Title :
Propagation study in urban environment at 25 and 40 GHz
Author :
Moraitis, N.G. ; Constantinou, P.
Author_Institution :
Mobile RadioCommunications Lab., Nat. Tech. Univ. of Athens, Greece
Abstract :
The use of millimetre waves at 25 and 40 GHz for wireless communications appears to be a favourable choice as it provides sufficient bandwidth to support broadband services and high data rates. This paper intends to present issues arising in the design of systems operating in the millimetre region. Transmitter and receiver height variation are found to influence the area coverage significantly. Rain attenuation reduces the available system margin according to the required availability. Real time measurements showed that the rainfall rate does not exceed 39 mm/hr. Maximum gas attenuation is found to be 0.25 dB at 25 GHz and 0.18 dB at 40 GHz, derived also from real time measurements
Keywords :
electromagnetic wave absorption; electromagnetic wave scattering; microwave propagation; millimetre wave propagation; rain; tropospheric electromagnetic wave propagation; 25 GHz; 40 GHz; broadband services; coverage area; dry air absorption; gas attenuation; high data rates; millimetre wave propagation; rain attenuation; receiver height; transmitter height; urban environment; water vapour absorption; wireless communications; Attenuation; Availability; Bandwidth; Base stations; Diffraction; Frequency; Laboratories; Radio transmitters; Rain; Wireless communication;
Conference_Titel :
Vehicular Technology Conference, 2001. VTC 2001 Spring. IEEE VTS 53rd
Conference_Location :
Rhodes
Print_ISBN :
0-7803-6728-6
DOI :
10.1109/VETECS.2001.944852
