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

作者：El Maghrabi Hany M^*; Attiya Ahmed M; Mahmoud Samir F; El Said Mostafa; Hashish Essam A

来源：Applied Computational Electromagnetics Society Journal, 2016, 31(11): 1265-1270.

• Curved waveguide
• imperfect conducting walls
• wave propagation

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.

• 出版日期2016-11