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Modeling and measurement of radio propagation in rectangular tunnels at low frequencies.

Authors
Zhou-C; Waynert-J
Source
2014 IEEE Antennas and Propagation Society International Symposium, APSURSI 2014, United States. Washington, DC: IEEE Antennas and Propagation Society, 2014 Sep; :253-254
NIOSHTIC No.
20045489
Abstract
Radio propagation in tunnels has been investigated for decades and many methods for modeling tunnel propagation have been proposed. Most of the methods, however, assume that the wavelengths of interest are much less than the tunnel dimensions, which limits their application to relatively high frequency signals. In this paper, we investigate a numerical method that can be applied to analyze power attenuation at low frequencies as wavelengths are comparable to tunnel dimensions. The method is based on numerically solving the complex boundary conditions for frequencies of interest. We validate the method with wideband (spanning from 25 MHz to 1525 MHz) propagation measurements in a rectangular tunnel without an arched ceiling.
Keywords
Mining-industry; Wave-propagation; Sound-propagation; Radio-waves; Models; Analytical-methods; Noise-frequencies; Noise-waves; Tunneling; Sound-analyzers; Electrophysiological-measurements; Environmental-factors; Environmental-technology; Communication-systems; Signaling-systems
CODEN
IAPSB
Publication Date
20140918
Document Type
Conference/Symposia Proceedings
Fiscal Year
2014
NTIS Accession No.
NTIS Price
ISBN No.
9781479935406
Identifying No.
M122014
ISSN
1522-3965
NIOSH Division
OMSHR
Priority Area
Mining
Source Name
2014 IEEE Antennas and Propagation Society International Symposium, APSURSI 2014, July 6 - 11, 2014, Memphis, Tenessee
State
PA; TN
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