一种用于5G移动通信的毫米波大规模天线系统

A Millimeter-Wave Massive MIMO Antenna System for 5G Mobile Communication

毫米波大规模天线是目前5G研究中的热点技术之一,毫米波大规模天线可提供高增益波束和大带宽,能有效提升系统能量效率和容量。面向未来5G移动通信需求,提出一种基于数字-模拟混合波束形成架构的毫米波大规模天线设计方案。采取该方案,天线内部各单机功能界限清晰、接口明确,可极大提升天线系统的可测试性和可批量生产性。基于该设计方案研制了一款毫米波大规模天线样机,工作频率为28.6 GHz,带宽为1 GHz,天线共包括64个辐射单元,划分为4个子阵,每个子阵对应一个单独的数字收发通道。采取近场、OTA(Over The Air)的测试方法,完成了该样机的波瓣、等效辐射功率(EIRP)、矢量误差幅度(EVM)等指标的测试。该样机的研制及性能试验方法,均对未来毫米波大规模天线在5G移动通信系统中的广泛应用、大规模量产提供了很好的借鉴意义。

Millimeter-wave massive MIMO is one of the hot techniques in the fifth generation(5G)mobile communication system.The millimeter-wave massive MIMO antenna provides high-directional beam to compensate the transmission loss of the millimeter-wave signal through beamforming and effectively improve the system capacity and energy efficiency.According to the need of 5G mobile communication system,a millimeter-wave hybrid beamforming massive MIMO antenna architecture is designed in this paper.Using this architecture,an antenna prototype is developed.The bandwidth of this prototype is 1 GHz at 28.6 GHz.This prototype antenna contains 64 antenna elements,divided into four sub-arrays and each subarray corresponding one transmit/receive channel.Using near-field and OTA(Over The Air),the beam、EIRP and EVM of this antenna is measure that.We believe that this antenna prototype provide valuable insights and understanding for millimeter massive MIMO in 5G.