基于电磁功能材料的左手传输线及性能研究

发布时间：2018-10-17 20:49

【摘要】：左手材料具有独特的电磁特性,可导致一系列非同寻常的电磁现象,如负折射、逆切伦科夫效应、逆多普勒效应等,可用于制备新颖的电磁设备,如“完美”透镜、隐身装置等,在改进传统的电磁器件方面也有广泛的应用前景。研发不同类型的左手材料是目前研究热点之一。本文的主要工作内容和贡献如下所述：(1)简要介绍左手材料的研究背景、发展现状和基本性质,特别介绍了左手传输线的研究过程和基本特征。(2)接着介绍传输线理论、转移矩阵方法和有效介质理论,这些是探讨、设计和分析新型左手传输线的理论基础。(3)在传输线理论基础上,分析了采用电磁功能材料来改变传输线手性特征的可能性。提出了在低通电路的线圈中填充负磁导率材料、电容器中填充负介电常数材料来构建左手传输线的方案。基于转移矩阵方法,通过数值模拟,探讨了所设计的左手传输线的基本电磁特征。(4)最后根据有效介质理论,研究了线状金属颗粒复合材料的电、磁响应特性,提出可利用线状金属颗粒与介电材料复合制备各向同性的左手材料,探讨了线状金属颗粒复合材料在制备左手传输线方而的可能应用。
[Abstract]:Left-handed materials with unique electromagnetic properties can lead to a series of unusual electromagnetic phenomena, such as negative refraction, inverse Cherenkov effect, inverse Doppler effect, etc., which can be used to prepare novel electromagnetic devices, such as "perfect" lenses. Stealth devices and so on, also have a wide application prospect in improving the traditional electromagnetic devices. Research and development of different types of left-handed materials is one of the hotspots at present. The main contents and contributions of this paper are as follows: (1) the research background, development status and basic properties of left-handed materials are briefly introduced, especially the research process and basic characteristics of left-handed transmission lines. (2) then the theory of transmission lines is introduced. The transfer matrix method and effective medium theory are the theoretical basis for discussing, designing and analyzing new left-handed transmission lines. (3) on the basis of transmission line theory, the possibility of using electromagnetic functional materials to change the chiral characteristics of transmission lines is analyzed. The scheme of constructing left-handed transmission line by filling negative permeability material in the coil of low pass circuit and filling negative dielectric constant material in capacitor is proposed. Based on the transfer matrix method and numerical simulation, the basic electromagnetic characteristics of the designed left-handed transmission line are discussed. (4) finally, according to the effective medium theory, the electrical and magnetic response characteristics of the linear metal particle composite are studied. It is suggested that isotropic left-handed materials can be prepared by combining linear metal particles with dielectric materials. The possible applications of linear metal particle composites in preparing left-handed transmission lines are discussed.
【学位授予单位】：南京邮电大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：TB34

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