多层介质覆盖背腔缝隙天线研究

发布时间：2019-03-30 08:05

【摘要】：随着宽带雷达系统的使用越来越广泛,在保持和完善功能的前提下,宽带雷达系统在体积、重量、功耗和成本等方面的要求越来越高,其总体趋势是向着高性能、小型化发展。因此,天线作为宽带雷达系统的关键部件,其小型化、轻量化、共形化技术也日益受到关注。因此研究宽带、高效的天线对宽带雷达系统有着非常重要的意义。本文主要研究一种具有介质谐振器结构的新型背腔缝隙阵列天线。该天线具有带宽宽,效率高的特点,可以为下一代宽带雷达系统研制提供有力的技术支撑。首先,本文分别对背腔缝隙天线、介质谐振器的研究背景和发展现状作了详细的总结,并给出了本文的章节安排。其次,本文对FDTD算法的基本原理进行了简要的介绍,在此基础上设计了针对本文所研究天线的FDTD仿真方法,并通过算例计算,验证了所设计算法的有效性。再次,本文免疫遗传优化算法作了简要的介绍,对多层介质覆盖的背腔缝隙天线单元的辐射机理进行了进行了研究,并对天线的主要参数的影响规律作了简要论述。通过优化算法得到天线模型参数,在此基础上加工制作了天线单元实物,实测数据与仿真数据吻合。再次,本文对所设计的天线阵列的整体结构及馈电网络进行了详细的介绍及分析,并给出了仿真结果及实物验证。最后,给出了天线的几种扩展形式的研究,为下一步的工作进行了铺垫。
[Abstract]:With the wide use of broadband radar system, the requirements of broadband radar system in volume, weight, power consumption and cost are getting higher and higher on the premise of maintaining and perfecting its function. The general trend of broadband radar system is towards high performance and miniaturization. Therefore, antenna as the key component of wideband radar system, its miniaturization, lightweight, conformal technology has been paid more and more attention. Therefore, it is very important to study broadband and efficient antenna for broadband radar system. In this paper, a novel backcavity slot array antenna with dielectric resonator structure is studied. The antenna has the characteristics of wide bandwidth and high efficiency, which can provide a powerful technical support for the development of the next generation broadband radar system. Firstly, the research background and development status of backcavity slot antenna and dielectric resonator are summarized in detail, and the chapter arrangement of this paper is given. Secondly, the basic principle of FDTD algorithm is briefly introduced in this paper. On this basis, the FDTD simulation method for the antenna studied in this paper is designed, and the validity of the proposed algorithm is verified by an example. Thirdly, the immune genetic optimization algorithm is briefly introduced in this paper, and the radiation mechanism of multi-layer dielectric covered backcavity slot antenna element is studied, and the influence rule of the main parameters of the antenna is briefly discussed. The parameters of the antenna model are obtained by optimizing the algorithm, and the antenna element is fabricated on the basis of the optimization algorithm. The measured data are in agreement with the simulation data. Thirdly, the whole structure of the antenna array and the feed network are introduced and analyzed in detail, and the simulation results and physical verification are given. At last, several extended forms of antenna are studied, which will pave the way for further work.
【学位授予单位】：国防科学技术大学
【学位级别】：硕士
【学位授予年份】：2014
【分类号】：TN823.24

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