针对光控相控阵在实现宽带宽角扫描时,所需要的光真延时器数目过多问题进行研究,提出了基于压缩感知的光控相控阵方向图形成方法。首先通过公式推导详细分析了影响光控相控阵波束偏移的因素,其次给出光真延时器稀疏排布方式,在此基础上基于压缩感知理论恢复出光控相控阵的方向图。所提方法能够在大幅减少光真延时器数目的条件下实现宽带宽角扫描。最后利用仿真实验验证了所提方法的有效性。

Too many Optical True Time Delayers (OTTDs) are needed when optically phased array radar scans in wideband and wide-angle modes.To solve the problem,a beam-forming method based on compressed sensing is proposed for the optically phased array radar with sparse array.Firstly,the factors affecting main-lobe deviation are analyzed in detail by formula derivation.Secondly,a configuration of the sparse antenna array is presented,on the basis of which,the pattern of the optically phased array is restored based on the compressed-sensing theory.Using this method,a quite small number of OTTDs are required for wideband and wide-angle scanning.Finally,this method is validated by the simulation results.