【摘要】：新型人工媒質(zhì)是近年來(lái)發(fā)展起來(lái)的一種新型材料,它由于廣泛的用途而備受人們關(guān)注,它所體現(xiàn)出的電磁特性顛覆了人們對(duì)傳統(tǒng)領(lǐng)域中電磁材料的理解。新型人工媒質(zhì)又被稱為超常材料、有特異材料、左手材料、負(fù)折射率材料、異向材料等各種新型材料,這都是基于其獨(dú)特的物理特性而命名。這種材料的結(jié)構(gòu)與光子晶體材料的構(gòu)成方法與原理有類似之處,都是通過(guò)改變材料的物理結(jié)構(gòu)來(lái)實(shí)現(xiàn)不同的物理特性。本文首先介紹了新型人工媒質(zhì)的研究背景、研究意義以及國(guó)內(nèi)外對(duì)新型人工媒質(zhì)的研究動(dòng)態(tài)。由于本文主要的內(nèi)容是基于多層新型人工媒質(zhì)寬帶濾波器來(lái)闡述的,所以本文對(duì)濾波器的研究現(xiàn)狀以及濾波器的分類做了簡(jiǎn)單的介紹。同時(shí)又介紹了文章中主要用到的電磁算法,其中主要包括有限元法。由于所有的電磁算法都是基于麥克斯韋方程組來(lái)展開的,所以我們對(duì)麥克斯韋方程做了簡(jiǎn)單了解。同時(shí)又介紹了電磁邊界條件相關(guān)知識(shí)。本文主要從三個(gè)方面進(jìn)行分析研究:多層新型人工媒質(zhì)寬帶濾波器的數(shù)值解析、對(duì)這種寬帶濾波器的進(jìn)一步優(yōu)化以及多層新型人工媒質(zhì)的極化敏感性的研究。針對(duì)第一部分,主要的工作就是開口諧振環(huán)的等效傳輸線理論及其等效電路理論的提出以及多層超常材料結(jié)構(gòu)的傳輸矩陣求解的matlab方程的編寫;第二部分主要的內(nèi)容就是優(yōu)化結(jié)構(gòu)的設(shè)計(jì)與仿真分析;第三部分主要是用于研究極化敏感性的多層超常材料的結(jié)構(gòu)設(shè)計(jì)及其仿真分析,其中關(guān)鍵點(diǎn)在于仿真分析過(guò)程中的入射角以及邊界條件的設(shè)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.
【學(xué)位授予單位】：西安電子科技大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2015
【分類號(hào)】：TN713

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