截锥边缘绕射的等效边缘电流驻相法

截锥边缘绕射的等效边缘电流驻相法 EQUIVALENT EDGE CURRENT STATIONARY PHASE METHOD FOR COMPUTING DIFFRACTION BY EDGES OF A CONE 陈赤刚 Chen Chigang Huang Xiwen first-author 黄锡文 对于边缘绕射问题,几何绕射理论法的计算时间虽不长,但在散焦区得出结果发散。如用等效边缘电流的积分公式进行计算,其计算时间则太长。本文对导电截锥缝隙源激励情况下的等效边缘电流的积分公式,采用了驻相法作渐近计算,得出相应各区域的驻相法计算公式,特别是阴影边界邻域,考虑到跃变点的影响,本文作了相应的数学处理,得到了合理的结果。等效边缘电流驻相法计算的数值结果与积分的数值结果符合得很好。而前者的计算时间约为后者的十分之一。本文还将等效边缘电流驻相法计算的结果与实验测试结果进行了比较,两者吻合情况较好。 For evaluatng diffraction by edges, the Computing time of the geometrical theory of diffraction is not long, but the solution is divergent in some region. If the equivalent edge current integral（EEEI） method is used, a very long computing time is required, and the result is reasonable everywheze. In this peper the stationary Phase method is used for compution EECI. Appropriate formulae have been derived for various regions. The results of the stationary phase method agree well with those of EECI, and agree well also with the measuring data, while the computing time of the stationary phase method has been reduced to 1/10 about of that of EECI. 电磁波绕射 电磁波散射 Electiromagnetic wave diffraction electromagnetic wave scattering 1987-03-01 2021-04-01 3