Wireless MF communication system.
Pittsburgh, PA: U.S. Department of the Interior, Bureau of Mines, Contract H0308004, 1980 Sep; :1-39
This report adds to the current body of underground communication system design knowledge by: 1. accurately defining (measuring) the 12 dB SINAD sensitivity of the system receivers and then starting the equivalent magnetic field strength (Hs) in uA/m; 2. showing that when a passageway repeater is used in loop to loop via the line communication link that the received signal level dependence on line current is only at the first power of distance; and, 3. maximizing the transmit moment is extremely important in the design of the transmit antenna network.
Mining-industry; Mining-equipment; Underground-mining; Electromagnetic-energy; Electromagnetic-fields; Electromagnetic-interference; Electromagnetic-radiation; Statistical-analysis; Coal-mining; Metal-mining; Nonmetal-mining; Radio-waves
Pittsburgh, PA: U.S. Department of the Interior, Bureau of Mines, Contract H0308004
A. R. F. Products, Inc.