《双频MIMO天线的解耦设计论文设计》由会员分享，可在线阅读，更多相关《双频MIMO天线的解耦设计论文设计（73页珍藏版）》请在金锄头文库上搜索。
1、Contents双频MIMO天线的解耦设计目 录ContentsIII中 文 摘 要VABSTRACTV第一章 绪论81.1 课题研究的背景及意义81.2 国内外研究现状91.2.1 天线的缺陷地解耦101.2.2 中和线技术解耦121.2.3 添加枝节结构解耦151.2.4 采用谐振结构解耦171.3 论文的主要工作及结构安排19第二章 枝节解耦的MIMO天线212.1 引言212.2 双频PIFA天线的设计222.2.1 天线结构222.2.2 天线的仿真结果252.3 添加I型枝节解耦设计272.3.1添加I型枝节解耦的天线结构272.3.2添加I型枝节的仿真结果分析282.4 添加T型
2、枝节解耦设计302.4.1 添加T型枝节解耦的天线结构302.4.2 参数分析322.3.5 仿真和测量结果342.5 本章小结36第三章 中和线解耦的MIMO天线383.1 引言383.2 中和线解耦原理383.3 中和线解耦MIMO天线403.3.1 中和线解耦的MIMO天线结构403.3.2 天线表面电流分布图和幅度相位分析413.3.3 中和线参数分析433.4 本章总结454.1 引言464.2 四单元MIMO天线474.2.1 四单元天线结构474.2.2 天线表面电流分析494.2.3 天线仿真分析514.3 本章总结52第五章 总结53参考文献54攻读硕士学位期间取得的研究成果
3、及参与的科研项目62致谢63Contents Chinese AbstractIABSTRACTIIIChapter 1 Introduction11.1 Background and significance of the research101.2 Domestic and foreign research status111.2.1 Defect decoupling of antennas111.2.2 Decoupling of Medium and Line Technologies141.2.3 Added branch structure decoupling181.2.4 D
4、ecoupling of resonant structures201.3 Main Work and Structure of the Paper23Chapter 2 Frequency Reconfigurable MIMO Antenna242.1 foreword242.2 MIMO Antenna Design252.3 Dual-frequency PIFA antenna262.3.1 antenna structure 262.3.2 antenna decoupling structure282.3.3 Simulation and measurement results2
5、92.4 To add T decoupled PIFA antenna322.4.1 antenna structure 322.4.2 parameter analysis 342.4.3 Simulation and measurement results352.5 Summary of this chapter37Chapter 3 MIMO Antenna for Neutralizing Line Decoupling383.1 foreword383.2 The derivation of the principle of neutralizing line decoupling
6、383.3 Decoupling MIMO Antenna393.3.1 MIMO antenna structure with neutralizing line decoupling393.3.2 Current distribution and amplitude phase analysis of antenna surface403.3.3 Parametric Analysis of Medium and Line Dimensions403.3.4 Simulation and measurement results403.4 Summary of this chapter41C
7、hapter 4 Four cell MIMO antenna414.1 foreword424.2 Four cell MIMO antenna434.2.1 Four cell MIMO antennastructure434.2.2 Current Analysis on Antenna Surface444.2.3 Antenna Simulation Analysis464.3 Summary of this chapter48Chapter 5 Summary40Reference41Research Achievements During the Master Period48A
8、cknowledgemant49Personal Profiles50Letter of Commitment51Authorization Statement52第一章绪论中 文 摘 要多输入多输出（MIMO）天线技术是5G无线通信领域的关键技术之一，其技术可实现空间分集、空间复用和波束赋用等性能，可以提高信号传输速率，增大信道容量，提高频谱利用率。但是在尺寸很小的移动设备中放置多根天线，因为近距离产生的地表表面波和空间辐射波，会使天线彼此之间产生干扰，使天线单元间发生强烈的互耦，增大天线间的相关性使无线通信系统得不到预期的工作效果。因此，提高天线单元之度的隔离度是多天线的核心问题。本论文将
9、重点研究降低MIMO天线，主要工作可概括如下：1. 首先设计了一个具有二个端口的双频带MIMO天线，工作频段覆盖WLAN（2.4 GHz -2.48 GHz、5.15 GHz -5.35 GHz、5.725 GHz5.825 GHz）频带。单元天线采用印刷单极的形式，低频谐振单元为倒F天线，通过增加短的辐射贴片，用以产生高频谐振，实现双频工作。增加T型枝节将天线的隔离度提高到25dB以上，天线单元之间的相互影响得到很好的抑制，从而提高天线单元间的隔离度。2. 设计了一利用中和线来解耦的MIMO天线。分别在天线接地板上和馈电微带线上加载对应谐振频率约为0.5波长的中和线，宽度为0.3mm，采用微
10、带线进行馈电，较长的加载在微带线上的中和线用来改善低频处的隔离，较短的加载在天线接地板上的中和线用来改善高频处的隔离，隔离度大于30dB，能够实现天线的全向辐射。3. 设计了一个四单元MIMO天线。将二单元天线对称放置得到了四单元天线，天线结构在天线接地板上开了两个对称的矩形槽来改善高频的隔离，在槽上增加T型枝节来增加带宽，又在微带线上增加了弯折了5次的中和线来降低低频处的耦合，最终实现了2.41GHz-6.7GHz的阻抗带宽，依然可以覆盖WLAN频段，在谐振工作点上两两端口彼此之间的隔离度均高于25dB。关键词： MIMO天线；PIFA天线；中和线技术；隔离度ABSTRACT multi-i
11、nput and multi-output (MIMO) antenna technology is one of the key technologies in the new generation wireless communication field. its technology can realize the performance of space diversity, space multiplexing and beam assignment, and then improve the signal transmission quality and spectrum util
12、ization. However, many antennas are placed in mobile devices with limited size, because the surface surface wave and space radiation wave produced at close range will cause the antenna to interfere with each other, make the antenna unit have strong mutual coupling, and increase the correlation betwe
13、en antennas so that the wireless communication system can not get the expected working effect. Therefore, improving the isolation of antenna elements is the core problem of multi-antenna.At the same time, we focus on reducing MIMO antenna. The main work can be summarized as follows:1. we first desig
14、n a dual-band MIMO antenna with two ports. the operating frequency band covers the WLAN (2.4 ghz-2.48 ghz ,5.15 ghz-5.35 ghz ,5.725 ghz-5.825 ghz) frequency band. a unit antenna is in the form of printed monopole, and the low frequency resonant unit is an inverted F antenna. by adding a short radiat
15、ion patch, it is used to generate high frequency resonance and realize dual frequency operation. The isolation of antenna is increased to more than 25 dB by increasing the T branch, and the interaction between antenna elements is well suppressed, thus increasing the isolation between antenna elements Isolated.2. a MIMO antenna using neutralizing lines to decouple is designed. the neutral line with corresponding resonant frequency
