Details

Autor(en) / Beteiligte

• Austin, Brian A.

Titel

Radio communications through rock strata – South African mining experience over 50 years

Ist Teil von

• South African Journal of Science, 2024-03, Vol.120 (3/4), p.1-7

Ort / Verlag

Pretoria: Academy of Science of South Africa

Erscheinungsjahr

2024

Quelle

EZB Electronic Journals Library

Beschreibungen/Notizen

• The pioneering work done in South Africa in developing radio communications technology for use underground in mines is summarised. Propagation took place, in the main, directly through the rock strata with incidental coupling into power cables, pipes, rails and other conductors. The research established the optimum frequencies for communications as well as the most appropriate antennas. Specialised radio equipment was developed for this task as constrained by the technology of the time. Size and weight were major constraints; ultimately, handheld equipment, using single-sideband modulation, was produced that functioned exceptionally well in numerous situations underground.