Propagation of UHF radio waves in trapez
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G. X. Zheng; J. H. Sheng; Y. P. Zhang
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Article
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1999
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John Wiley and Sons
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English
β 88 KB
π 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