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
Natural propagation of radio signals in confined spaces
β Scribed by Y. P. Zhang
- Publisher
- John Wiley and Sons
- Year
- 1999
- Tongue
- English
- Weight
- 173 KB
- Volume
- 23
- Category
- Article
- ISSN
- 0895-2477
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β¦ Synopsis
The solenoidal basis functions defined on tetrahedrons are modified to permit the analysis of the problem of scattering of electromagnetic wa¨es by inhomogeneous dielectric objects. In the analysis of the scattering of EM plane wa¨es by an inhomogeneous dielectric cube, we compare our results with those obtained using pulse basis functions. We also apply our method in the analysis of the scattering of EM plane wa¨es by an inhomogeneous dielectric sphere, and compare the results with those obtained using the Mie's series. Finally, we apply our method in the analysis of the electromagnetic fields induced inside human tissue. We compare these results with those obtained using pulse basis functions.
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