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.

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References

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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

General Submission