Modeling radio wave propagation in tunnels with a vectorial parabolic equation

被引:57
|
作者
Popov, AV [1 ]
Zhu, NY
机构
[1] Russian Acad Sci, Inst Terr Magnetism Ionosphere & Radio Wave Propa, Moscow 142190, Russia
[2] Univ Stuttgart, Inst Hochfrequenztech, D-70550 Stuttgart, Germany
关键词
adiabatic modes; radio wave propagation in curved tunnels; three-dimensional (3-D) numerical modeling; vectorial parabolic equation (PE);
D O I
10.1109/8.898773
中图分类号
TM [电工技术]; TN [电子技术、通信技术];
学科分类号
0808 ; 0809 ;
摘要
To study radio wave propagation in tunnels, we present a vectorial parabolic equation (PE) taking into account the cross-section shape, wall impedances, slowly varying curvature, and torsion of the tunnel axis. For rectangular cross section, two polarizations are decoupled and two families of adiabatic modes can be found explicitly, giving a generalization of the known results for a uniform tunnel. In the general case, a boundary value problem arises to be solved by using finite-difference/finite-element (FD/FE) techniques. Numerical examples demonstrate the computational efficiency of the proposed method.
引用
收藏
页码:1403 / 1412
页数:10
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