A broadband technique for a decoupling network in a compact antenna array in a MIMO system

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Decoupling networks (DNs) have frequently been used to obtain high isolation performance between coupled antennas in multiple-input multiple-output (MIMO) systems due to their advantage of spatial efficiency, which is particularly important for mobile devices. However, conventional DNs suffer from narrowband limitations. In this paper, a broadband decoupling technique is proposed that broadens the isolation bandwidth using a parallel resonant point. A 1.95 GHz MIMO antenna system with 460 MHz of bandwidth (fractional bandwidth, FBW = 23.6%) is designed and measured using the scattering parameters. The isolation is found to be better than -15 dB, while the reflection coefficient is better than -6 dB. Furthermore, the antenna efficiency and envelope correlation coefficient (ECC) are evaluated in a reverberation chamber.
Publisher
EMW Publishing
Issue Date
2014-06
Language
English
Citation

Progress In Electromagnetics Research C, v.52, pp.27 - 38

ISSN
1937-8718
DOI
10.2528/PIERC14042901
URI
http://hdl.handle.net/10203/198856
Appears in Collection
EE-Journal Papers(저널논문)
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