针对人工电磁材料的测试理论和方法研究

发布时间：2018-01-29 12:21

本文关键词： 新型人工电磁材料同轴线光学变换散射参数提取外部隐形衣介质环　出处：《兰州大学》2015年硕士论文　论文类型：学位论文

【摘要】：新型人工电磁材料是一种人工复合材料,其电磁特性取决于材料的微结构,和它本身的构成材料无关。它拥有着自然界常规材料所不具有的优异物理性质,对电磁波有着超强的控制能力。同轴线作为电磁波传输中的一种重要媒质,应用在许多重要领域。本文基于散射参数测量的参数提取方法,对一个外部隐形衣和同轴线测试系统进行了相关的研究和分析。介绍了新型人工电磁材料、新型人工电磁材料器件的研究背景和发展历史,以及新型人工电磁材料的特点和实现方法,并对实现隐形的机理作了相关解释。文章还阐述了同轴线的有关知识和传输特性。通过对经典的光学变换理论的解释,进一步来研究以此为理论依据所制备的一个外部隐形衣。由于解析的方法很难获得新型人工电磁材料的电磁表达式,我们使用了基于散射参数测量的参数提取方法,来对它进行相关分析。文章利用矢量网络分析仪和射极跟随器对外部隐形衣测试电路进行了改进,并通过仿真软件对它进行研究,比较测试和仿真结果。通过对同轴线测试系统的研究,证明了基于散射参数测量的同轴线测试法对于研究材料电磁特性的可行性。利用仿真反演的方法,以及与理论值的对比,我们得到了不同情况下介质环的电磁参数的误差,这为后期实测提供了误差数据的参考。我们的研究表明,基于散射参数测量的参数提取方法,在测试人工电磁材料的属性上,具有操作简单、容易实现的优势,有着重要的实际应用价值。随着新型人工电磁材料器件发展的美好前景,定会在未来发挥越来越重要的作用。
[Abstract]:The new artificial electromagnetic material is a kind of artificial composite material, its electromagnetic property depends on the microstructure of the material and has nothing to do with its own constituent material. Coaxial line, as an important medium in electromagnetic wave transmission, is applied in many important fields. The parameter extraction method based on scattering parameter measurement is presented in this paper. The related research and analysis of an external cloak and coaxial testing system are carried out. The research background and development history of the new artificial electromagnetic material and the new artificial electromagnetic material device are introduced. And the characteristics and realization method of the new artificial electromagnetic material. The mechanism of realizing invisibility is explained. The knowledge and transmission characteristics of coaxial line are also described. The classical optical transformation theory is explained. An external cloak based on this theory is further studied. It is difficult to obtain the electromagnetic expression of the new artificial electromagnetic material by analytical method. We use the parameter extraction method based on scattering parameter measurement to analyze its correlation. The external cloak test circuit is improved by using vector network analyzer and emitter follower. And through the simulation software to carry on the research, compares the test and the simulation result, through to the coaxial line test system research. The feasibility of the coaxial line measurement method based on scattering parameter measurement for studying the electromagnetic properties of materials is proved. The method of simulation inversion is used and compared with the theoretical values. We get the error of electromagnetic parameters of dielectric ring under different conditions, which provides a reference for the later measurement. Our research shows that the parameter extraction method based on scattering parameter measurement. In testing the properties of artificial electromagnetic materials, it has the advantages of simple operation, easy to realize, and has important practical application value. With the development of new artificial electromagnetic materials devices, there is a bright future. Will certainly play an increasingly important role in the future.
【学位授予单位】：兰州大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：TB33

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