一种用于MIMO系统的三频段天线阵设计

摘要/Abstract

摘要：

介绍一种用于MIMO系统无线移动终端的小型化天线阵。单个天线采用平面倒F天线(PIFAs),地板尺寸为100 mm×60 mm,天线工作频率:885~915 MHz,1 760~1 870 MHz和2 450~2 510 MHz。为了使天线阵的体积变小,天线之间的距离远小于半波长,这就带来了另外的问题:天线之间的耦合较大。为了减小两天线的耦合,提出了两种办法。一种是使用悬空的,和两个天线相连的连接带。另外一种是使用FR4材料以及小地板。仿真结果显示,在工作频带内可获得15 dB 的隔离度而不明显影响辐射特性。

关键词: 三频, MIMO, 去耦

Abstract:

A low-profile antenna array for multiple-input-multiple-output (MIMO)-enabled wireless communication terminals is introduced.The chosen planar inverted-F antennas (PIFAs) which are etched on a compact board with dimensions of 100×60 mm² are intended to operate at the following frequency bands: 885-915 MHz,1 760-1 870 MHz and 2 450-2 510 MHz.In order to obtain a very compact system,the distance between the PIFAs is severely reduced to less than a half wavelength (12 mm=0.036λwhen the antenna work at 0.9 G).This leads to another problem: the mutual coupling between PIFA antenna array elements is too high.To improve the isolation between the two closely packed antennas,two methods are proposed.One is to use a suspended neutralization strip which is inserted and physically connected to the antenna elements to improve isolation.The other is to use FR4 and simple round plane modification to reduce coupling.The simulation results show that a 15 dB mutual coupling is obtained over the operating bandwidth without affecting the radiation patterns obviously.

Key words: tri-band;MIMO;recouping

中图分类号:

TN957.2

胡国庆, 刘英, 龚书喜, 张卫东, 张宁. 一种用于MIMO系统的三频段天线阵设计[J]. , 2011, 24(3): 76-.

HU Guo-Qing, LIU Ying, GONG Shu-Xi, ZHANG Wei-Dong, ZHANG Ning. Design of a Tri-Band Antenna Array for the MIMO System[J]. , 2011, 24(3): 76-.

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