多频段MIMO终端天线设计
发布时间:2018-06-22 17:34
本文选题:手机天线 + 小型化 ; 参考:《电子科技大学》2014年硕士论文
【摘要】:随着3G移动通信网络的大规模铺设和LTE的逐步发展,对应用较广的移动通信终端手机天线的设计提出了越来越苛刻的要求,如超薄、超小、多频段工作等等,因此,研究小型、多频手机天线具有较大的实际意义。另外,为了提高频谱资源有限的频谱利用率以及通信容量,多输入多输出(MIMO)手机天线的设计也显得愈加紧迫和困难。一般来说,实际中预留给手机天线的设计空间大约为15×30×5 mm3,同时,所设计的手机天线要能够覆盖现有的GSM/UMTS/LTE中的常用通信频段。本文首先简述了手机天线的研究背景及进展。结合手机终端设备的固有特点指出了该天线设计中的一般考虑,进而分别讨论了三种主要的宽带技术—宽带匹配网络技术、集总元件加载技术以及分布式效应匹配技术—的具体工作原理和在终端天线设计中的应用。接着,分析讨论了辅助设计软件Ansoft HFSS的使用,这包括手机天线设计中结构模型的建立,边界条件、激励端口的设置,以及结果分析与参数的优化设计。接着,本文根据不同的集总电感加载对天线输入阻抗匹配的不同影响,通过理论分析和建模仿真优化,把相应的集总电感直接加载在天线辐射元中的合理位置,完成能够覆盖GSM850/900/DCS1800/PCS1900/UMTS2100/LTE2300频段的手机单天线的设计目的。为了更清晰地说明该天线的设计过程,本文讨论分析了该天线的工作原理和一些关键参数。其次,本文研究了开槽技术对提高多天线端口隔离度的机理作用,分析设计出一款能够覆盖DCS1800/PCS1900/UMTS2100/LTE2300/2500频段的MIMO手机天线的设计方案,且端口隔离度满足小于-15 dB的行业要求。然后,对该天线的结构参数和测量结果进行了分析,证明本文设计方案的可靠性和实用性。最后,本文着重讨论了终端MIMO天线的关键指标---相关性系数的计算,并给出了相应的计算流程图;基于上述MIMO天线方案,计算了相应的相关性系数;计算结果表明该方案的相关性系数满足行业指标要求。
[Abstract]:With the large-scale laying of 3G mobile communication network and the gradual development of LTE, more and more stringent requirements have been put forward for the design of mobile phone antenna, which is widely used in mobile communication terminal, such as ultra-thin, ultra-small, multi-band work and so on. Multi-frequency mobile phone antenna has great practical significance. In addition, in order to improve the spectrum efficiency and communication capacity of limited spectrum resources, the design of multiple input multiple output (MIMO) mobile phone antenna has become increasingly urgent and difficult. Generally speaking, the design space reserved for the mobile phone antenna is about 15 脳 30 脳 5 mm / 3 in practice. At the same time, the designed mobile phone antenna should be able to cover the common communication frequency band of GSM / UMTS / LTE. In this paper, the research background and progress of mobile phone antenna are introduced. Combined with the inherent characteristics of mobile terminal equipment, this paper points out the general considerations in the design of the antenna, and then discusses three main broadband technologies-broadband matching network technology. The principle of lumped component loading and distributed effect matching technology and its application in terminal antenna design. Then, the use of the auxiliary design software Ansoft is analyzed and discussed, which includes the establishment of the structure model, the boundary condition, the setting of the excitation port, the analysis of the results and the optimization of the parameters in the antenna design of the mobile phone. Then, according to the different influence of different lumped inductance loading on antenna input impedance matching, through theoretical analysis and modeling simulation optimization, the corresponding lumped inductance is directly loaded in the reasonable position of antenna radiator. To complete the design of a single antenna that can cover the GSM 850 / 900 / DCS 1800 / PCS 1900 / UMTS 2100 / LTE2300 band. In order to explain the design process of the antenna more clearly, the working principle and some key parameters of the antenna are discussed and analyzed in this paper. Secondly, this paper studies the mechanism of slot technology to improve the isolation degree of multi-antenna ports, analyzes and designs a design scheme of MIMO mobile phone antenna which can cover DCS1800 / PCS1900 / UMTS2100 / LTE2300 / 2500 band, and the port isolation degree meets the industry requirements of less than -15 dB. Then, the structural parameters and measurement results of the antenna are analyzed, which proves the reliability and practicability of the design scheme. Finally, this paper mainly discusses the calculation of correlation coefficient, which is the key index of terminal MIMO antenna, and gives the corresponding flow chart, and calculates the correlation coefficient based on the above MIMO antenna scheme. The calculation results show that the correlation coefficient of the scheme meets the requirements of the industry index.
【学位授予单位】:电子科技大学
【学位级别】:硕士
【学位授予年份】:2014
【分类号】:TN828.6
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本文编号:2053605
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