摘要
提出了一种通过调节相控阵单元激励相位来实现带罩天线瞄准误差快速优化的方法.基于粒子群算法,实现了连续可变相位以及数字离散相位的调节优化.在数字优化编码中结合相位偏移优选技术,有效降低了低位移相器的数字量化误差.结合先验信息,改进瞄准误差优化的速度更新公式,提高了优化收敛速度.分析建立代表场源关系的预计算矩阵,降低适应度函数求解计算量,节约了数值计算时间.通过对16元4位移相阵列天线——正切卵形罩系统的优化设计,验证了该方法的正确性与有效性.
A fast and effective method of radome boresight error(BSE)optimization by adjusting the phase compensation value of phased array elements is proposed.Particle swarm optimization(PSO)is adopted,applying to the case of continuously adjustable phase or digital discrete phase.With the phase offset optimization technology in the optimization encoding,the quantization error of low phase shifters is effectively reduced.The speed updating formula of BSE optimization is improved combined with prior information,and the convergence speed is improved.Pre-computed matrices on behalf of field source relationship are established to reduce the computation of solving the fitness function and save the numerical calculation time.The validity and effectiveness of the presented approach are confirmed by optimal design of a 16 elements array-radome system with 4-bits phase shifters.
出处
《电波科学学报》
EI
CSCD
北大核心
2015年第3期470-475,共6页
Chinese Journal of Radio Science
基金
航空科学基金(No.20132053026)
关键词
天线罩
瞄准误差
优化
移相器
radome
boresight error
optimization
phase shifter
