天线阵列-天线罩系统的相位不一致性研究

Research on Phase Inconsistency of the Antenna Array-Radome System

论文基于天线阵列采用长短基线干涉仪方法实现测向的应用背景,研究了天线罩对天线阵列测向性能的影响,进一步完善了天线阵列-天线罩系统电性能测试中的相位不一致性概念,并分析了相位不一致性与测向误差之间的关系。设计了一款满足宽频带透波性能要求的A型夹层结构天线罩,并在微波暗室中进行了实物测试。实测结果表明相位不一致性与由天线罩引起的测向误差之间存在着正相关关系。证明可以运用相位不一致性衡量天线罩对测向结果的影响,进而衡量天线罩设计的优劣,并指导天线罩的设计加工。这一结论可为天线阵列-天线罩系统的设计提供有意义的理论依据。

Based on the method of multi-baseline interferometer used in antenna array to achieve direction finding,the influence of radome on the antenna array direction finding performance is studied,the concept of phase inconsistencies of the system of antenna array-radome is further improved,and the relation between the phase inconsistencies and the error of testing is analyzed. A type of A sandwich radome is designed,which satisfies the requirement of broadband through wave performance,and completes a physical test in an anechoic chamber. The measured results show that there is a positive correlation between the phase inconsistencies and the direction finding errors caused by radome,demonstrating that the phase inconsistency can be used to measure the radome＇s impact on the results of finding,measure the merits of radome design and guide the radome design and processing. The conclusion provides theoretical support to the design of antenna array-radome system.