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Technical Services for Mine Communications Research - Task B, Task Order No. 1 - Applicability of State-of-the-art Repeaters for Wireless Mine Communication.

Ginty-JJ; Lagace-RL; Martin-PG
NTIS: PB/249-830 Available for Reference At Bureau Libraries :77 pages
The applicability of state-of-the-art repeaters to wireless communication in U.S. coal mines is investigated. Requirements, environment, and system design factors are described. Present f1/f1 and f1/f2 repeater technology and equipment in the mf to UHF bands are reviewed, and system designs based on these are formulated and compared for use in coal mines. F1/f2-type radio repeater systems are presently the most practical for U.S. mine applications. F1/f2 equipment is commercially available in the HF, VHF, and UHF bands, but not below 25 mhz. Although no off-the-shelf repeater equipment presently meets all mine environmental, safety, and user requirements, available UHF (450 mhz) equipment suitably modified, presently offers the most promise for providing wireless communication coverage compatible with the needs of both working sections and haulages. Repeater systems using radiating coaxial cables offer a practical alternative for radio coverage along haulageways. Recommendations are made for the installation, test, and evaluation of a prototype system using modified, commercially available UHF equipment in an operating mine.
Publication Date
Document Type
CP; Final Contract Report;
Fiscal Year
NTIS Accession No.
NTIS Price
Identifying No.
OFR 20(2)-76
NIOSH Division
Source Name
NTIS: PB/249-830 Available for Reference At Bureau Libraries
Performing Organization
Arthur D. Little, Inc.