Abstract
An experimental study of the electromagnetic wave propagation in various tunnels at frequencies between 1 MHz and 1000 MHz is presented. The results provide a better understanding of various propagation mechanisms in underground galleries. The analysis shows the existence of a cutoff frequency, and enables one to distinguish three different ranges of frequency characterized by three different modes of propagation. Experimental verification was made in road and mine tunnels of various shapes and sizes. The results show a strong correlation between the propagation characteristics and the transverse dimensions of the tunnel.
Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
