小型化低耦合MIMO天线的设计

发布时间：2018-05-01 01:18

本文选题：小型化 + 低耦合　；参考：《电子科技大学》2015年硕士论文

【摘要】：在无线通信飞速发展的今天,无线通信技术已经成功步入4G通信时代。由于人们对高速和高质量的数据服务的需求越来越多,因此人们对手机等移动终端天线的性能和尺寸提出了更高的要求。MIMO技术作为无线通信技术发展过程中不可或缺的技术,在提高系统信道容量和数据传输速率上有着独特的优势。然而随着移动终端小型化的发展趋势,如何在有限的空间内减小天线单元之间的相互耦合已经成为MIMO技术发展过程中不得不面对的核心问题。本文主要研究内容如下:1.基于超材料结构加载的MIMO天线。本文基于超材料结构的工作机理,利用调整超材料结构的尺寸能吸收不同频段电磁波的优点,将超材料结构应用于紧凑型MIMO天线中,从而设计了一款具有高隔离度的MIMO天线,其中该MIMO天线的工作带宽能有效地覆盖5.8-GHz WLAN的频段。2.基于枝节加载的双频带MIMO天线。本文基于枝节加载的工作原理,利用枝节加载能有效地改变地板电流分布,减小天线端口间的耦合电流,从而提高天线的端口隔离度的优点,设计出了一款基于枝节加载的二单元双频带MIMO天线,该天线的工作带宽能有效覆盖整个WLAN频段。3.基于合理布局的多元超宽带MIMO天线。本文利用合理布局单元天线的方法设计了一款超宽带MIMO天线。该MIMO天线由于其独特的布局在没有使用任何其他去耦方法的情况下,仍能在小尺寸面积内达到较高的隔离度,比其他需要添加复杂结构的去耦方法更具优势。该MIMO天线在3.1GHz-10.6GHz内的超宽带工作频段获得较高的隔离度。4.对本论文的研究工作和内容进行总结并对后续工作进行了展望。
[Abstract]:With the rapid development of wireless communication, wireless communication technology has entered the 4G communication era. Due to the increasing demand for high-speed and high-quality data services, people put forward higher requirements for the performance and size of mobile terminal antennas, such as mobile phones. MIMO technology is an indispensable technology in the development of wireless communication technology. It has unique advantages in improving system channel capacity and data transmission rate. However, with the development of miniaturization of mobile terminals, how to reduce the coupling between antenna elements in limited space has become the core problem in the development of MIMO technology. The main contents of this paper are as follows: 1. MIMO antenna based on metamaterial structure. Based on the working mechanism of metamaterial structure and the advantage of adjusting the size of metamaterial structure to absorb electromagnetic waves in different frequency bands, the supermaterial structure is applied to compact MIMO antenna and a MIMO antenna with high isolation is designed in this paper. The bandwidth of the MIMO antenna can effectively cover the frequency band. 2. 2 of the 5.8-GHz WLAN. Dual band MIMO antenna based on branch loading. In this paper, based on the working principle of branch loading, using branch loading can effectively change the distribution of floor current, reduce the coupling current between antenna ports, and improve the isolation of antenna ports. A two-element dual-band MIMO antenna based on branch loading is designed. The bandwidth of the antenna can effectively cover the whole WLAN band. 3. Multiple UWB MIMO Antenna based on reasonable layout. In this paper, a UWB MIMO antenna is designed by using a reasonable layout of the antenna. Because of its unique layout, the MIMO antenna can still achieve high isolation in a small area without any other decoupling methods, which is superior to other decoupling methods which need to add complex structures. The MIMO antenna has a high isolation in the UWB operating frequency band of 3.1GHz-10.6GHz. The research work and content of this paper are summarized and the future work is prospected.
【学位授予单位】：电子科技大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：TN828

【共引文献】