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Propagation of UHF radio waves in trapezoidal tunnels
Author(s) -
Zheng G. X.,
Sheng J. H.,
Zhang Y. P.
Publication year - 1999
Publication title -
microwave and optical technology letters
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.304
H-Index - 76
eISSN - 1098-2760
pISSN - 0895-2477
DOI - 10.1002/(sici)1098-2760(19990305)20:5<295::aid-mop4>3.0.co;2-k
Subject(s) - ultra high frequency , microwave , radio propagation , acoustics , radio wave , line of sight propagation , radio propagation model , electrical engineering , radio frequency , engineering , wave propagation , microwave transmission , physics , electronic engineering , telecommunications , optics , ground wave propagation
Abstract Measurements of the propagation of UHF radio waves in two trapezoidal tunnels are reported. Values of propagation loss in dB/100 m are given. It is found that the propagation attenuates at least 900 MHz. In addition, a portable FM radio system operating at 900 MHz is tested in one tunnel. It achieves a highly intelligible communication range of 230 m. ©1999 John Wiley & Sons, Inc. Microwave Opt Technol Lett 20: 295–297, 1999.