基于新型人工媒质的宽带滤波器研究

发布时间：2019-05-27 22:05

【摘要】：新型人工媒质是近年来发展起来的一种新型材料,它由于广泛的用途而备受人们关注,它所体现出的电磁特性颠覆了人们对传统领域中电磁材料的理解。新型人工媒质又被称为超常材料、有特异材料、左手材料、负折射率材料、异向材料等各种新型材料,这都是基于其独特的物理特性而命名。这种材料的结构与光子晶体材料的构成方法与原理有类似之处,都是通过改变材料的物理结构来实现不同的物理特性。本文首先介绍了新型人工媒质的研究背景、研究意义以及国内外对新型人工媒质的研究动态。由于本文主要的内容是基于多层新型人工媒质宽带滤波器来阐述的,所以本文对滤波器的研究现状以及滤波器的分类做了简单的介绍。同时又介绍了文章中主要用到的电磁算法,其中主要包括有限元法。由于所有的电磁算法都是基于麦克斯韦方程组来展开的,所以我们对麦克斯韦方程做了简单了解。同时又介绍了电磁边界条件相关知识。本文主要从三个方面进行分析研究:多层新型人工媒质宽带滤波器的数值解析、对这种宽带滤波器的进一步优化以及多层新型人工媒质的极化敏感性的研究。针对第一部分,主要的工作就是开口谐振环的等效传输线理论及其等效电路理论的提出以及多层超常材料结构的传输矩阵求解的matlab方程的编写;第二部分主要的内容就是优化结构的设计与仿真分析;第三部分主要是用于研究极化敏感性的多层超常材料的结构设计及其仿真分析,其中关键点在于仿真分析过程中的入射角以及边界条件的设置。
[Abstract]:New artificial medium is a new type of material developed in recent years. It has attracted people's attention because of its wide range of uses. Its electromagnetic characteristics subvert people's understanding of electromagnetic materials in traditional fields. New artificial media, also known as supernormal materials, have special materials, left-handed materials, negative refractive index materials, reverse materials and other new materials, which are named because of their unique physical properties. The structure of this material is similar to the composition method and principle of photonic crystal material, all of which realize different physical properties by changing the physical structure of the material. In this paper, the research background, significance and research trends of new artificial media at home and abroad are introduced. Because the main content of this paper is based on the multi-layer new artificial medium broadband filter, the research status and classification of the filter are briefly introduced in this paper. At the same time, the electromagnetic algorithm mainly used in this paper is introduced, which mainly includes finite element method. Because all the electromagnetic algorithms are based on the Maxwell equations, we have a simple understanding of the Maxwell equations. At the same time, the related knowledge of electromagnetic boundary conditions is introduced. In this paper, three aspects are analyzed and studied: the numerical analysis of the new multi-layer artificial medium broadband filter, the further optimization of the broadband filter and the study of the polarization sensitivity of the multi-layer new artificial medium. In the first part, the main work is to propose the equivalent transmission line theory of open resonant ring and its equivalent circuit theory, and to compile the matlab equation for solving the transmission matrix of multi-layer supernormal material structure. The second part is the design and simulation analysis of the optimized structure. The third part is mainly used to study the structural design and simulation analysis of polarization sensitive multi-layer supernormal materials, in which the key point lies in the setting of incident angle and boundary conditions in the process of simulation analysis.
【学位授予单位】：西安电子科技大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：TN713

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