移动终端多天线研究

发布时间：2018-05-18 09:29

本文选题：移动终端 + 多天线　；参考：《西安电子科技大学》2012年硕士论文

【摘要】：随着无线通讯事业以及移动通信业务规模和种类的飞速发展，需要传输的数据量在不断的增加，人们对高速数据传输的需求更加迫切，高容量、高速率、高稳定性的移动多媒体传输成为了一个令人神往的目标，也是一个急迫解决的难题。对于此，传统的单天线收发通信系统似乎显得有些力不从心，，幸而多天线移动通信技术的应用为解决该问题提供了全新的途径和契机。通过理论和实验的论证，多天线移动通信技术能在不增加带宽和额外功率的情况下成倍地提高移动通信系统的容量和通信质量，被认为是新一代无线通信技术的革命，在学术界和工业界引起了高度的重视。当然，有机遇就有挑战，多天线设计是多天线移动通信的关键技术之一，尤其在移动终端，要求在有限的空间内多天线之间的信号要具有低的相关性，而本文便围绕移动终端多天线设计这一主题展开了系统的研究。本文在介绍了多天线移动通信技术和移动终端多天线基本理论的基础上，详细阐述了移动终端多天线的设计方法，提出了适用于手机的三种不同形式的内置天线，并以此为素材对多天线隔离度与天线效率进行了系统的分析与讨论，总结了一种分析多天线系统中天线效率的新方法，并编写了相关程序，最后设计了一种新颖的隔离装置，成为改善天线间隔离度的新措施。首先，本文简要介绍了研究的相关背景，从回顾移动通信的发展历程，引出了多天线移动通信技术并作以简述，之后介绍了国内外多天线移动通信技术的研究现状。其次，介绍了移动终端多天线的设计要求，阐述了决定多天线布局的天线分集技术，给出了分集性能的衡量标准，在此基础上，提出了移动终端多天线设计思想与实现途径，并对移动终端多天线的分析数值方法进行简单的介绍。然后以手机作为移动终端设备的代表，根据其研究热点和发展趋势，对三种手机内置天线，包括倒F天线、平面倒F天线和环天线作了分析和说明，并对每种形式分别设计一款手机天线，为接下来的低频多天线研究作铺垫。最后利用文中设计的三种不同形式的手机天线组成双天线分集系统，从地板长度、共地耦合、空间耦合、不同形式天线的相互搭配等角度对实际模型进行仿真和分析，本质上认识和总结了手机低频分集天线系统中存在的关于隔离度和天线效率的问题。为方便多天线设计，文章针对多天线系统中的阻抗匹配是如何影响天线效率进行了研究和探讨，总结了一种分析双天线分集系统中主天线效率的方法。该方法通过将实际模型转换为等效电路进行分析，利用负载牵引法，并通过仿真结合编程的手段得到主天线等效率区域图，最终为双天线系统的设计提供最佳方案。最后，本文提出了一种新颖的隔离装置，该隔离装置单元结构简单小巧，面积仅为0.0002λ02，高度仅为0.003λ0，有效改善了移动终端天线间的隔离度。
[Abstract]:With the rapid development of wireless communication and the scale and type of mobile communication services, the amount of data needed to be transmitted is increasing. The demand for high speed data transmission is more urgent. High capacity, high speed, high stability mobile multimedia transmission has become a fascinating goal, and is also an urgent problem to be solved. In this case, the traditional single antenna transceiver communication system seems to be a bit incompetent. Fortunately, the application of multi antenna mobile communication technology provides a new way and opportunity to solve the problem. Through theoretical and experimental demonstration, multi antenna mobile communication technology can increase the mobility without increasing the bandwidth and extra power. The capacity and quality of communication system is considered as the revolution of the new generation of wireless communication technology, which has attracted great attention in academia and industry.
Of course, organic encounter is a challenge. Multi antenna design is one of the key technologies of multi antenna mobile communication. Especially in mobile terminals, the signal between multiple antennas in a limited space needs to have low correlation. In this paper, a systematic study is carried out around the theme of multi antenna design for mobile terminals. This paper introduces multiple antennas. Based on the basic theory of mobile communication and mobile terminal multi antenna, the design method of multi antenna for mobile terminal is elaborated in detail. Three different types of built-in antennas for mobile phones are proposed. In this paper, the isolation and efficiency of multi antenna are analyzed and discussed, and a multi antenna analysis is summarized. A new method of antenna efficiency in the system is developed, and related procedures are written. Finally, a novel isolation device is designed, which is a new measure to improve the isolation between antennas.
Firstly, the background of the research is briefly introduced. From the review of the development of mobile communication, the multi antenna mobile communication technology is introduced and a brief introduction is made. Then the research status of multi antenna mobile communication technology at home and abroad is introduced.
Secondly, the design requirements of multi antenna for mobile terminal are introduced, the antenna diversity technology which determines the multi antenna layout is expounded, and the measurement standard of diversity performance is given. On this basis, the idea of multi antenna design and implementation of mobile terminal is put forward, and the numerical method of multi antenna analysis of mobile terminal is briefly introduced.
Then the mobile phone is used as the representative of mobile terminal equipment. According to its research focus and development trend, three kinds of mobile phone built-in antennas, including inverted F antenna, planar inverted F antenna and ring antenna, are analyzed and explained, and a mobile antenna is designed for each form, which paves the way for the next low-frequency multi antenna research.
At last, the dual antenna diversity system is made up of three different forms of mobile phone antenna designed in this paper. The actual model is simulated and analyzed from the angle of floor length, common ground coupling, space coupling, and the collocation of different forms of antennas. In essence, the isolation and day of the low frequency diversity antenna system in mobile phone are essentially recognized and summarized. In order to facilitate the design of multiple antennas, this paper studies and discusses how impedance matching affects antenna efficiency in multi antenna systems. A method for analyzing the efficiency of the main antenna in a dual antenna diversity system is summarized. The method is analyzed by converting the actual model into an equivalent circuit and using the load traction method. By means of simulation and programming, the efficiency region diagram of the main antenna is obtained. Finally, it provides the best scheme for the design of the dual antenna system. Finally, a novel isolation device is proposed in this paper. The isolation device has a simple and compact unit structure, the area is only 0.0002 lambda 02 and the height is only 0.003 lambda 0, which effectively improves the isolation between the mobile terminal antennas. Degree of departure.
【学位授予单位】：西安电子科技大学
【学位级别】：硕士
【学位授予年份】：2012
【分类号】：TN929.5

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