复合阵列射频仿真系统的近场效应修正

发布时间：2019-04-23 12:36

【摘要】：射频仿真系统的误差以及误差的修正一直是各科研机构关注的重点,而复合天线阵列的近场误差的变化规律及误差的校正也是非常值得研究和探讨的。本篇论文通过计算复合阵列下三元组辐射的相位中心与角闪烁方程计算的辐射中心的角偏差,分析了射频仿真系统中复合阵列的近场误差的变化规律,并结合三元组相位中心的理论控制算法,形成阵列式目标近场修正控制方法,来实现复合阵列射频仿真系统的近场效应修正。通过改变天线的输入功率对近场效应进行修正,不仅使得近场效应校正得到了解决而且可以降低升级硬件设备的投资成本,可以比较便捷地实现近场的校正。本篇论文基于本校与某研究所合作项目《射频复合阵列目标近场修正与应用技术》,对以下几项内容做了研究：(1)第一二章概述了本文的选题背景以及现阶段研究进展,主要介绍了近场效应修正的近况,并介绍近场效应相关的基本理论。(2)第三章利用项目给定的参量,对两元组的测角精度规律做了研究,并在测角精度规律的基础上对两元组进行了误差修正。此外,还对项目要求的三种口径大小分别进行仿真分析。(3)第四章介绍了微波三元组,毫米波三元组,以及微波/毫米波复合阵列下的三元组测角精度的变化规律。并通过曲线拟合,使用插值法直接计算某些点处的测角精度值,节约了仿真时间。此外,还将仿真数据与实测数据进行对比。(4)第五章在第四章对测角精度变化规律分析的基础上,对三元组以及复合阵列下的三元组进行近场修正,比较修正前后的误差大小。并制成误差修正表,以供工程上的使用。(5)第六章总结了本文的工作,并对后续研究进行展望。
[Abstract]:The error of RF simulation system and the correction of the error have always been the focus of the scientific research institutions, and the variation rule of the near-field error and the correction of the error of the composite antenna array are also worthy to be studied and discussed. In this paper, the variation rule of the near-field error of the composite array in RF simulation system is analyzed by calculating the angle deviation between the phase center of the triple array radiation and the radiative center calculated by the angular scintillation equation. Combined with the theoretical control algorithm of the three-tuple phase center, an array target near-field correction control method is formed to realize the near-field effect correction of the composite array RF simulation system. By changing the input power of the antenna to modify the near-field effect, not only the near-field effect correction can be solved, but also the investment cost of upgrading the hardware equipment can be reduced, and the near-field correction can be realized conveniently. Based on the project "near-field correction and application technology of RF composite array targets", this thesis studies the following contents: (1) Chapter one and chapter two summarize the background of the topic selection and the research progress at this stage. This paper mainly introduces the recent situation of the near-field effect correction, and introduces the basic theory of the near-field effect. (2) in the third chapter, using the given parameters of the project, the accuracy law of the angle measurement of the two tuples is studied. On the basis of the accuracy rule of angle measurement, the error correction of the two tuples is carried out. In addition, the three caliber sizes required by the project are simulated and analyzed separately. (3) in chapter 4, the variation rules of the angle measurement accuracy of the microwave triple group, the millimeter wave ternary group and the microwave / millimeter wave composite array are introduced. Through curve fitting and interpolation, the precision value of angle measurement at some points is calculated directly, which saves the simulation time. In addition, the simulation data are compared with the measured data. (4) in chapter 4, based on the analysis of the variation law of angle measurement accuracy, the near-field correction of the triplets and the triplets under the composite array is carried out in the fifth chapter. Compare the error before and after the correction. The error correction table is made for engineering use. (5) in chapter 6, the work of this paper is summarized and the future research is prospected.
【学位授予单位】：华东师范大学
【学位级别】：硕士
【学位授予年份】：2016
【分类号】：TP391.9

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