随机相位误差对相控阵天线的性能影响

摘要

The effects of random signal phase errors on the beam pointing accuracy and sidelobe levels of phased array an⁃tenna are analyzed. Based on the model of one⁃dimensional uniform linear array,The theories of probability and statistics were used to deduce the mathematical expectation,variance and peak sidelobe level of beam pointing error. The deduced result was verified and compared by computer simulation. The simulation result shows that the conclusion of the theretical formula deriva⁃tion is in agreement with that of simulation experiment.%　　为了对随机相位误差对于相控阵天线波束指向精度和副瓣电平的影响进行分析，以一维均匀直线阵为模型，采用概率统计的手段对波束指向误差的数学期望、方差和峰值副瓣电平进行了推导，并对此结果进行了计算机仿真验证和比较。仿真结果表明，理论公式推导得到的结论与仿真实验的各项结果吻合良好。