Approximate Calculation of the Total Attenuation Rate of Propagating Wave Inside Curved Tunnel

Authors

  • Hany M. El-Maghrabi Department of Electromechnical Housing and National Research Center, Cairo, Egypt
  • Ahmed M. Attiya Department of Microwave Engineering Electronic Research Institute, Cairo, Egypt
  • Samir F. Mahmoud Department of Electronics and Electrical Communication Cairo University, Cairo, Egypt
  • Essam A. Hashish Department of Electronics and Electrical Communication Cairo University, Cairo, Egypt
  • Mostafa El-Said Department of Electronics and Electrical Communication Cairo University, Cairo, Egypt

Keywords:

Curved waveguide, imperfect conducting walls, wave propagation

Abstract

In this paper, a model is presented to simulate wave propagation in curved rectangular tunnels with imperfectly conducting walls. The model is based on treating the tunnel as a waveguide, which is an extension of previous proposed model by Mahmoud [3]. A new approach to calculate the total attenuation rate of the propagated wave inside tunnel is proposed. The approach is considering the effect of imperfect conductivity of the upper and lower walls of the tunnel. This approach is based on assuming that the boundaries of the tunnel section are constant impedance surfaces as the surface impedance of the wall is almost independent of the angle of the wave incidence onto the wall. A simple scenario is considered to check the accuracy of this model. This scenario is verified by comparing experimental and numerical simulation results. Good agreement between the proposed model and the experimental results is obtained.

Downloads

Download data is not yet available.

References

K. Guan, B. Ai, Z. Zhong, C. Lopez, L. Zhang, C. Briso, A. Haovat, and B. Zhang “Measurements and analysis of large-scale fading characteristics in curved subway tunnels at 920 MHz, 2400 MHz, and 5705 MHz,” IEEE Trans. on Intelligent Transportation System, vol. 16, Oct. 2015.

B. Zhang, Z. Zhong, K. Guan, R. He, and C. Briso, “Shadow fading correlation of multi-frequencies in curved subway tunnels,” Proc. IEEE Conf. ITSC, Qingdao, China, pp. 1111-1116, 2014.

S. F. Mahmoud, “Modal propagation of high frequency electromagnetic waves in straight and curved tunnels within the earth,” J. of Electromagn. Waves and Appl., vol. 19, no. 12, pp. 1611-1627, 2005.

M. Lienard, J. M. Molina-Garcia-Pardo, P. Laly, C. Sanchis-Borras, and P. Degauque, “Communication in tunnel: Channel characteristics and performance of diversity schemes,” General Assembly and Scientific Symposium (URSI GASS), 2014 URSI, Aug. 2014.

M. Lienard, C. Sanchis-Borras, J.-M. MolinaGarcia-Pardo, D. P. Gaillot, P. Laly, and P. Degauque, “Performance analysis of antenna arrays in tunnel environment,” IEEE Antennas and Wireless Propagation Letters, vol. 13, pp. 12-125, 2014.

M. Lienard, J.-M. Molina-Garcia-Pardo, P. Laly, C. Sanchis-Borras, and P. Degauque, “MIMO and diversity techniques in tunnels,” International Conference on Computing, Management and Telecommunications (ComManTel), Apr. 2014.

C. Garcia-Pardo, J.-M. Molina-Garcia-Pardo, M. Lienard, D. P. Gaillot, and P. Degauque, “Double directional channel measurements in an arched tunnel and interpretation using ray tracing in a rectangular tunnel,” Progress In Electromagnetics Research M, vol. 22, pp. 91-107, 2012.

A. G. Emslie and R. L. Lagace, “Theory of the propagation of UHF radio waves in coal mine tunnels,” IEEE Trans. AP, vol. 23, no. 2, pp. 192- 205, 1975.

S. F. Mahmoud and J. R. Wait, “Geometrical optical approach for electromagnetic wave propagation in rectangular mine tunnels,” Radio Science, vol. 9, no. 12, pp. 1147-1158, 1974.

P. Delogne, “Basic mechanisms of tunnel propagation,” Radio Science, vol. 11, pp. 299-303, 1976.

J. R Wait and D. A. Hill, “Guided electromagnetic waves along an axial conductor in a circular tunnel,” IEEE Trans. AP, vol. 22, pp. 627-630, 1974.

S. F Mahmoud and J. R. Wait, “Theory of wave propagation along a thin wire inside a rectangular waveguide,” Radio Science, pp. 417-420, 1974.

S. F. Mahmoud, “Characteristics of electromagnetic guided waves for communication in coal mine tunnels,” IEEE Trans. COM, vol. 22, pp. 1547- 1554, 1974.

J. R. Wait and D. A. Hill, “Propagation along a braided coaxial cable in a circular tunnel,” IEEE Trans. MTT, vol. 23, pp. 401-405, May 1975.

J. R.Wait, “EM theory of the loosely braided coaxial cable: Part I,” IEEE Trans. MTT, vol. 24, pp. 262-265, 1976.

D. A. Hill and J. R. Wait, “EM theory of the loosely braided coaxial cable: Part II-Numerical results,” IEEE Trans. MTT, vol. 28, pp. 262-265, 1980. S. F. Mahmoud and J. R. Wait, “Calculated channel characteristics of a braided coaxial cable in a mine tunnel,” IEEE Trans. COM, vol. 24, pp. 82-87, 1976.

P. Degauque, B. Demoulin, J. Fontaine, and R. Gabillard, “Theory and experiment of a mobile communication in tunnels by means of a leaky braided coaxial cable,” Radio Science, vol. 11, pp. 305-314, 1976.

P. Delogne, Leaky Feeders and Subsurface Radio Communication, IEE Electromagnetic Series 14, Peter Peregrinus Ltd., 1982.

M. Lienard and P. Degauque, “Propagation in wide tunnels at 2 GHz: A statistical analysis,” IEEE Trans. on Vehicular Technology, vol. 47, no. 4, pp. 1322-1328, Nov. 1998.

S. F. Mahmoud, Wireless Transmission in Tunnels, Mobile and Wireless Communications Physical Layer Development and Implementatiom. Salma Ait Fares and Fumiyuki Adachi (Ed.), InTech.

M. Lienard and P. Degauque, “Natural wave propagation in mine environment,” IEEE Trans. on AP, vol. 48, no. 9, pp. 1326-1339, 2002.

S. F. Mahmoud and J. R. Wait, “Guided electromagnetic waves in a curved rectangular mine tunnel,” Radio Science, pp. 567-572, May 1974.

Downloads

Published

2021-08-08

How to Cite

[1]
Hany M. El-Maghrabi, Ahmed M. Attiya, Samir F. Mahmoud, Essam A. Hashish, and Mostafa El-Said, “Approximate Calculation of the Total Attenuation Rate of Propagating Wave Inside Curved Tunnel”, ACES Journal, vol. 31, no. 11, pp. 1265–1270, Aug. 2021.

Issue

2016: Vol 31 Iss 11

Section

Articles