Title :
Subway tunnel guided electromagnetic wave propagation at mobile communications frequencies
Author :
Didascalou, Dirk ; Maurer, Jürgen ; Wiesbeck, Werner
Author_Institution :
Inst. fur Hochstfrequenztech. und Elektronik, Karlsruhe Univ., Germany
fDate :
11/1/2001 12:00:00 AM
Abstract :
A measurement campaign has been carried out in the Berlin subway to characterize electromagnetic wave propagation in underground railroad tunnels. The received power levels at 945 and 1853.4 MHz are used to evaluate the attenuation and the fading characteristics in a curved arched-shaped tunnel. The measurements are compared to ray-optical modeling results, which are based on ray density normalization. It is shown that the geometry of a tunnel, especially the cross-sectional shape and the course, is of major impact on the propagation behavior and thus on the accuracy of the modeling, while the material parameters of the building materials have less impact
Keywords :
UHF radio propagation; attenuation measurement; cellular radio; electromagnetic wave absorption; land mobile radio; ray tracing; waveguide theory; 1853.4 GHz; 945 MHz; Berlin subway; GSM1800 frequency band; GSM900 frequency band; UHF; attenuation characteristics; building materials; cross-sectional shape; curved arched-shaped tunnel; fading characteristics; guided electromagnetic wave propagation; material parameters; measurement campaign; mobile communications frequencies; modeling accuracy; ray density normalization; ray-optical modeling; received power levels; subway tunnel guided EM wave propagation; tunnel geometry; underground railroad tunnels; Attenuation; Building materials; Density measurement; Electromagnetic measurements; Electromagnetic propagation; Fading; Geometry; Shape; Solid modeling; Waveguide theory;
Journal_Title :
Antennas and Propagation, IEEE Transactions on
