应用于移动终端的低耦合MIMO天线设计

Design of the Low Coupling MIMO Antenna Applied to Mobile Terminal

本文选用PIFA天线作为天线单元,利用缺陷地结构设计了一款单频低耦合两单元MIMO天线,这款天线可以应用于手机等小型移动终端中。PIFA是小型终端设备中经常采用的天线形式,它具有低剖面、小尺寸、易于制造和低成本等诸多优点。在强耦合MIMO天线的基础上,通过在两PIFA间的公共地板上开槽形成了具有阻带作用的缺陷地结构,达到了抑制地板电流和提高端口隔离度的目的,仿真结果表明设计的单频低耦合PIFA阵列能够很好的满足MIMO天线的设计要求。

This paper selects PIFA antenna as the antenna element and uses Defected Ground Structure to design a single frequency low coupling two unit MIMO antenna, which can be applied to small mobile terminals like cell phone. PIFA is the antenna form often used in small terminal equipment, which has advantages including low profile, small size, easy to manufacture and low cost. Based on tight coupling MIMO antenna, the defected ground structure is formed by slotting on the public floor between the two PIFA, achieving the goal of restraining floor current and improving port isolation. The simulation result shows that the single frequency low coupling PIFA array can well meet the design requirements of MIMO antenna.