摘要
多天线系统是5G的核心技术。无论是基站侧还是终端侧,多天线系统已经成为不可逆转的技术趋势。由于实际应用场景的限制,多天线系统的物理口径受到限制,天线单元之间的物理距离被压缩,使天线之间产生较强的电磁耦合和干扰,进而造成整个阵列的有源驻波、效率、辐射方向图等重要性能的损失,最终导致系统性能,例如数据吞吐率的损失。文章介绍了多天线系统中的电磁干扰特性以及目前一系列的解决方案,并展望了未来多天线系统的发展方向及其对电磁干扰特性、电磁耦合特性调控技术的影响。
Multiple antenna system(MAS)is the enabling technology of 5G communication.Whether for the base station or the mobile terminal,MAS has become an irreversible technology trend.The increase of the number of antennas also brings us new challenges.Due to the limitation of practical application scenarios,the physical aperture of MAS can not be increased unlimitedly.Due to the physical aperture of the MAS is constrained,the physical distance between the antenna elements will be close,which will inevitably cause strong electromagnetic coupling and interference between the antennas,infecting the active standing wave ratio,total efficiency,radiation pattern and other important performance of the whole array,and eventually lead degradation of system-level performance,such as data throughput.The purpose of this paper is to discuss the EMI characteristics of MAS and a series of current solutions,and predict the future development of MAS and its impact on EMI characteristics and corresponding electromagnetic coupling characteristic control technology.
关键词
多天线系统
互耦
电磁干扰
去耦
multiple antenna system
mutual coupling
electromagnetic interference
decoupling
