𝔖 Bobbio Scriptorium
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Natural propagation of electromagnetic waves in tunnels

✍ Scribed by Deryck, L.


Book ID
117904217
Publisher
IEEE
Year
1978
Tongue
English
Weight
541 KB
Volume
27
Category
Article
ISSN
0018-9545

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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