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Journal of Applied Sciences
Year: 2009  |  Volume: 9  |  Issue: 16  |  Page No.: 2887 - 2896

Radio Coverage inside Tunnel Utilizing Leaky Coaxial Cable Base Station

F. Sayadi, M. Ismail, N. Misran and K. Jumari    

Abstract: In this study, tunnels radio coverage utilizing leaky coaxial cable has been described. This cable can be deployed as a base station antenna for indoor wireless system such as tunnels. The older type of leaky cables is called coupled mode, while latest type is called radiation mode. These two modes can be distinguished by their radiation pattern, method of radiation (i.e., wave or energy) and class of slot on outer conductor. To obtain the field radiation patterns, we use two models; diffuse and deterministic models. Then a modified ray tracing algorithm has been used and simulated to predict radio coverage in tunnels by leaky cable deployment. Simulations show that leaky cables achieve better RF coverage than distributed antennas in term of received signal level versus frequency for various lengths and cross section of tunnels.

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