部分随机馈相对相控阵天线波瓣性能的影响分析

相位量化将引起相控阵天线峰值副瓣电平恶化、波束偏离预定指向等问题,合理选择馈相方法是降低其影响的关键．文中在给出数字馈相通用数学模型的基础上,以二可能值法为例,对四舍五入、完全随机和部分随机等馈相方法进行了蒙特卡洛仿真和分析．仿真结果表明,在完全随机馈相的基础上,部分随机馈相能进一步改善相控阵天线副瓣电平和波瓣指向等关键的波瓣性能指标,并且不明显增加原有馈相方法的运算量,适于在实际应用中加以推广．

Consequence Analysis for Partial Randomizing Phase Feeding on Lobe Performance of Phased Array Antenna

Phase quantization will bring phased array antenna some adverse effects,such as worsening of the peak value of the side lobe levels,departure from the scheduled point direction of the beam position,and so on.An appropriate choice of phase feeding method becomes the key to reduce these effects.On basis of putting forward the general mathematical model of the digital phase feeding,this paper takes two-probable value method as an example,and presents the Monte Carlo simulation results for round-off method,complete random method as well as partial random method.Analysis of these results shows,partial random phase feeding method can improve the lobe performance of phased array antenna still further and doesn't increase algorithmic operand evidently in comparison with complete random method.Therefore,this method can be popularized in practical application.