相位误差对相控阵天线影响分析与改进

Analysis and Improvement of Phase Error Effect on Phase Array Antenna

为减少相位误差对相控阵天线的影响,介绍了相控阵天线数字移相器相位量化误差产生的原理,分析了相位量化误差对相控阵天线波束指向精度和天线波束性能的影响。为改善这一情况,提出采用递推比较补偿馈相法代替传统的确定性馈相法,通过对2种方法进行比较分析,证明在不改变硬件的条件下,递推比较补偿馈相法能够减少相位量化误差的影响,降低波束指向误差的极大值和均方差,提高相控阵天线的指向精度和波束性能。

In order to reduce the Effect of Phase Error on Phase Array Antenna,production principle of quantitative phase error of digital phase shifter using in the phase array antennas is introduced firstly, and its influence on the pointing accuracy and performance of antenna beam are analyzed. In order to mitigate the effects, the shift compare and compensate phase feeding method （SCCPFM）instead of the traditional deterministic phase feeding method is proposed. The comparing results of the capacities of the two methods show that, the SCCPEM can reduce the effect of quantitative phase error and the maximum and mean square error of the beam pointing accuracy, improving the performance and pointing accuracy of antenna beam.