Myria wireless communication. Part 1: System analysis of the practicability of wireless information transmission in mines by electromagnetic ELF waves
Abstract
The feasibility of through-the-ground mine communications was studied theoretically. Experimental results obtained with a prototype mine communication and monitoring system were then analyzed. Calculations of ELF propagation in dissipative media were compared with measurements made in the Ruhr district. The waveform generator station and two mobile receiving sets are described. Magnetic field strength is computed as a function of range; different parameters for several antenna designs are used. A magnetic dipole buried inside a homogeneous medium as well as in stratified media, a loop antenna, and a wire antenna are characterized for noise and frequency response. Communication is possible, using frequencies below 300 Hz.
- Publication:
-
Final Report
- Pub Date:
- December 1981
- Bibcode:
- 1981aegt.reptR....S
- Keywords:
-
- Extremely Low Radio Frequencies;
- Feasibility Analysis;
- Mines (Excavations);
- Wireless Communication;
- Dipole Antennas;
- Electromagnetic Noise Measurement;
- Electromagnetic Wave Transmission;
- Loop Antennas;
- Radio Attenuation;
- Transmission Efficiency;
- Communications and Radar