一种大型阵列天线散射特性快速计算方法

Fast Method for Calcuating the Scattering From Large Arrays Antennas

针对大型阵列天线的散射特征，提出了一种基于区域分解方法计算大型相控阵天线散射特性的快速计算方法，将相控阵天线的散射计算问题分解为求解反射板和辐射天线阵列两个子区域的问题，使以前不能在PC机上计算大型阵列天线的散射问题得以解决，并且计算速度快。该方法已经在工程中得到应用，通过与实测数据进行对比，计算精度可以达到±1dB以内。该方法在保证计算精度的同时可以大大降低计算复杂度，极大地提高了计算效率，为大型相控阵天线RCS预估提供了一种高效、可靠的解决方法。

A fast calculation method is proposed for estimating the scattering performance of large-scale phased antenna array based on the domain-decomposition mechanism. The scattering solution problem can be divided into estimating the two sub-domains of reflector and radiating array. Thus, the scattering solution problem of large-scale antenna array can be settled by using personal computer as the calculation speed is accelerated. The proposed method has been successfully utilized in one of Chinese major engineering pro-jects. The obtained results can confirm that the calculation error fluctuation is less than ±1dB corresponding with the measured data. The proposed method is suitable for maintaining the computational accuracy while reducing the complexity and enhancing the efficiency, indicating that it is efficient and effective for estimating the radar cross section （RCS） of large-scale phased antenna array.