Title :
Comments on the hybrid model for propagation loss prediction in tunnels
Author :
Ahmed, Bazil Taha ; Ramón, Miguel Calvo ; de Haro Ariet, L.
Author_Institution :
Dept. Sistemas, Univ. Politecnica de Madrid, Spain
Abstract :
The hybrid model for propagation-loss prediction in tunnels is discussed and its limitations are given. The values from the waveguide model with γ2<2 are applicable for only short distances and for tunnels with low specific attenuation factor (α). In general, γ2 can take any value higher than two.
Keywords :
UHF radio propagation; microcellular radio; waveguide theory; electromagnetic propagation; hybrid model; propagation loss prediction; specific attenuation factor; tunnels; waveguide model; Attenuation; Electromagnetic modeling; Electromagnetic propagation; Electromagnetic waveguides; Electronic mail; Frequency; Microcell networks; Predictive models; Propagation losses; Telecommunications;
Journal_Title :
Antennas and Propagation Magazine, IEEE
DOI :
10.1109/MAP.2003.1252819
