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Radio propagation characteristics in curved tunnels

✍ Scribed by Lamminmaki, J.S.; Lempiainen, J.J.A.

Book ID
114454920
Publisher
The Institution of Electrical Engineers
Year
1998
Tongue
English
Weight
510 KB
Volume
145
Category
Article
ISSN
1350-2417

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Propagation of UHF radio waves in trapez
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✍ G. X. Zheng; J. H. Sheng; Y. P. Zhang πŸ“‚ Article πŸ“… 1999 πŸ› John Wiley and Sons 🌐 English βš– 88 KB πŸ‘ 1 views

Measurements of the propagation of UHF radio wa¨es in two trapezoidal tunnels are reported. Values of propagation loss in dBr100 m are gi¨en. 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 achie¨e