摘要
利用等效磁流子法和波在非理想导体壁上的边界条件对带有狭隙的无限大非理想导体板建模，并用矩量法计算了频率及电导率对其总体屏蔽效能的影响。计算结果表明了电导率越大，对导体板总屏蔽效能的影响也越大；就同一种导体板而言，当其厚度接近于某一频率下导体的趋肤深度时，在该频率处电导率对总屏蔽效能的影响最大。同时，本文还给出了当导体板分别为理想导体、铜和铝时狭隙的远场方向性图，从图中可以看出电导率对狭隙方向性的影响将随着电导率增大反而变小；并且就电导率σ=∞时狭隙方向性图的计算结果与D．T．Auckland等人计算的结果进行了比较，结果完全吻合。
Both the equivalent magnetic current method and the boundary condition while wave is propagating along a wall of an imperfect conductor is developed for modeling an infinite imperfectly conducting plane with a slit. and the method of moments is used to analyze effects of frequency and conductivity on the total shielding effectiveness. Results show that the larger conductivity is, the more effect will be, and that for the same conductivity, it will be most at some frequency when the thickness of the plane is proximate to its skin depth at the frequency. Far-field patterns of slits in an imperfectly conducting plane, copper land aluminium show that the effect of conductivity on the pattern is less for larger conductivity, and that the pattern of σ=∞ is the same as that obtained by D.T. Auckland et. al.
出处
《电波科学学报》
EI
CSCD
1998年第4期398-402,共5页
Chinese Journal of Radio Science
关键词
等效磁流子法
狭隙
屏蔽效能
非理想导体板
Equivalent magnetic current method Slit Shielding effectiveness Imperfectly conducting plane
