Enhanced Isolation of a Closely Spaced Four-Element MIMO Antenna System Using Metamaterial Mushroom

Enhanced Isolation of a Closely Spaced Four-Element MIMO Antenna System Using Metamaterial Mushroom
Title:
Enhanced Isolation of a Closely Spaced Four-Element MIMO Antenna System Using Metamaterial Mushroom
Other Titles:
IEEE Transactions on Antennas and Propagation
Keywords:
Publication Date:
18 May 2015
Citation:
G. Zhai, Z. N. Chen and X. Qing, "Enhanced Isolation of a Closely Spaced Four-Element MIMO Antenna System Using Metamaterial Mushroom," in IEEE Transactions on Antennas and Propagation, vol. 63, no. 8, pp. 3362-3370, Aug. 2015. doi: 10.1109/TAP.2015.2434403
Abstract:
A double-layer mushroom structure is proposed to enhance the interelement isolation of a four-element antenna system, wherein four closely positioned substrate-integrated cavity-backed slot (SICBS) antenna elements are configured for multiple-input multiple-output (MIMO) applications. A wall with a double-layer mushroom structure is positioned in between the four antenna elements. An antenna prototype with a ground plane size of 0.96 λo × 0.96 λo (λo is the free space-wavelength at 2.4 GHz) demonstrates an enhanced interelement isolation of 16 dB for parallel-directed antenna element pairs, while the isolation of the orthogonally directed antenna element pairs remains unchanged over the operating bandwidth (|S11| <; -10 dB) of 2.396 -2.45 GHz. With the enhanced isolation larger than 42 dB between each antenna element pair, the envelope correlation coefficient (ECC) is lower than 0.02 across the operating bandwidth. The simulated and measured results validate the good MIMO diversity performance of the proposed antenna system.
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PublisherCopyrights
Funding Info:
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ISSN:
0018-926X
1558-2221
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