【摘要】 本文利用高频近似方法与低频数值方法相结合的混合方法计算二维开槽电大目标的散射。首先根据等效原理将目标散射场进行分解 ,分别采用迭代物理光学法和边界元法计算槽缝填充的电大目标和槽缝散射 ,并应用广义网络原理和互易定理处理口径耦合问题。数据结果表明本文方法较高的精度和效率。更多还原

【Abstract】 A hybrid technique for calculating the scattering of two-dimensional large bodies with slots is developed by combining high-frequency approximation method with low-frequency numerical method. The total scattered field is divided into two parts, i.e; the scattering of the large bodies and that of the slots by using the equivalence theorem. The former can be computed by the iterative physical optical method(IPO) directly and the later by the boundary element method(BEM), the generalized network principle and the reciprocity theorem are then employed to deal with the coupling across the aperture opening. Some numerical results are obtained, showing the precision and efficiency of the proposed method.更多还原