多模多频段5G智能手机多天线系统及其关键技术研究

To meet the needs of the future mobile internet traffic increased by 1000 times, people have begun to study the fifth generation (5G) mobile communication technologies. In the future, after the 5G mobile communication systems would have been commercialized, the communication systems with the 2G/3G/4G/5G standards will need to coexist. The 5G smartphones should have the following three types of multiple-input multiple-output (MIMO) antenna systems: the MIMO antenna system operating at the bands of 698-960 and 1710-2690MHz, the massive MIMO antenna system, and the phased array MIMO antenna system operating at the high frequency / millimeter wave frequency band. Because of the contradiction between the miniaturization of the terminal and the requirements of the types, quantity and independence of the antenna element, the realization of the multiple antenna systems on the terminal is very challenging, which has become the bottleneck of the development of the 5G technologies. To master the core key technologies, this project will study on the 5G smartphone multiple antenna system and its common key technologies, i.e., the antenna element technology, the multiple antenna integration technology, and the decoupling technology. To verify the correctness of the theoretical analysis and the feasibility of the novel antennas proposed in this project, a prototype with the above three types of MIMO antenna systems on the same multimode and multiband smartphone and with independent intellectual property rights will be developed and realized. The results of this project will provide the key technical support for the realization of the 5G mobile communication system.

为了满足未来移动互联网流量增加1000倍的发展需求，国内外已开始进行第五代（5G）移动通信技术的研究。未来5G移动通信系统商用后，2G/3G/4G/5G等多种标准或多种制式的移动通信系统将需要同时存在，5G智能手机应同时具有698-960和1710-2690MHz频带的MIMO天线、大规模MIMO天线、高频段/毫米波相控阵MIMO天线。由于终端的小型化与天线单元的种类、数量、独立性要求间的矛盾，使得终端上多天线的实现极具挑战性，已成为5G技术发展的瓶颈。本项目拟对5G智能手机多天线系统及其具有共性的关键技术--天线单元技术、多天线的集成技术、天线单元之间的解耦技术--开展深入研究，掌握有关核心关键技术。为了验证理论分析的正确性和新型天线的可实现性，拟研制出具有自主知识产权的、同时具有上述三种MIMO天线的多模多频段智能手机多天线系统样机。研究结果将为5G移动通信系统的实现提供关键技术支撑。

针对5G移动通信系统商用后，2G/3G/4G/5G等多种标准的移动通信系统需要共存的需求，本项目对5G智能手机多天线系统及其具有共性的关键技术--天线单元技术、多天线的集成技术、天线单元之间的解耦技术--开展了研究。在智能手机天线单元及其宽带/多频段小型化技术方面，采用匹配电路/耦合馈电结合接地枝节/多枝节/多模式等小型化和宽带/多频段化方法，提出并实现了六种适用于金属边框智能手机的天线单元和三种低剖面宽带天线单元；在智能手机多天线系统及其宽带解耦技术方面，研究了工作在2G/3G/4G频段（698-960MHz和1710-2690MHz频带）的MIMO天线、工作在5G Sub-6GHz频段的大规模MIMO天线的智能手机多天线系统及其宽带解耦技术，提出了倒L形解耦地枝、空间布局结合公共的接地和背靠背的安装方式等低互耦技术，在此基础上结合其它去耦方法如正交模式法，提出并实现了五种适用于金属边框智能手机的宽带多天线系统和两种适用于智能手机的八单元微带MIMO天线系统；在智能手机毫米波天线方面，提出了两种适用于智能手机的毫米波相控阵天线；在以上研究的基础上，提出了一种同时具有三种MIMO天线的智能手机多天线系统，即具有工作在2G/3G/4G频段（包括698-960MHz和1710-2690MHz两个频带）的两单元MIMO天线、工作在5G Sub-6GHz频段的八单元MIMO天线和5G毫米波相控阵四单元MIMO天线。研究结果可为5G移动通信系统的实现提供关键技术。