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Multi-path propagation models of electromagnetic waves in tunnels are very important in resisting fading and enhancing communication quality. The differences between the wave-guide mode matching theory and ray tracing technology in predicting field were analyzed firstly in this paper, multi-path prediction model of the near-field environment in tunnels is established by using ray-tracing technique,...
According to the surface impedance method, the equations of both monofilar mode and bifilar mode of guided electromagnetic waves in mine tunnels were presented, the distribution of synthesized electromagnetic field in tunnels was given by utilizing image approach. The attenuation constant of monofilar mode in a circular tunnel was solved. The simulation results show that propagation attenuation of...
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