A system for measuring through-the-earth radio propagation.
Sunderman-C; Yan-L; Whisner-B; Waynert-J
2014 IEEE Antennas and Propagation Society International Symposium, APSURSI 2014, United States. Washington, DC: IEEE Antennas and Propagation Society, 2014 Sep; :922-923
A measurement system used in through-the-earth magnetic field signal attenuation measurements is described. In addition, an associated calibration system for determining the magnetic antenna factor of a receive antenna is also described. Attenuation data at frequencies ranging from 300 to 3000 Hz was collected at an active coal mine with 201 m of overburden using the system. Results suggest that the data collected fits existing analytical models. Use of this system assists researchers by validating Through-the-earth (TTE) models and increases our understanding of the performance limitations of TTE systems.
Mining-industry; Underground-mining; Signaling-systems; Environmental-factors; Magnetic-fields; Measurement-equipment; Electrophysiological-measurements; Environmental-technology; Equipment-reliability; Performance-capability; Electrical-conductivity; Sound-attenuation; Noise-frequencies; Noise-measurement; Communication-systems; Analytical-models; Models
2014 IEEE Antennas and Propagation Society International Symposium, APSURSI 2014, July 6 - 11, 2014, Memphis, Tenessee