利用PSO同时优化阵列天线的辐射和散射特性

Optimizing both radiation and scattering characteristics of the array antenna utilizing PSO

类似于辐射方向图乘积定理,推导出直线阵列天线的雷达散射截面(RCS)可分解为单元因子与散射阵因子之积.相比以往仅优化阵列天线辐射特性的工作,可基于此公式运用粒子群优化算法(PSO),通过调整阵元间距来同时优化其辐射和散射特性.仿真结果表明,优化后的辐射方向图峰值副瓣电平降低,单站RCS的栅瓣得到了有效抑制,使其在绝大部分入射角处于低散射状态,从而证明了该方法能同时优化阵列天线的辐射和散射特性.

In a way the similar to the radiation pattern multiplication theorem,this paper derives that the radar cross section（RCS） of an array is the product of the array RCS factor multiplying the element RCS factor.Based on these two formulas,the method for synthesizing both desired radiation and scattering patterns by optimizing the element placement is proposed.In order to verify its validity,the method is used to minimize the peak sidelobe level（PSLL） of both the radiation and scattering patterns.Compared with the uniform array,the PSLL of both the optimized radiation and scattering pattern are considerably reduced by optimization.