Propagation Mechanism Modeling in the Near-Region of Arbitrary Cross-Sectional Tunnels
Along with the increase of the use of working frequencies in advanced radio communication systems, the near-region inside tunnels lengthens considerably and even occupies the whole propagation cell or the entire length of some short tunnels. This paper analytically models the propagation mechanisms...
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| Main Authors: | , , , , , |
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| Format: | Article |
| Language: | English |
| Published: |
Wiley
2012-01-01
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| Series: | International Journal of Antennas and Propagation |
| Online Access: | http://dx.doi.org/10.1155/2012/183145 |
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| _version_ | 1832554237060448256 |
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| author | Ke Guan Zhangdui Zhong Bo Ai Ruisi He Yuanxuan Li César Briso Rodríguez |
| author_facet | Ke Guan Zhangdui Zhong Bo Ai Ruisi He Yuanxuan Li César Briso Rodríguez |
| author_sort | Ke Guan |
| collection | DOAJ |
| description | Along with the increase of the use of working frequencies in advanced radio communication systems, the near-region inside tunnels lengthens considerably and even occupies the whole propagation cell or the entire length of some short tunnels. This paper analytically models the propagation mechanisms and their dividing point in the near-region of arbitrary cross-sectional tunnels for the first time. To begin with, the propagation losses owing to the free space mechanism and the multimode waveguide mechanism are modeled, respectively. Then, by conjunctively employing the propagation theory and the three-dimensional solid geometry, the paper presents a general model for the dividing point between two propagation mechanisms. It is worthy to mention that this model can be applied in arbitrary cross-sectional tunnels. Furthermore, the general dividing point model is specified in rectangular, circular, and arched tunnels, respectively. Five groups of measurements are used to justify the model in different tunnels at different frequencies. Finally, in order to facilitate the use of the model, simplified analytical solutions for the dividing point in five specific application situations are derived. The results in this paper could help deepen the insight into the propagation mechanisms in tunnels. |
| format | Article |
| id | doaj-art-94cb03c43676400a985e463f5142984e |
| institution | Kabale University |
| issn | 1687-5869 1687-5877 |
| language | English |
| publishDate | 2012-01-01 |
| publisher | Wiley |
| record_format | Article |
| series | International Journal of Antennas and Propagation |
| spelling | doaj-art-94cb03c43676400a985e463f5142984e2025-02-03T05:52:01ZengWileyInternational Journal of Antennas and Propagation1687-58691687-58772012-01-01201210.1155/2012/183145183145Propagation Mechanism Modeling in the Near-Region of Arbitrary Cross-Sectional TunnelsKe Guan0Zhangdui Zhong1Bo Ai2Ruisi He3Yuanxuan Li4César Briso Rodríguez5State Key Laboratory of Rail Traffic Control and Safety, Beijing Jiaotong University, Beijing 100044, ChinaState Key Laboratory of Rail Traffic Control and Safety, Beijing Jiaotong University, Beijing 100044, ChinaState Key Laboratory of Rail Traffic Control and Safety, Beijing Jiaotong University, Beijing 100044, ChinaState Key Laboratory of Rail Traffic Control and Safety, Beijing Jiaotong University, Beijing 100044, ChinaState Key Laboratory of Rail Traffic Control and Safety, Beijing Jiaotong University, Beijing 100044, ChinaEscuela Universitaria de Ingeniería Técnica de Telecomunicación, Universidad Politècnica de Madrid, 28031 Madrid, SpainAlong with the increase of the use of working frequencies in advanced radio communication systems, the near-region inside tunnels lengthens considerably and even occupies the whole propagation cell or the entire length of some short tunnels. This paper analytically models the propagation mechanisms and their dividing point in the near-region of arbitrary cross-sectional tunnels for the first time. To begin with, the propagation losses owing to the free space mechanism and the multimode waveguide mechanism are modeled, respectively. Then, by conjunctively employing the propagation theory and the three-dimensional solid geometry, the paper presents a general model for the dividing point between two propagation mechanisms. It is worthy to mention that this model can be applied in arbitrary cross-sectional tunnels. Furthermore, the general dividing point model is specified in rectangular, circular, and arched tunnels, respectively. Five groups of measurements are used to justify the model in different tunnels at different frequencies. Finally, in order to facilitate the use of the model, simplified analytical solutions for the dividing point in five specific application situations are derived. The results in this paper could help deepen the insight into the propagation mechanisms in tunnels.http://dx.doi.org/10.1155/2012/183145 |
| spellingShingle | Ke Guan Zhangdui Zhong Bo Ai Ruisi He Yuanxuan Li César Briso Rodríguez Propagation Mechanism Modeling in the Near-Region of Arbitrary Cross-Sectional Tunnels International Journal of Antennas and Propagation |
| title | Propagation Mechanism Modeling in the Near-Region of Arbitrary Cross-Sectional Tunnels |
| title_full | Propagation Mechanism Modeling in the Near-Region of Arbitrary Cross-Sectional Tunnels |
| title_fullStr | Propagation Mechanism Modeling in the Near-Region of Arbitrary Cross-Sectional Tunnels |
| title_full_unstemmed | Propagation Mechanism Modeling in the Near-Region of Arbitrary Cross-Sectional Tunnels |
| title_short | Propagation Mechanism Modeling in the Near-Region of Arbitrary Cross-Sectional Tunnels |
| title_sort | propagation mechanism modeling in the near region of arbitrary cross sectional tunnels |
| url | http://dx.doi.org/10.1155/2012/183145 |
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