Research on Propagation Characteristics of Millimeter Wave in Tunnels

This paper analyzes the propagation characteristics of the millimeter wave in various circular section tunnels. The received power, path loss and delay spread are discussed in detail using the verified software of Wireless InSite. The investigated tunnel models with circular section include the long straight tunnel, the tunnel with train inside and the curved tunnels with different curvature. The simulated results are verified by the experimental value in the actual tunnel. Several valuable conclusions are obtained, which would offer theoretical and practical references for the millimeter wave communication in limited spaces.