Electromagnetic Mode Theory of Periodically-Loaded Oversized Imperfect Waveguide and Its Application to the Propagation of Radio Waves in Long Wall Coal Mining Face Tunnels

Author

Zhang, Y.P. ; Han, Guorui ; Zhang, Wenmei ; Sheng, J.H.

Author_Institution

Sch. of Electr. & Electron. Eng., Nanyang Technol. Univ., Singapore, Singapore

Volume

58

Issue

5

fYear

2010

fDate

5/1/2010 12:00:00 AM

Firstpage

1816

Lastpage

1822

Abstract

A long wall coal mining face tunnel is idealized as a periodically-loaded oversized imperfect rectangular waveguide. A rigorous solution for the electromagnetic field distribution is presented. The theoretical analysis is mainly concentrated on obtaining the characteristic equations for HEM and TE modes and reductions are carried out to obtain the mode equations in a form suitable for the numerical computation. The propagation constant of the TE_m0 mode is computed. The calculated and measured propagation attenuation rates of the dominant TE₁₀ mode are compared for a scaled model. They are in good agreement, showing the validity of the theory.

Keywords

coal; mining industry; radiowave propagation; rectangular waveguides; tunnels; HEM mode; TE mode; electromagnetic field distribution; electromagnetic mode theory; long wall coal mining face tunnel; mode equation; numerical computation; periodically-loaded oversized imperfect rectangular waveguide; propagation constant; radio wave propagation; Attenuation measurement; Electromagnetic fields; Electromagnetic propagation; Electromagnetic scattering; Electromagnetic waveguides; Equations; Propagation constant; Rectangular waveguides; Tellurium; Waveguide theory; Long wall coal mining face tunnels; periodically-loaded imperfect waveguide; propagation of radio waves;

fLanguage

English

Journal_Title

Antennas and Propagation, IEEE Transactions on

Publisher

ieee

ISSN

0018-926X

Type

jour

DOI

10.1109/TAP.2010.2044314

Filename

5422633