is being studied and developed to provide the extended range necessary in large coal mines. Findings so far have enabled a prototype 2-way system to be engineered, and the techniques have application to other long tunnels.
Keywords :
mixing; radiocommunication;
Journal_Title :
Electronics Letters
DOI :
10.1049/el:19700392
