重庆邮电大学学报（自然科学版）2017，Vol.29Issue(2)：176-181,6.DOI:10.3979/j.issn.1673-825X.2017.02.006
一种基于缺陷地结构的双单元MIMO天线阵宽带解耦方法
A dual-antenna MIMO array wideband decoupling method using defected ground structure
摘要
Abstract
In this paper,a wideband decoupling method of the dual-antenna MIMO array is studied for mobile terminals based on decoupling mechanism of defected ground structure.The method is to etch three pairs open-ended slots of various lengths on a T-shaped metal ground to form a pair of L-shaped monopole branches and two pairs of I-shaped monopole branches.These branches are designed to suppress the mutual coupling between antenna elements at different bands,which forms a wideband decoupling.Measured results show that,with-6 dB reflection coefficient as a standard,the operating bandwidths are 75 MHz(685 MHz~760 MHz),50 MHz(910 MHz~960 MHz),880 MHz(1.65 GHz~2.53 GHz),respectively.The measured mutual coupling between antenna elements is less than-15 dB at all frequency ranges,which meets the requirements of the GSM900,LTE700,GSM1800,GSM1900,UMTS,LTE2300,LTE2500,2.4 GHz WLAN bands.Furthermore,it is also a good practical application in the market where 2G,3G and 4G mobile communication system co-existed.Finally,the antenna gain is varied from 0.51 dBi to 2.45 dBi,and the efficiency is above 60% at working bands,which shows that MIMO array has a well radiation performance.关键词
宽带解耦/开口槽线/L/I型单极/移动终端/多输入多输出(MIMO)Key words
wideband decoupling/open-ended slot/L/I-shaped monopole/mobile terminals/multiple input multiple output(MIMO)分类
信息技术与安全科学引用本文复制引用
蔡志强,王平..一种基于缺陷地结构的双单元MIMO天线阵宽带解耦方法[J].重庆邮电大学学报（自然科学版）,2017,29(2):176-181,6.基金项目
港澳台科技合作专项(2015DFT10170) （2015DFT10170）
长江学者和创新团队发展计划(IRT1299) （IRT1299）
重庆邮电大学博士启动基金(A2015-08) （A2015-08）
The Hong Kong,Macao and Taiwan Science and Technology Cooperation Projects(2015DFT10170) （2015DFT10170）
The Program for Changjiang Scholars and Innovative Research Team in University(IRT1299) （IRT1299）
The Doctoral Fund of Chongqing University of Posts and Telecommunications(A2015-08) （A2015-08）
