边界积分法及连接算法分析任意腔体的散射

Boundary Integral Method and Connection Algorithm for Scattering from Arbitrary Cavities

本文利用边界积分法分析二维任意腔体的散射，给出一种基于微波网络原理的连接算法，将腔体分为几段，分别用积分方程法计算每段的广义导纳矩阵，然后利用连接算法将各段连接，得到整个腔体的口径导纳矩阵，最后由广义网络原理求解腔体的等效磁流及后向散射场。本文方法可作为一种机辅设计算法。

The electromagnetic scattering from an arbitrary two-dimensional cavity is presented. To alleviate computational constraints of the problem,a connection algorithm is developed basedon microwave network theory. In this paper,the cavity can be divided into sections and the generalized admittance matrix of each section is computed by boundary integral method. The connection algorithm being used,the aperture admittance matrix of the cavity can be derived by cascading the admittance matrices of individual sections. Once the cavity aperture admittance matrix is obtained,theaperture equivalent magnetic current and the backscattered field are found by the generalized network principle. The proposed method can serve as a CAD algorithm.