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

Abstract: An efficient numerical approach, based Kn SXygT  
on the boundary-element method, for the analysis };o6|e:2E  
of electromagnetic field distributions in twodimensional *]nha1!S  
tunnels with discontinuities such as \bw71( Q  
L-bends, T-junctions, and cross-junctions is CkE@Ll3Z  
described. The side walls of the tunnels are " ;_bB"q*  
assumed to be lossy dielectric and the surface A,ttn5Sh?  
impedance approximation is used to determine the @Ck6s  
boundary condition on the side walls. A computer 2f9~:.NgF  
program has been developed for tunnels excited }QU9+<Z[r  
by a line current or a TE dominant mode. A comparison [u;]J*  
of the numerical results with the experimental =;-/( C  
results using microwave simulation shows M=H
W2xn  
a good agreement except in the vicinity of .. (cAv :EKpo  
.+t{o[  

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