应用于物联网MIMO天线的双频谐振解耦结构  

Double-Frequency Resonator Decoupling Structure Used in IOT MIMO Antenna

作　　者：黄晓艳[1] 文方 HUANG Xiaoyan;WEN Fang(School of Artifical Intelligence Chongqing Creation Vocational College,Yongchuan Chongqing 402160,China;1nstitute of AI and Electrical Engineering Guizhou Institute of Technology,Guiyang Guizhou 550001,China)

机构地区：[1]重庆科创职业学院人工智能学院,重庆永川402160 [2]贵州理工学院人工智能与电气学院,贵州贵阳550001

出　　处：《电子器件》2022年第1期79-84,共6页Chinese Journal of Electron Devices

基　　金：重庆市教育委员会科学技术研究项目(KJQN202105403)。

摘　　要：提出了一种用于双频MIMO天线的谐振器去耦结构。通过双频单极子MIMO天线对该解耦结构进行验证。双频单极子天线分别工作在低频2.4 GHz和高频5.8 GHz。双频解耦结构在低频段主要是采用两个反向的π型微带谐振器解耦,高频段主要是采用π型缝隙谐振器解耦。天线采用微带线馈电,解耦谐振器与天线地板印刷在PCB同一面,结构紧凑易于与系统集成,可以广泛应用于物联网通信系统中。实测结果:双频谐振器去耦结构实现隔离度高于25 dB,单极子天线阻抗带宽分别为2.0 GHz~3.0 GHz和5.0 GHz~6.0 GHz(S_(11)<-10 dB),低频段增益最大增益点1.5 dBi,高频段最大增益点3 dBi。A resonator decoupling structure for double-frequency MIMO antenna was proposed. The decoupling structure is verified on the dual-frequency monopole MIMO antenna. The dual-frequency monopole antenna operates in the low frequency of 2.4 GHz and high frequency of 5.8 GHz, respectively. Two inverted π type micro-strip resonators and one π type micro-strip gap resonator are used for decoupling between two antenna units in low and high frequency band, respectively. The proposed antenna is fed with micro-strip. The decoupling resonators and the antenna ground are printed on the same side of PCB. The compact structure is easy to be integrated with the system, and it can be widely used in the communication system of Internet of Things. Results of measurement show that, the decoupling structure of the dual-frequency resonator achieves a higher isolation than 25 dB,and the impedance bandwidth of the monopole antenna is 2.0 GHz~3.0 GHz and 5.0 GHz~6.0 GHz respectively(S_(11)<-10 dB),the maximum gain point of low frequency and the high frequency are 1.5 dBi and 3 dBi, respectively.

关 键 词：MIMO天线 单极子天线 高隔离度 双频 π型谐振器 

分 类 号：TN820[电子电信—信息与通信工程]