曲面阵列结构散射与辐射特性的迭代分析

建立了一种适用于曲面有限阵列结构辐射与散射特性分析的迭代方法。首先根据阵列结构相同单元电流分布的相似性，对曲面有限阵列单元几何形状和表面电流分布作了两个假定，将有阵阵格林函数法推广应用于曲面有限阵列结构的分析；然后给出曲面有限阵列结构迭代分析的一般公式，通过迭代运算来消除两个假定近似的影响；最后迭代运算来消除两个假定近似的影响；最后以有两曲面带栅的散射和线源激励曲面带栅结构的辐射分析为例，验证了方法的有效性，并同逐元法作了比较，给出了有关的数值计算结果。结果表明：这种迭代法不受阵面曲率变化、单元数量和分布情况的限制，对有限周期和非周期阵列的分析都有着较高的计算效率和稳定性。

An efficient iterative analysis of radiation and scattering from curved array of finite size

An efficient iterative technique for analyzing radiation and scattering from curved array of finite size is presented. Based on the fact that similar array elements have similar current distribution, two assumptions on element geometry and current distribution were proposed and a finite array Green's function (FAGF) method for planar array analysis was generalized to curved array. The iterative technique started from results of the FAGF method and was mainly to eliminate the effects of the two assumptions on result precision. This technique fits for analyzing all kinds of curved arrays including finite periodic and aperiodic arrays. The efficiency and convergence of the technique are not distinctly affected by array curvature, size and cell distribution. This technique is validated through the comparison with results obtained by the rigorous element-by-element method.