摘要
介绍了一种利用近场测量系统进行阵列天线口径反演的新方法。该方法将近场测量系统采集的近场数据变换到平面波谱(PWS),在平面波谱上进行天线单元因子补偿后运用口径场反演算法,重构出被测阵列天线口径面上各天线单元馈电端口的幅相分布。随后使用计算机模拟的方法在理想近场数据上加入单元通道误差,将乘积反演方法与传统插值反演方法在模拟结果上进行对比,随后分析了单元不一致给反演结果带来的影响,证明了该方法具有较高的反演精度,有效提高了阵列天线口径校正的效率。
A new method for reconstructing array antenna aperture by use of nearfield measurement sys- tem is presented. In the method, the acquired near-field data is transformed into plane wave spectrum （PWS）, in which the antenna element factor is compensated. Then the amplitude and phase distributions of every antenna element feed port on aperture surface of array antenna are compensated. The element channel error is added to the ideal near-field data through computer simulation. The result of ineonformity of ele- ments is also analyzed. This method has high inversion precision and improves the efficiency of array antenna aperture correction effectively.
出处
《雷达科学与技术》
北大核心
2015年第3期305-309,共5页
Radar Science and Technology
关键词
近场测量
平面波谱
单元因子
口径场反演
near-field measurement
plane wave spectrum
element factor
aperture inversion
