应用于4G通信系统中多频段手机天线系统的研究

发布时间：2018-04-21 07:24

本文选题：手机天线 + 4G　；参考：《西南交通大学》2014年硕士论文

【摘要】：如今,手机移动通信早已经迈进3G时代,并开始向4G通信系统过渡。为满足人们对手机功能越来越多的需求,如高速数据传输、蓝牙、4G LTE等,天线设计趋势的方向转变为不断拓展天线的带宽。然而超宽带天线的低频都会受到天线尺寸的限制,因此如何在特定空间内设计出带宽足够宽的天线是业界的一大难题。另一方面,现代集成电路技术和工艺的迅猛发展使得电子产品也变得越来越小,其中天线作为无线通信设备中的终端部件,对小型化的实现亦是迫在眉睫。另外,手机辐射对人体造成的安全问题是大家关心的,SAR值已成为业界关心的强制性指标。首先,我们在有限空间内的适当位置上设计出能覆盖WLAN双频段的天线,并对其方向图和效率等其他指标进行研究。之后对天线进行实物加工,对其电性能进行验证。文中利用PIFA.单极子天线、loop等结构自身的特性,并利用耦合馈电、增加匹配网络等方式来增加天线带宽,在天线的两端分别设计能覆盖新增LTE频段的天线。设计的主天线支持LTE700/GSM850/900/DCS/PCS/UMTS/LTE2300/WiMax2500频段,副天线支持GSM900/DCS/PCS/UMTS/LTE2300频段。后期对主天线进行了实物加工,对其带宽、方向图、增益和效率等进行了测试。对由主天线和副天线的基本结构组成的LTE MIMO进行研究,对其带宽、隔离度和相关系数等值进行仿真分析,通过转换位置和变换天线形状等方式使得各项指标均达到平衡进而完成整个系统的设计。
[Abstract]:Today, mobile phone communication has entered the 3G era, and began to transition to 4G communication system. In order to meet the increasing demand for mobile phone functions, such as high-speed data transmission, Bluetooth 4G LTE and so on, the trend of antenna design is changing to expand the bandwidth of antenna. However, the low frequency of UWB antenna is limited by the antenna size, so how to design a wide enough bandwidth antenna in a specific space is a big problem in the industry. On the other hand, with the rapid development of modern integrated circuit technology and technology, electronic products become smaller and smaller. Antenna, as the terminal part of wireless communication equipment, is urgent to realize miniaturization. In addition, the safety problem caused by mobile phone radiation has become a mandatory target of concern to the industry. First of all, we design the antenna which can cover the dual band of WLAN in the proper position in the finite space, and study the pattern and efficiency of the antenna. After that, the antenna is processed in kind and its electrical performance is verified. PIFA. The characteristics of monopole antenna loop and other structures are analyzed. The coupling feed and matching network are used to increase the bandwidth of the antenna. The antennas which can cover the new LTE band are designed at each end of the antenna. The main antenna is designed to support the LTE700/GSM850/900/DCS/PCS/UMTS/LTE2300/WiMax2500 band and the secondary antenna to support the GSM900/DCS/PCS/UMTS/LTE2300 band. The main antenna was processed and its bandwidth, pattern, gain and efficiency were tested. The LTE MIMO, which is composed of the main antenna and the secondary antenna, is studied, and its bandwidth, isolation and correlation coefficient are simulated and analyzed. By changing the position and the shape of the antenna, all the indexes are balanced and the design of the whole system is completed.
【学位授予单位】：西南交通大学
【学位级别】：硕士
【学位授予年份】：2014
【分类号】：TN929.53

【参考文献】