Olen-compton算法在天线阵多波束设计中的应用

Application of Olen-compton Algorithm in Multi-beam Design of Antenna Array

由于近地面空域环境中的复杂干扰信号和地杂波反射,以及现有雷达数字天线阵的尺寸限制,在目标搜索中形成的发射波束往往有较高的旁瓣级。为从设计层面有效实现雷达天线波束形成的旁瓣抑制,提出了将Olen-compton波束形成算法结合天线阵面,进行低旁瓣级多波束优化的应用设想。介绍了Olen-compton波束形成算法的原理,通过设置虚拟干扰源并持续迭代的方式抑制旁瓣,研究了16元十字阵的阵列流形矢量及波束图,并以16元十字阵天线为例,进行了分频段多波束设计的仿真与试验验证。仿真与试验结果表明,Olen-compton波束形成算法在2.5~3.5 GHz这一频段,结合16元十字阵天线能够实现-20 dB的旁瓣级抑制能力,证明该应用在S波段的雷达天线设计中具有实际可行性。

Due to the complex interference signals and ground clutter reflections in the near ground airspace environment,as well as the size limitations of existing radar digital antenna arrays,the transmitted beams formed in target search often have high side lobe levels.To effectively achieve side lobe suppression in radar antenna beamforming at the design level,an application idea of combining the Olen Compton beamforming algorithm with the antenna array for low side lobe level multi beam optimization is proposed.The principle of Olen-compton beamforming algorithm is introduced,the side lobes is suppressed by setting virtual interference sources and continuously iterating is introduced,the array manifold vector and beam pattern of a 16 element cross array is studied,and a 16 element cross array antenna is taken as an example to conduct simulation and experimental verification of frequency division multi beam design.The simulation and experimental results show that the Olen-compton beamforming algorithm can achieve a side lobe suppression capability of-20 dB in the 2.5~3.5 GHz frequency band,combined with a 16 element cross array antenna,proving the practical feasibility of this application in S-band radar antenna design.