基于粒子群算法的宽带真延时平面阵列方向图综合

Planar array pattern synthesis of wideband real time delay based on particle swarm optimization algorithm

针对大阵元间距平面阵列方向图综合问题,提出基于粒子群算法的宽带真延时平面阵列方向图综合方法。该方法根据真延时条件下阵列方向图主瓣和栅瓣指向的特点,采用宽带真延时抑制阵列方向图的栅瓣;利用粒子群优化算法优化阵列结构,得到具有较高主副瓣比的平面阵列方向图。通过对8×8的矩形平面阵进行仿真,验证了所提方法的有效性,在此基础上,还仿真研究了该方法对栅瓣的抑制性能与信号带宽之间的关系。

For the problem of the pattern synthesis for planar array with large elements spacing,a planar array pattern synthesis method of wideband real time delay based on particle swarm optimization algorithm was proposed.In this method,according to the characteristics of the main lobe orientation and the grating lobes orientation under the condition of real time delay,the wideband real time delay was adopted to suppress the grating lobe of pattern.Then,the structure of array was optimized by particle swarm optimization algorithm and the pattern with higher main-side-ratio was obtained.The effectiveness of the proposed method was indicated by the simulation for 8×8 rectangular planar array.Furthermore,the relationship between the grating lobe suppression performance and the signal bandwidth was studied through the simulation.