Title :
Modeling Radio Transmission Loss in Curved, Branched and Rough-Walled Tunnels With the ADI-PE Method
Author :
Martelly, Richard ; Janaswamy, Ramakrishna
Author_Institution :
Dept. of Electr. & Comput. Eng., Univ. of Massachusetts, Amherst, MA, USA
fDate :
6/1/2010 12:00:00 AM
Abstract :
We discuss the use of the parabolic equation (PE) along with the alternate direction implicit (ADI) method in predicting the loss for three specialized tunnel cases: curved tunnels, branched tunnels, and rough-walled tunnels. This paper builds on previous work which discusses the use of the ADI-PE in modeling transmission loss in smooth, straight tunnels. For each specialized tunnel case, the ADI-PE formulation is presented along with necessary boundary conditions and tunnel geometry limitations. To complete the study, examples are presented where the ADI-PE numerical results for the curved and rough-walled tunnel are compared to known analytical models and experimental data, and the branched tunnel data is compared to the numerical solutions produced by HFSS.
Keywords :
parabolic equations; radiowave propagation; tunnels; ADI-PE Method; alternate direction implicit method; branched tunnels; curved tunnels; parabolic equation; radio transmission loss; rough-walled tunnels; tunnel geometry limitations; Analytical models; Boundary conditions; Equations; Finite difference methods; Finite wordlength effects; Geometry; Helium; Permission; Propagation losses; Radiowave propagation; Roads; Alternate direction implicit (ADI); parabolic equation; radiowave propagation; tunnels;
Journal_Title :
Antennas and Propagation, IEEE Transactions on
DOI :
10.1109/TAP.2010.2046862
