太赫兹波段的光子晶体微带天线的设计

发布时间：2018-05-05 08:20

本文选题：太赫兹 + 微带天线　；参考：《中北大学》2015年硕士论文

【摘要】：本论文主要是在光子晶体的理论基础上，利用MATLAB仿真软件对异质镜像对称结构的一维光子晶体在THz波段中的带隙结构和光学传输特性进行仿真和分析。同时利用光子晶体的光子带隙特性以及光子晶体的缺陷模型，设计了一款将一维光子晶体缺陷模型应用在微带天线上的天线，并且所设计的微带天线的中心工作频率是0.2THz，，利用三维电磁仿真软件HFSS仿真设计和分析光子晶体微带天线，也利用软件Origin分析光子晶体微带天线的仿真结果，在理论上对设计的天线进行了仿真分析。论文的主要内容具体如下： (1)分别详细地介绍了光子晶体和微带天线的理论基础，包括光子晶体概念、光子晶体的结构、光子晶体的计算方法以及光子晶体的应用；还包括微带天线的定义、微带天线的辐射机理、天线的性能参数和几种典型的微波光子晶体天线。 (2)基于一维介质中的传输矩阵法研究了一维光子晶体(ABBA)N在0.1THz~0.9THz频段处的光子带隙的变化。在不考虑材料的色散和偏振的前提下，在0.1THz~0.9THz范围内，分析了光子晶体的周期数、薄层厚度以及入射角对该光子晶体结构透射谱的影响。结果表明：在太赫兹频段处周期数对光子带隙几乎没有影响，薄层的总厚度随着缩放比例的增加光子带隙的数目在不断地增加，并且发现光子带隙的宽度在不断变宽，而随着入射角的增大THz波段的光子带隙向着高频方向移动。这为THz器件的研究起到一定的作用。 (3)将光子晶体应用到微带天线上，利用光子晶体的光子带隙特性，提高微带天线的性能。通过HFSS软件设计了一款中心频率在0.2THz的一维光子晶体微带天线，并且对比了光子晶体微带天线与普通微带天线的增益的变化，以及光子晶体的周期层数对设计的天线的影响，同时也分析了光子晶体与微带天线的距离对天线的S11的影响。这款设计的光子晶体微带天线工作的频带在THz频段，为THz频段应用在通信中提供一定的参考意义。
[Abstract]:Based on the theory of photonic crystals, the band gap structure and optical transmission characteristics of one-dimensional photonic crystals with heterogeneous mirror symmetry structure in THz band are simulated and analyzed by MATLAB simulation software. Based on the photonic band gap characteristics of photonic crystal and the defect model of photonic crystal, a one-dimensional photonic crystal defect model is designed for microstrip antenna. The center working frequency of the designed microstrip antenna is 0.2THz. the photonic crystal microstrip antenna is simulated and analyzed by using three-dimensional electromagnetic simulation software HFSS, and the simulation results of the photonic crystal microstrip antenna are also analyzed by the software Origin. The antenna is simulated and analyzed theoretically. The main contents of the thesis are as follows: The theoretical basis of photonic crystal and microstrip antenna are introduced in detail, including the concept of photonic crystal, the structure of photonic crystal, the calculation method of photonic crystal and the application of photonic crystal, and the definition of microstrip antenna. Radiation mechanism of microstrip antenna, antenna performance parameters and several typical microwave photonic crystal antennas. (2) based on the transfer matrix method in one-dimensional medium, the change of photonic band gap in 0.1THz~0.9THz band of one-dimensional photonic crystal (ABBAN) is studied. Without considering the dispersion and polarization of the material, the effects of the number of photonic crystal periods, the thickness of thin layer and the incident angle on the transmission spectrum of the photonic crystal structure are analyzed in the 0.1THz~0.9THz range. The results show that the number of periods at terahertz band has little effect on the photonic band gap, and the total thickness of the thin layer increases with the increase of the scaling ratio, and the width of the photonic band gap becomes wider and wider. The photonic band gap in THz band moves towards high frequency with the increase of incidence angle. This plays an important role in the research of THz devices. The photonic crystal is applied to the microstrip antenna and the photonic band gap property of the photonic crystal is used to improve the performance of the microstrip antenna. A one-dimensional photonic crystal microstrip antenna with center frequency in 0.2THz is designed by HFSS software. The gain of photonic crystal microstrip antenna is compared with that of ordinary microstrip antenna, and the effect of the number of periodic layers of photonic crystal on the designed antenna is compared. The influence of the distance between photonic crystal and microstrip antenna on S _ 11 is also analyzed. The designed photonic crystal microstrip antenna operates in the THz band, which provides a reference for the application of the THz band in communication.
【学位授予单位】：中北大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：TN822

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