Underground mines wireless propagation modeling

In view of an underground mines wireless LAN networks implementation in a real gold mine in Val-d´Or, Northen Quebec, Canada, propagation loss measurements were taken at 18 GHz. These results are reported and compared with a newly introduced method based on a cascade of impedances analogy. Significant statistical, analytical and numerical parameters for wireless communication such as rough sidewalls impedances, reflection coefficients, impulse response, fast fading and attenuation loss due to the direct and multipath components are reported and discussed.