Defected ground structure-based wideband circularly polarized 4-port MIMO antenna for future Wi-Fi 6E applications

A circularly-polarized (CP) wideband 4-port Multi-input multi-output (MIMO) antenna is proposed. The novel contribution of the proposed work lies in achieving CP through an L-shaped feedline and a carefully engineered orthogonally placed slotted ground plane geometry leading to a defected ground str...

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Bibliographic Details
Published inInternational journal of electronics and communications Vol. 170; p. 154815
Main Authors Yousef, Basma M., Ameen, Allam M., Desai, Arpan, Hsu, Heng-Tung, Dhasarathan, Vigneswaran, Ibrahim, Ahmed A.
Format Journal Article
LanguageEnglish
Published Elsevier GmbH 01.10.2023
Subjects
Antenna
Axial ratio
Circular polarization
DGS
MIMO diversity
Wi-Fi 6E
Wi-Fi 6E
DGS
MIMO diversity
Axial ratio
Circular polarization
Antenna
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ISSN1434-8411
DOI10.1016/j.aeue.2023.154815

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Summary:A circularly-polarized (CP) wideband 4-port Multi-input multi-output (MIMO) antenna is proposed. The novel contribution of the proposed work lies in achieving CP through an L-shaped feedline and a carefully engineered orthogonally placed slotted ground plane geometry leading to a defected ground structure (DGS). A single-fed CP antenna structure is then converted to the 4-port MIMO antenna that achieves higher isolation due to polarization diversity. The MIMO antenna demonstrated an impedance bandwidth (IBW) spanning 65.01 % (from 3.81 GHz to 7.48 GHz), along with an axial ratio bandwidth (ARBW) of 20.10 % (from 5.47 GHz to 6.70 GHz). The 4-port CP MIMO antenna shows decent MIMO diversity performance. The measured results of the fabricated structure displayed good agreement with the simulated results. Antenna having both MIMO capability and circular polarization helps in reducing the multipath fading effect while increasing the latency. Thus, the proposed antenna having a wide overlapping Axial Ratio (AR) and Impedance Bandwidth (IBW) can be a very good choice for future devices using the Wireless Fidelity (Wi-Fi) 6E band.
ISSN:1434-8411
DOI:10.1016/j.aeue.2023.154815