阵列天线散射条件下的互耦校正

当阵列存在近场散射源时，互耦效应的分析和校正更加繁杂，这就导致了阵列互耦矩阵的参数化建模需要做进一步的扩展，使得互耦矩阵不再为方阵。然而现有的参数化互耦校正方法均假设互耦矩阵是一个具有特殊数学结构的方阵，对非方阵的互耦矩阵模型不适用。本文通过引入少量远离阵列且相互间隔较远的辅助阵元（互耦效应可以忽略）和方向未知的校正信源，提出了一种阵列天线散射条件下的互耦校正的参数估计算法。首先，推导了扩展后的非方阵互耦矩阵系数与方位依赖的幅相误差的等价关系；然后，对每次单源实验，得到校正源方位和各阵元方位依赖的幅相误差的联合估计，建立估计的幅相误差以非方阵互耦系数为参数的方程；最后，将多次单源校正得到的方程进行整合构建方程组，利用Tikhonov正则化方法求解不适定方程组实现互耦系数的有效估计，进而对阵列互耦进行校正。计算机仿真实验结果表明所提算法可以很好地解决阵列天线散射条件下的互耦校正问题，从而验证了算法的有效性。 

Mutual Coupling Calibration of Array antenna in the Presence of Scattering

Analysis and calibration of mutual coupling is more complicated in the presence of structure scattering caused by the platform or conducting plate located near the array.The parametric model of mutual coupling matrix should be extended,this makes the mutual coupling matrix is no longer a square matrix.Besides,the existing parametric array calibration methods for mutual coupling don' t work yet because they are proposed on the assumption that the mutual coupling matrix is a square matrix with a special struc...