强耦合超宽带相控阵列天线设计与实现

发布时间：2018-05-13 07:52

本文选题：强耦合 + 天线阵列　；参考：《南京理工大学》2017年硕士论文

【摘要】：现代雷达和通信领域对系统多功能化的需求日益迫切,而天线作为系统中重要组成部分,必须适应多设备、多频段、高集成的发展趋势,因此关于超宽带小型化天线及其阵列的研究已成为国内外天线领域的重要课题之一。本文针对此课题并结合近年来兴起的强耦合超宽带阵列,以宽频带、低剖面的相控阵列天线作为设计目标,讨论了强耦合宽带天线的几种阵元形式,给出了几款超宽带Vivaldi及偶极子相控阵列的设计方案及工程实现。同时,由于传统天线设计方法存在着设计方法复杂、设计周期长、过分依赖于天线设计者经验等缺陷,本文也探讨了一种新的天线设计及优化方案。论文的主要工作如下:1.对强耦合超宽带Vivaldi相控阵天线的研究该部分阐述了超宽带阵列天线的设计方法,研究了 Vivaldi阵元的结构尺寸对天线阵列的性能影响,并以Vivaldi天线作为阵元设计了一款相控阵列,该阵列工作带宽超过十倍频程且拥有良好的扫描性能。此外,该部分也设计了一款低剖面小型化Vivaldi阵列天线以及一款全金属强耦合Vivaldi阵列天线。2.对强耦合偶极子相控阵天线以及碎片相控阵天线的研究该部分给出了一款工作频带为三倍频程的偶极子相控阵列,并针对该阵列设计了一款小型化共面巴伦。针对传统天线设计方法的缺陷,本文提出了一种将遗传算法和电磁仿真软件结合的天线设计优化方法,设计出的强耦合碎片天线可以拥有更加优异的性能。利用该方法将前文中的三倍频程偶极子天线优化为拥有五倍频程工作带宽的碎片天线,验证了方法的可行性。
[Abstract]:The demand for multifunctional system in modern radar and communication field is more and more urgent. As an important part of the system, antenna must adapt to the development trend of multi-equipment, multi-frequency band and high integration. Therefore, the research of UWB miniaturized antenna and its array has become one of the most important topics in the field of antenna at home and abroad. Aiming at this topic and combining with the strong coupling UWB array which has emerged in recent years, this paper discusses several kinds of array element forms of strong coupling wideband antenna with wide band and low profile phased array as the design target. The design scheme and engineering implementation of several UWB Vivaldi and dipole phased array are given. At the same time, due to the shortcomings of the traditional antenna design method, such as complex design method, long design period and excessive dependence on the antenna designer's experience, this paper also discusses a new antenna design and optimization scheme. The main work of the thesis is as follows: 1: 1. Study on the strong Coupling Ultra-Wideband Vivaldi phased Array Antenna in this part, the design method of UWB array antenna is expounded, and the influence of the structure size of the Vivaldi array element on the performance of the antenna array is studied, and a phased array is designed using the Vivaldi antenna as the array element. The operating bandwidth of the array exceeds 10 times the frequency range and has good scanning performance. In addition, a miniaturized Vivaldi array antenna with low profile and an all-metal strongly coupled Vivaldi array antenna. The study on the strong Coupling Dipole phased Array Antenna and the fragment phased Array Antenna in this part, a triple-frequency range dipole phased array is presented, and a miniaturized coplanar Barron is designed for the array. Aiming at the defects of the traditional antenna design method, this paper presents an optimized antenna design method combining genetic algorithm and electromagnetic simulation software. The designed strong coupling fragment antenna can have better performance. Using this method, the triple-frequency range dipole antenna is optimized to a fragment antenna with a five-fold frequency path bandwidth, and the feasibility of the method is verified.
【学位授予单位】：南京理工大学
【学位级别】：硕士
【学位授予年份】：2017
【分类号】：TN821.8

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