Premium
Excitation of UHF radio waves in tunnels
Author(s) -
Zhang Y. P.,
Zheng G. X.,
Sheng J. H.
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(19990920)22:6<408::aid-mop12>3.0.co;2-t
Subject(s) - ultra high frequency , antenna (radio) , microwave , non line of sight propagation , reflector (photography) , radio wave , excitation , acoustics , position (finance) , radio frequency , engineering , electrical engineering , physics , optics , telecommunications , wireless , light source , finance , economics
This letter deals with the excitation of UHF radio waves in tunnels. It is found that the antenna position and the antenna gain are two major factors that affect the excitation of radio waves in tunnels. The antenna in the middle position and with high gain is preferable. Furthermore, the enhancement of the radio signal levels in the NLOS region of the tunnel by a passive reflector is simulated. ©1999 John Wiley & Sons, Inc. Microwave Opt Technol Lett 22: 408–410, 1999