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本文介绍了一种有效的数值方法,用来确定导电屏上无限周期裂缝阵的辐射特性。该法采用了一个新的混合位积分公式,并运用矩量法求解。由于采用了子域基函数使其可以很方便地模拟任意形状的裂缝。同时,本文还分析了介质层、接地平面或把空腔置于裂缝任意一边的情况。在计算时采用了一系列快速计算技术,有效地缩短了对周期格林函数的级数求和的时间。用本文提出的方法能获得大批数据,如:裂缝场分布和输入导纳与裂缝阵扫描角的关系。另外还将获得的结果与已有文献的结果进行了比较。
In this paper, an effective numerical method is introduced to determine the radiation characteristics of an infinite periodic crack array on a conductive screen. The law uses a new hybrid bit integral formula, and use the method of moments to solve. Because of the subdomain basis function, it can easily simulate any shape of the crack. At the same time, the paper also analyzes the dielectric layer, the ground plane or the cavity placed on either side of the crack situation. A series of fast calculation techniques are used in the calculation, which effectively shortens the time for the summation of the series of periodic Green functions. A large number of data can be obtained by the method proposed in this paper, such as the distribution of crack field and the relationship between input admittance and scanning angle of fracture array. In addition, the results obtained are compared with the results of the existing literature.