Research And Design Of Dual-polarized Massive MIMO Antenna Arrays For 5G

Wireless coverage of mobile communication networks depends on antennas.In order to meet the low-latency,high-rate,and large-capacity application requirements of the Internet of Everything and its various wireless vertical services,5G(fifth generation mobile communication system)needs to use Massive MIMO(large-scale multi-input multi-output)antenna arrays.Based on this application background,in this paper,the application of research and design of Sub-6GHz band large-scale antenna arrays for mobile communication are carried out.First of all,in this paper,the research progress of Massive MIMO technology is summarized,and many examples of 5G millimeter-wave antenna and Sub-6GHz Massive MIMO antenna are listed to introduce the development of 5G antenna technology.Then,the basic principles and key technologies of the antenna arrays are summarized and analyzed,which lay a theoretical foundation for the next research and design.Based on this,combined with the 5G working frequency band issued by the Ministry of Industry and Information Technology of China,the research and design work of dual-polarization large-scale antenna arrays has been carried out.The details are as follows:1.A wideband,dual-polarized PCB printed antenna is proposed.The antenna feeded by PCB balun which printed with ?-shaped microstrip line,that can achieve good impedance and isolation performance in the band of 2.1GHz-3.6GHz,and have stable pattern characteristics.Based on this,a design scheme of a 64T/R dual-polarization large-scale antenna arrays are proposed.The large-scale antenna arrays work at 2.515GHz-2.675 GHz,using PCB printed antenna as radiation element for array design.Then according to the array form,the element spacing is determined and a design method of three-element subarray feed network is proposed.And through simulation and comparison analysis,a form of boundary condition implementation that effectively improves the isolation of subarrays is proposed.Finally,physical tests were performed on dual-polarized large-scale PCB printed antennas,and the measured results of antenna agree with the simulation results,meeting the design requirements.2.A low-profile metal patch antenna working at 3.4GHz-3.6GHz is proposed.The antenna adopts a very simple air microstrip patch structure,which patch and the feeding columns are integrated.The antenna can be produced on a large scale by a metal die-casting process,which is simple to manufacture,and has low cost.Then,a design scheme of a 64T/R dual-polarization large-scale antenna arrays are proposed.The large-scale antenna arrays workat 3.4GHz-3.6GHz,using metal patch antenna as radiation element for array design.And according to the array form,the optimized design of the sub-array feed network and array boundary conditions are completed.Finally,physical tests have been carried out on dual-polarized large-scale metal patch antennas,and the measured results of antenna agree with the simulation results.The two antennas designed above have met the system requirements of the 5G network,and the corresponding mass products have been put into practical use.