The effects of cage in mine tunnel on the cutofffrequency is analyzed by the finite-element method when the tunnel is regarded as a waveguide, and the numerical results are obtained.
把矿井隧道看作波导，利用有限元法分析了隧道中的罐笼对电磁波截止频率的影响，并得到数值结果。
2
The results show that the cutofffrequency of the rectangular waveguide tube with the same equivalent radius is far greater than that of the cylindrical tube.