电压的量化位数限制了波阵面相位的选择范围,导致波束的偏转角度偏离理想角度,从而降低指向精度。指向精度是液晶相控阵(LCPA)性能的重要指标之一。提出了一种提高指向精度的优化算法。该算法以最优化理论为依据,采用模式搜索方法,通过调整电压台阶的方式进行优化。首先分析了电压量化指向精度的影响,建立了波控模型,然后利用模式搜索法,以减小实际角度与理想角度之间偏差为目标进行相应的电压台阶修正。仿真结果表明,在扫描角度范围内,该算法能将归一化精度误差从100数量级降至10-3数量级,优化效果显著。 The quantification of the voltage limits the selection of the wavefront phase, resulting in a deviation of the beam deflection from the ideal angle, thereby reducing the pointing accuracy. Pointing accuracy is one of the important indicators of liquid crystal phased array (LCPA) performance. An optimization algorithm to improve pointing accuracy is proposed. The algorithm based on optimization theory, using the mode search method, by adjusting the voltage steps to optimize. Firstly, the influence of the pointing accuracy of the voltage is analyzed, and the wave control model is established. Then, the mode search method is used to correct the voltage step with the aim of reducing the deviation between the actual angle and the ideal angle. The simulation results show that the algorithm can reduce the error of normalization accuracy from 100 orders to 10-3 orders of magnitude within the scan angle range, and the optimization effect is remarkable.