Modeling radio wave propagation in tunnels with a vectorial parabolic equation

Author

Popov, Alexei V. ; Zhu, Ning Yan

Author_Institution

Inst. of Terrestrial Magnetism, Ionosphere & Radiowave Propagation, Acad. of Sci., Troitsk, Russia

Volume

48

Issue

9

fYear

2000

fDate

9/1/2000 12:00:00 AM

Firstpage

1403

Lastpage

1412

Abstract

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

Keywords

boundary-value problems; electromagnetic wave polarisation; finite difference methods; finite element analysis; parabolic equations; radiowave propagation; waveguide theory; adiabatic modes; boundary value problem; computational efficiency; cross-section shape; curved EM waveguides; finite-difference/finite-element techniques; modeling; numerical examples; polarizations; radio wave propagation; tunnel axis torsion; tunnels; vectorial parabolic equation; Boundary value problems; Eigenvalues and eigenfunctions; Electromagnetic waveguides; Equations; Finite difference methods; Impedance; Optical propagation; Optical waveguides; Polarization; Shape;

fLanguage

English

Journal_Title

Antennas and Propagation, IEEE Transactions on

Publisher

ieee

ISSN

0018-926X

Type

jour

DOI

10.1109/8.898773

Filename

898773