谐振环对多天线系统隔离度改善的研究

发布时间：2018-06-22 19:34

  本文选题：谐振环 + 多天线　； 参考：《南京信息工程大学》2017年硕士论文

【摘要】：MIMO技术作为LTE的关键技术,通过增加天线数量的方式来提高信道容量,大大提升了天线系统的性能。然而在无线终端的有限空间中使用多天线技术,会造成天线之间的相互干扰严重,导致方向图恶化,辐射效率降低等一系列问题。谐振环作为一种“超材料”能通过适当的摆放和调整起到改善天线隔离度的目的。本文针对MIMO天线系统存在的天线间干扰问题。研究了利用谐振环这种“超材料”来改善天线间隔离度的方法。将其应用在了 2-MIMO, 8-MIMO,10-MIMO手机天线中,通过适当调整,谐振环取得了不错的去耦效果。最后将周期性谐振环实验性的应用在2-MIMO微带天线中,以一种“隔离屏”的形式存在,同样起到了改善隔离度的目的。本文内容布局分以下几部分:第一,介绍了国内外有关谐振环的研究现状和研究的意义;第二,介绍了谐振环的由来,谐振环的特性参数,以及谐振环的去耦原理;第三,分别将谐振环应用在2-MIMO天线、8-MIMO天线、10-MIMO天线中,通过适当的调试,使其达到改善天线隔离度的目的;第四,最后设计了一种具有周期性谐振环结构的“隔离屏”,将“隔离屏”放置在2-MIMO微带天线之间,成功的改善了天线的隔离度。
[Abstract]:As a key technology of LTE, MIMO increases the channel capacity by increasing the number of antennas, and greatly improves the performance of antenna systems. However, the use of multi-antenna technology in the limited space of wireless terminals will cause serious interference between antennas, lead to the deterioration of pattern, and reduce the radiation efficiency and a series of problems. As a kind of metamaterial, resonant ring can improve antenna isolation by proper placement and adjustment. In this paper, the problem of inter-antenna interference in MIMO antenna systems is discussed. The method of improving the isolation between antennas by using the resonant ring as a "metamaterial" is studied. It has been applied to 2-MIMO-8-MIMO-10-MIMO mobile phone antenna, and the resonant ring has achieved good decoupling effect through proper adjustment. Finally, the experimental application of periodic resonant ring in 2-MIMO microstrip antenna, which exists in the form of "isolation screen", also plays the purpose of improving the isolation degree. The content of this paper is divided into the following parts: firstly, the research status and significance of the resonant ring at home and abroad are introduced; second, the origin of the resonant ring, the characteristic parameters of the resonant ring and the decoupling principle of the resonant ring are introduced; third, the decoupling principle of the resonant ring is introduced. The resonant ring is applied to 2-MIMO antenna, 8-MIMO antenna and 10-MIMO antenna respectively. Through proper debugging, the isolation degree of the antenna is improved. Fourthly, a kind of "isolation screen" with periodic resonant ring structure is designed. The isolation screen is placed between 2-MIMO microstrip antennas, which improves the isolation of the antenna successfully.
【学位授予单位】：南京信息工程大学
【学位级别】：硕士
【学位授予年份】：2017
【分类号】：TN919.3

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