Title :
On the reduction of wave propagation loss in tunnels
Author :
Yamaguchi, Yoshio ; Honda, Takemitsu ; Sengoku, Masakazu ; Motooka, Seiichi ; Abe, Takeo
Author_Institution :
Dept. of Inf. Eng., Niigata Univ., Japan
fDate :
5/1/1992 12:00:00 AM
Abstract :
The reduction of radio wave attenuation in two-dimensional tunnels is discussed. The attenuation of the dominant mode due to its field penetration into the lossy dielectric side wall is reduced by means of the attachment of periodically aligned metallic strips on the wall surface. The electric field distributions in tunnels with and without strips are illustrated to show the effect on the attenuation characteristics. The efficiency of attenuation reduction rate by the metallic-wall stripping method is summarized. The calculation results based on the boundary element analysis are verified by a laboratory experiment
Keywords :
boundary-elements methods; dielectric losses; electromagnetic wave absorption; radiowave propagation; boundary element analysis; dominant mode; electric field distributions; field penetration; lossy dielectric wall; metallic-wall; periodically aligned metallic strips; radio wave attenuation; two-dimensional tunnels; wave propagation loss; Attenuation; Dielectric losses; Dielectric materials; Electromagnetic waveguides; Frequency; Laboratories; Microwave communication; Propagation losses; Radio communication; Strips;
Journal_Title :
Electromagnetic Compatibility, IEEE Transactions on
