相位干涉仪测向天线阵基线优化设计方法

Baseline optimization method of phase interferometer direction finding antenna array

摘要:

针对相位干涉仪测向天线阵基线设计问题，给出了干涉仪虚拟基线构建方法和实基线优化方法。在相位干涉仪的物理约束条件内，通过合理设计虚拟基线数量和优化实基线比值，克服了传统设计方法中采用非最优实基线比值导致相位误差较小时实基线较长的缺陷。利用设计方法给出了0.35~18 GHz频段内相位干涉仪测向天线阵的基线优化案例，并对基线设计结果进行解模糊和测角精确度分析验证。仿真实验表明，本文方法能够在满足测角精确度的前提下，通过优化实基线比值，实现任意条件下的测向天线阵基线优化设计。

Abstract:

Aiming at the baseline optimization of phase interferometer direction finding antenna array, the construction of virtual baseline and the optimization of real baseline are presented. Within the physical constraints of the phase interferometer, by reasonably designing the number of virtual baseline and optimizing the ratio of real baseline, the shortcoming of long real baseline caused by non-optimal real baseline ratio in traditional method is overcome, the optimal method of the length of direction finding antenna array baseline under any condition is realized. Finally, the presented method is employed to give the baseline optimization in 0.35~18 GHz, the ambiguity resolution and the angle measurement accuracy are analyzed and verified. Simulation experiment shows that, under the condition of satisfying angle measurement accuracy, the proposed algorithm can optimize the baseline of direction finding antenna array under any condition by optimizing the real baseline ratio.