双频MIMO印刷偶极子天线设计

Design of dual-band MIMO printed dipole antenna

文章设计了一种具有双频工作特性的偶极子多入多出(Multiple Input Multiple Output, MIMO)天线,通过在接地板上开矩形缝隙并添加音叉型寄生微带枝节,达到了天线端口去耦合的目的,隔离度显著改善。偶极子天线单元由2个矩形开口环构成,2个环形谐振器的尺寸不同。天线实现了双频工作特性。在端口反射系数不高于-10 dB的情况下,该MIMO天线在1.63~2.01 GHz和5.61~7.02 GHz 2个频段内均实现了超过20 dB的隔离度。

A dual frequency(multiple input multiple output,MIMO)dipole antenna is designed in this article.A rectangular slot on the ground plane and fork-shaped parasitic microstrip branches are employed to improve the decoupling between antenna inputs,and the isolation is enhanced obviously.The proposed dipole consists of two microstrip split-ring,and realizes dual frequency characteristics because of the different sizes of the ring resonators.The proposed MIMO antenna demonstrates an isolation of much more 20 dB in both pass bands of 1.44~2.58 GHz and 4.97~6.15 GHz,while the port reflection coefficients both less than-10 dB.