天线反射面近场全息测量关键技术分析.pdfVIP

Research of Near-filed Holography Experiment for Reflector Antenna Abstract Radio Holography is widely used in the on-site measurement of large reflector antennas internationally. It has the highest measurement accuracy of all the reflector antenna detections. The article has studied the theory about the radio holography in near-field. And a set of measurement system in 3mm band is built to do the experiment. It’s the first experiment of near-field radio holography in domestic. We have reached a new high of accuracy in reflector antenna measurement, and accumulated valuable experience for further mensuration of large reflector antennas. The article mainly consist of six chapters: research of the basic theory about near-field holography, analysis of the interfering factors during the experiment, assemblage of the near-field holography measurement system in 3mm band, development of the near-field holography measurement and minimization of the main effect caused by various error factors, assessment of the effect caused by error factors, development of the digital signal correlator for near-field holography. Key word: near-field, radio holography, reflector antenna, 3mm band, measurement accuracy II 万方数据 目 录 摘要I AbstractII 第一章 绪论1 1.1 天线背景介绍1 1.2 天线反射面测量方法2 1.3 论文工作内容概述3 第二章 近场全息测量技术理论4 2.1 基础原理4 2.3 测量信噪比与面形测量精度7 2.4 算法残留系统误差8 2.4.1 无截断误差情况下的残留系统误差8 2.4.2 有截断误差情况下的残留系统误差9 2.4.3 抑制截断误差10 2.5 多径干涉效应11 2.6 小结12