一种用于MIMO系统的三频段天线阵设计

Abstract

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

CLC Number:

TN957.2

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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Design of a Tri-Band Antenna Array for the MIMO System

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