Title :
Floquet-modes enhanced ray-tracing procedure for field prediction in a railway reinforced concrete tunnel
Author :
Bernardi, Paolo ; Caratelli, Diego ; Cicchetti, Renato ; Mastronardi, Federico ; Pelosi, Giuseppe ; Riminesi, Cristiano ; Selleri, Stefano ; Testa, Orlandino
Author_Institution :
DIE, Rome Univ. "La Sapienza", Italy
Abstract :
The analysis of high-frequency propagation of radio signals inside a railroad tunnel is of great importance for broadband channel characterization and for the design of suitable devices allowing wireless communication to be maintained when a train is in the tunnel. Reinforced concrete walls often present periodic distributions of steel bars, which can be efficiently analyzed by means of Floquet theory. This theory is used in conjunction with a ray-tracing algorithm to realize an accurate numerical field prediction tool. Some preliminary results for the enhancement of beam-tracing software by exploiting an accurate FEM-based reflection coefficient are presented.
Keywords :
computational electromagnetics; finite element analysis; periodic structures; radiowave propagation; ray tracing; reinforced concrete; walls; FEM-based reflection coefficient; Floquet theory; Floquet-mode enhanced ray-tracing procedure; beam-tracing software; broadband channel characterization; computational model; electromagnetic field distribution; field prediction; high-frequency radio propagation; numerical field prediction tool; periodic distributions; railroad tunnel; railway tunnel; reinforced concrete tunnel; Artificial satellites; Bars; Concrete; Frequency; Rail transportation; Ray tracing; Reflection; Satellite broadcasting; Steel; Wireless communication;
Conference_Titel :
Antennas and Propagation Society International Symposium, 2005 IEEE
Print_ISBN :
0-7803-8883-6
DOI :
10.1109/APS.2005.1551441
