基于人工磁导体的低剖面天线及最优结构的研究
发布时间：2019-03-21 20:14
【摘要】：近些年来,超材料(Metamaterials)由于具有特殊的电磁特性在应用电磁学、固体物理学以及材料科学等方向受到越来越多的关注,已经成为当下研究的热点之一。所谓超材料是一些人工材料的总称,能实现自然界中一般材料所不具备的且具有实用价值的电磁特性。人工磁导体(Artificial magnetic conductors,AMC)就是一种典型的超材料,其在反射带隙内具有理想磁表面的性质,基于此特性在制作低剖面天线以及改善天线辐射性能方面有着巨大优势和应用前景,因此研究AMC结构有着极高价值。 半波振子天线由于全向辐射导致定向增益较低,不利于实际应用。为改善其缺点,需要在天线一侧加载反射面提高定向增益,为此本文以AMC结构应用于半波振子天线为背景,做了深入的探讨和研究。 本文首先给出了AMC结构的反射带隙形成机理,对影响反射带隙的重要参数进行了详细分析并得出相关结论。 其次设计了特定反射频率的AMC结构并应用于偶极子天线,在这其中为探寻AMC最优结构即天线定向增益达到最大,本文分别探讨了AMC结构贴片元素正方形排列、矩形排列以及接地板对定向增益的影响,并在此基础上提出了两种新型元素排列方式。最优AMC结构与加载理想电表面偶极子天线相比较,天线不仅实现了低剖面的实际应用需求,而且天线的定向增益提高了3.6dB。 最后为获得更高增益天线,本文将最优AMC结构应用于天线阵中。主要从两方面进行了研究：(1)分析了平行与共轴振子二元阵加载AMC结构与理想电表面的带宽以及定向增益的大小,从结果看加载前者的效果明显优于后者；(2)在相同的AMC结构上通过改变四元阵中天线单元的排列方式,寻求天线定向增益最大的排列方式。
[Abstract]:In recent years, the metamaterials have become one of the hot spots of the present study because of the special electromagnetic characteristics in the application of electromagnetics, solid physics and material science. The so-called metamaterial is a general term of some artificial materials, and can realize the electromagnetic characteristics that are not provided by the general materials in the natural world and have practical value. the artificial magnetic conductor (amc) is a typical supermaterial which has the property of the ideal magnetic surface in the reflected band gap, and has great advantages and application prospect in making the low-profile antenna and improving the radiation performance of the antenna based on the characteristic, So it is very valuable to study the AMC structure. The half-wave oscillator antenna is low in directional gain due to the omnidirectional radiation and is not beneficial to the actual In order to improve its disadvantages, it is necessary to load the reflecting surface on one side of the antenna to improve the directional gain. In this paper, the mechanism of the reflection band gap formation of the AMC structure is given, and the important parameters affecting the reflected band gap are analyzed in detail and the phase is obtained. In this paper, the AMC structure of the specific reflection frequency is designed and applied to the dipole antenna, in which, in order to find the optimal structure of the AMC, that is, the directional gain of the antenna reaches the maximum, the square arrangement, the rectangular arrangement of the patch elements of the AMC structure and the orientation of the ground plate are discussed in this paper. In this paper, two new types of elements are put forward based on the influence of gain the optimal amc structure is compared with the dipole antenna which is loaded with the ideal electric surface, the antenna not only realizes the practical application requirement of the low profile, but also the directional gain of the antenna is improved, 3.6dB. Finally, in order to get a higher gain antenna, the optimal AMC structure is presented in this paper It is applied in the antenna array. The main results are as follows: (1) The bandwidth of the loading AMC structure and the ideal electric surface of the parallel and coaxial vibrator binary array and the size of the directional gain are analyzed, and the effect of loading the former from the result is analyzed. and (2) searching for antenna directional gain by changing the arrangement mode of the antenna elements in the quaternary array on the same AMC structure,
【学位授予单位】：太原理工大学
【学位级别】：硕士
【学位授予年份】：2014
【分类号】：TN823.27
本文编号：2445281
[Abstract]:In recent years, the metamaterials have become one of the hot spots of the present study because of the special electromagnetic characteristics in the application of electromagnetics, solid physics and material science. The so-called metamaterial is a general term of some artificial materials, and can realize the electromagnetic characteristics that are not provided by the general materials in the natural world and have practical value. the artificial magnetic conductor (amc) is a typical supermaterial which has the property of the ideal magnetic surface in the reflected band gap, and has great advantages and application prospect in making the low-profile antenna and improving the radiation performance of the antenna based on the characteristic, So it is very valuable to study the AMC structure. The half-wave oscillator antenna is low in directional gain due to the omnidirectional radiation and is not beneficial to the actual In order to improve its disadvantages, it is necessary to load the reflecting surface on one side of the antenna to improve the directional gain. In this paper, the mechanism of the reflection band gap formation of the AMC structure is given, and the important parameters affecting the reflected band gap are analyzed in detail and the phase is obtained. In this paper, the AMC structure of the specific reflection frequency is designed and applied to the dipole antenna, in which, in order to find the optimal structure of the AMC, that is, the directional gain of the antenna reaches the maximum, the square arrangement, the rectangular arrangement of the patch elements of the AMC structure and the orientation of the ground plate are discussed in this paper. In this paper, two new types of elements are put forward based on the influence of gain the optimal amc structure is compared with the dipole antenna which is loaded with the ideal electric surface, the antenna not only realizes the practical application requirement of the low profile, but also the directional gain of the antenna is improved, 3.6dB. Finally, in order to get a higher gain antenna, the optimal AMC structure is presented in this paper It is applied in the antenna array. The main results are as follows: (1) The bandwidth of the loading AMC structure and the ideal electric surface of the parallel and coaxial vibrator binary array and the size of the directional gain are analyzed, and the effect of loading the former from the result is analyzed. and (2) searching for antenna directional gain by changing the arrangement mode of the antenna elements in the quaternary array on the same AMC structure,
【学位授予单位】：太原理工大学
【学位级别】：硕士
【学位授予年份】：2014
【分类号】：TN823.27
【参考文献】
相关期刊论文 前1条
1 闫敦豹;高强;付云起;张国华;袁乃昌;;改进的宽带人工磁导体结构[J];电波科学学报;2005年05期
，本文编号：2445281
本文链接：https://www.wllwen.com/kejilunwen/wltx/2445281.html
