[仿真]Analysis of electromagnetic field distribution in tunnels by the boundary-element method

Abstract: An efficient numerical approach, based <\<o#Vq  
on the boundary-element method, for the analysis wB[f%mHs  
of electromagnetic field distributions in twodimensional c+e?xXCEAz  
tunnels with discontinuities such as ?.%dQ0  
L-bends, T-junctions, and cross-junctions is SU4i'o  
described. The side walls of the tunnels are nL/]
Q'(5  
assumed to be lossy dielectric and the surface 1J/'R37lP  
impedance approximation is used to determine the th[v"qD9G  
boundary condition on the side walls. A computer QJ4$) Fr(  
program has been developed for tunnels excited f+uyO7  
by a line current or a TE dominant mode. A comparison kl.;E{PL  
of the numerical results with the experimental 0>7Ij7\[8  
results using microwave simulation shows ll4CF}k  
a good agreement except in the vicinity of .. [UI>SN  
:M6v<Kg{;  

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