摘要目前,第四代移动通信已经进入大规模商用化进程, 紧接而来的第五代移动通信成为全球研究热点,其中MIMO 技术成为其支撑技术之一。MIMO技术不仅提高了系统的频谱利用效率,而且提高了移动通信质量和传输速率。MIMO 天线的性能与天线单元的互耦质量息息相关。因此,本文首先基于信号干扰概念提出了耦合器去耦网络,从幅度和相位的角度分析了降低互耦的机理,设计并加工验证了这种宽带耦合器去耦网络的有效性。其次,分析设计了滤波器去耦网络,并将其与耦合器去耦网络进行比较,结果表明,耦合器去耦网络的设计更为方便,而且具有宽带特性。最后,针对多端口的 MIMO 天线,分析了28GHz 频段下不同的天线布局对MIMO 互耦的影响, 并进一步结合超材料结构进行去耦的理论分析与设计,获得了很好的隔离效果。 41641 毕业论文关键词 MIMO天线 低互耦 去耦网络 分集技术
Title The Analysis and Design of MIMO Antenna For Applications in 5G Communication
Abstract At the moment, the fourth generation mobile communication has been used extensively. The next coming generation of mobile communication has become a hot topic around the world, in which MIMO technology will play one of the most important roles, which takes many advantages, such as improving the spectrum capacity and transmission rate. All these performances depend much on the isolation of MIMO antenna elements. Therefore, this paper first presents coupler decoupling network based on signal-interference concept and analyses the operational principle from the perspective of magnitude and phase. Then, the filter-based decoupling network has been analyzed, and the comparisons between the above two kinds of decoupling networks indicate the coupler decoupling network one better candidate for application in the wideband MIMO antenna. Finally, the paper analyses the effects of different layouts of MIMO antenna in the band of 28GHz. Furthermore, by using metamaterial mushroom, high isolation has been realized for the referred MIMO antenna. Keywords MIMO Antenna Low Mutual Coupling Decoupling Network Diversity