对于激光雷达中液晶相控阵组件, 如何选取一定数量的扫描角度, 使得光束扫描能够覆盖整个视场范围并满足扫描指标的要求是一个崭新的问题。提出了一种基于二元光栅波控模型的液晶相控阵组件扫描角度筛选方法; 该方法利用二元光栅波控模型对液晶相控阵组件的光束扫描进行控制, 并将扫描视场均匀覆盖、光束最大副瓣大小与衍射效率作为扫描角度筛选的约束条件, 通过遍历对比的方式实现扫描角度的筛选。仿真结果表明该筛选方法有效可行。

Regarding the liquid crystal phased array component of radar, how to select a certain amount scanning angles so as to satisfy the conditions that the light-beams of all scanning angles can cover the field of view and meet the scanning index is a brand-new problem. This paper proposes a method of scanning angles screening based on the beam-steering model of binary grating. In the method, the scanning angles are obtained by using a traversal algorithm. The beamsteering model of binary grating is used to steer the light beam and the uniform coverage of the field of view, maximum sidelobe level, diffraction efficiency are regarded as constraint conditions of scanning angles screening. The simulation results from Matlab show that the method is effective and feasible.