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A ray tracing method for evaluating field distribution in tunnels

โœ Scribed by Kazunori Uchida; Chang-Kwon Lee; Toshiaki Matsunaga; Tetsuro Imai; Teruya Fujii

Publisher
John Wiley and Sons
Year
2000
Tongue
English
Weight
690 KB
Volume
83
Category
Article
ISSN
8756-6621

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โœฆ Synopsis

This paper is concerned with field estimation by the ray tracing method (RTM) in two-dimensional (2D) tunnels with arbitrary cross section whose dimension is relatively large compared with the wavelength. The tunnel wall is approximated as a combination of plates. We investigate the accuracy of RTM in comparison with a rigorous solution or finite volume time domain (FVTD) solutions. It is shown that RTM provides accurate numerical results for the field distribution in a rectangular tunnel when its dimension is larger than 20O. For the tunnel with a curved wall, such as a circular or semicircular tunnel, it is shown that the radius of curvature should be greater than 20O to obtain accurate numerical results based on RTM.

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