Title :
Characterization of UHF radio propagation channel in curved tunnels
Author :
Zhang, Y.P. ; Hwang, Y. ; Ching, P.C.
Author_Institution :
City Univ. of Hong Kong, Hong Kong
Abstract :
We propose an imperfect waveguide model to represent empty curved tunnels. We use the field configuration in an optical dielectric guide together with the surface impedance boundary condition for the walls to simplify the complexity of derivation of the propagation modal equations. The curvature of the tunnels is assumed to be gentle. Our results show that increased propagation loss is almost linearly proportional to frequency and inversely proportional to the radius of curvature
Keywords :
UHF radio propagation; electric impedance; rectangular waveguides; waveguide theory; UHF radio propagation channel; curved tunnels; imperfect waveguide model; modal equations; optical dielectric guide; propagation loss; rectangular waveguide; surface impedance boundary condition; walls; Boundary conditions; Dielectrics; Equations; Frequency; Optical propagation; Optical surface waves; Optical waveguides; Propagation losses; Surface impedance; UHF propagation;
Conference_Titel :
Personal, Indoor and Mobile Radio Communications, 1996. PIMRC'96., Seventh IEEE International Symposium on
Conference_Location :
Taipei
Print_ISBN :
0-7803-3692-5
DOI :
10.1109/PIMRC.1996.568391
