基于改进型中和线的MIMO天线设计

摘要

提出了一款适用于移动终端的多入多出(MIMO)手机天线.该MIMO天线由两个中心对称的天线单元构成,采用耦合馈电方式,拓展了天线带宽,保证了天线的小型化.通过地板中间引入T型枝节,天线单元之间用中和线进行连接,达到提高天线单元间隔离度的目的.仿真结果表明,该天线能够覆盖824 MHz～960 MHz和2 300 MHz～2 600 MHz两个重要工作频段,中和线上加载的集总电感元件能有效减小中和线的物理长度.对天线进行了实物加工测试,实物测量结果与仿真结果比较吻合.%A Multiple Input Multiple Output(MIMO) mobile phone antenna suitable for mobile terminal is proposed in this paper.The proposed antenna is composed of two center-symmetrical antenna units.In order to expand the bandwidth of the antenna,these two units are fed by coupling mode,and it ensures the miniaturization of the antenna.To obtain a high isolation between the two antenna units,a T-shaped branch is designed on the middle of the ground,and the neutralization line is introduced used to connect two units.The simulation results show that the proposed antenna can cover two important operating frequency bands of 824 MHz～960 MHz and 2 300 MHz～2 600 MHz,and the physical length of the neutralization line is reduced effectively due to the lumped inductance.The proposed antenna was fabricated and tested,and the measurement results were consistent with the simulation results.