单元极化误差对干涉仪测向影响的建模与仿真

Modeling and Simulation of Element Polarization Error Effect on the Direction Finding by Interferometer

雷达侦察、被动导引头、反辐射武器等均采用相位干涉体制测向,其对测向误差的研究几乎未考虑过天线单元的极化误差。文中对干涉仪阵列天线单元存在极化误差条件下的测向性能,提出一个新观点,即接收天线单元交叉极化方向图不一致性的存在,可导致测向性能的下降,并且这种变化敏感于信号源的极化方式。通过对该问题进行理论建模和仿真实验,证明了观点的正确性,研究成果为电子信息装备试验鉴定提供了新的分析视角。

Radar reconnaissance, passive radar seeker, anti-radiation weapons often adopted the phase interference system to direc- tion finding, the research on direction finding error almost nevet considered the polarization error of antenna unit. This paper ana- lyzed direction finding performance when the interferometer array unit had polarization error. We proposed a new point of view that the inconsistency of receiving antenna unit cross polarization could lead to a decline in direction finding performance, and this change was sensitive to the polarization of signal source. Through theoretical modeling and simulation, we proved the correctness of the view. The research results provided a new perspective for electronic information equipment test.