Title :
The propagation characteristics of the crank-tunnel with reflectors
Author :
Matsui, Kunio ; Chiba, Jiro
Author_Institution :
Dept. of Eng. Sci., Tohoku Univ., Sendai, Japan
fDate :
11/1/1994 12:00:00 AM
Abstract :
In underground environments, communicability is vital in emergency cases such as fires, as well as in routine management operations. In a disaster, the lines of the wire communication system may be damaged. Therefore, a simple wireless device is necessary for the preservation of public safety. The present study aims at establishing a basis for solving such problems. The authors have analyzed the propagation characteristics of the crank-tunnel. To solve such a boundary value problem, they have introduced the boundary-element method and the surface impedance approximation. Owing to the presence of the reflector, radio communication characteristics in crooked tunnels are improved
Keywords :
boundary-elements methods; boundary-value problems; electromagnetic wave propagation; radiocommunication; radiowave propagation; boundary value problem; boundary-element method; crank-tunnel; crooked tunnels; propagation characteristics; public safety; radio communication characteristics; reflectors; surface impedance approximation; underground environments; Boundary conditions; Boundary value problems; Communication systems; Conductors; Fires; Integral equations; Radio communication; Safety devices; Surface impedance; Wire;
Journal_Title :
Vehicular Technology, IEEE Transactions on
