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2013-09-25
An Introduction to a Medium Frequency Propagation Characteristic Measurement Method of a Transmission Line in Underground Coal Mines
By
Progress In Electromagnetics Research B, Vol. 55, 131-149, 2013
Abstract
An underground coal mine medium frequency (MF) communication system generally couples its electromagnetic signals to a long conductor in a tunnel, which acts as a transmission line, and exchanges signals with transceivers along the line. The propagation characteristics of the transmission line, which is usually the longest signal path for an MF communication system, play a major role in determining the system performance. To measure the MF propagation characteristics of transmission lines in coal mine tunnels, a method was developed based on a basic transmission line model. The method will be presented in this paper along with the propagation measurements on a transmission line system in a coal mine using the method. The measurements confirmed a low MF signal power loss rate, and showed the influence of the electrical properties of surrounding coal and rock on the MF propagation characteristics of the line.
Citation
Jingcheng Li, Joseph Waynert, and Bruce G. Whisner, "An Introduction to a Medium Frequency Propagation Characteristic Measurement Method of a Transmission Line in Underground Coal Mines," Progress In Electromagnetics Research B, Vol. 55, 131-149, 2013.
doi:10.2528/PIERB13073006
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