Details:

Personal Author:
Lagace, Robert L. ;
Corporate Authors:
Arthur D. Little, Inc. ; United States. Bureau of Mines. ;
Arthur D. Little, Inc. ; United States. Bureau of Mines. ; Less -
Description:
"An investigation was made of the feasibility of developing compact transmit antennas and/or other means to efficiently couple very low frequency (VLF) to medium frequency (MF) band radio energy between portable wireless communication units in coal mines. The completely wireless communication range between two portable radios equipped with practical size reference loop antennas in representative coal mine environments was estimated. Antenna technology was assessed with respect to transmit moment, range, intrinsic safety, battery, and wearability requirements to determine the most suitable antenna types for use by miners. It was concluded that aircore bandolier loop antennas, and perhaps ferrite-loaded loop antennas, having peak transmit moments of about 2.5 Ampere/m2 would be the most effective antennas for portable units." - NIOSHTIC-2 NIOSHTIC no. 10001390
Subject:
[+]
Coal Mines And Mining -- Communication Systems.
Mine Communication Systems.
Radio In Mining.
Transmitting Antennas.

Series:
Open file report (United States. Bureau of Mines) ; 92-78;
Document Type:
Report ;
Funding:
Arthur D. Little, Inc., report ADL-77229-Task C, under Bureau of Mines contract H0346045 ;
Collection(s):
National Institute for Occupational Safety and Health
Main Document Checksum:
[+]
urn:sha256:aba0b3f3e40beb22b33fce50c3d3e2288c421ff680d178bdcdace07881f46396
File Type:

Supporting Files

• No Additional Files

More +