一种新型宽频多通道（MIMO）天线设计

通过创新性采用两个天线共用一个辐射体的方法,设计了一款双频双极化两通道天线.垂直极化天线采用锥形天线原理,水平极化天线采用半波对称振子原理.通过在宽频锥形辐射体圆形筒上开缝隙的方式,设计得到3个水平极化半波对称振子.仿真结果表明,该天线带宽特性好、单元间隔离度高.垂直极化天线在端口回波损耗小于-10dB的情况下工作带宽为67％.和前人设计的该类型天线相比,本设计弥补了宽频天线仅有一个极化的缺点,垂直极化单元拥有更宽的工作带宽,且两个天线单元的极化方式正交,实现形式简单,结构可靠,成本低廉,有很好的运用前景.另外,通过适当结构参数的调节,也可以使天线工作在其他所需要的频段.

Design of a New Wideband MIMO Antenna

A dual-frequent dual-polarization with dual channel antenna was designed by using the method of two antennas shared one radiator. Using the principle of conical antenna, the V polarization antenna was designed. And the H polarization antenna was designed by using the principle of half wave dipole. Three half wave dipoles were obtained by cutting gaps on broadband conical radiator. Analyzing the simulation, the result is very well both in broad bandwidth and isolation. The bandwidth of V polarization antenna working at reflection coefficient less than -10dB is 67%. Comparing to former works, it is better at frequency bandwidth and it have two polarizations.Besides,the compact structure, reliable performance and low cost make it useful. In addition, it can work at another frequency band by tuning its structure parameters if necessary.