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8-Port Semi-Circular Arc MIMO Antenna with an Inverted L-Strip Loaded Connected Ground for UWB Applications

Addepalli, T.
; 
Desai, A.
; 
Elfergani, Issa T.
; 
Anveshkumar, N.
; 
Kulkarni, J.
; 
Zebiri, C.
; 
Rodriguez, J.
; 
Publication Date
2021-06, 2021-06
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Keywords
Multiple-input multiple-output (MIMO) antennas, 4-elements, 8-elements, Ultra-wide broadband (UWB), Envelope correlation coefficient (ECC), Isolation
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© 2021 The Authors. Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (https://creativecommons.org/licenses/by/4.0/).
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yes
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Gold
Accepted for publication
2021-06-17
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Engineering and Digital Technology Publications
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Abstract
Multiple-input multiple-output (MIMO) antennas with four and eight elements having connected grounds are designed for ultra-wideband applications. Careful optimization of the lines connecting the grounds leads to reduced mutual coupling amongst the radiating patches. The proposed antenna has a modified substrate geometry and comprises a circular arc-shaped conductive element on the top with the modified ground plane geometry. Polarization diversity and isolation are achieved by replicating the elements orthogonally forming a plus shape antenna structure. The modified ground plane consists of an inverted L strip and semi ellipse slot over the partial ground that helps the antenna in achieving effective wide bandwidth spanning from (117.91%) 2.84–11 GHz. Both 4/8-port antenna achieves a size of 0.61 λ × 0.61 λ mm2 (lowest frequency) where 4-port antenna is printed on FR4 substrate. The 4-port UWB MIMO antenna attains wide impedance bandwidth, Omni-directional pattern, isolation >15 dB, ECC 4.5 dB making the MIMO antenna suitable for portable UWB applications. Four element antenna structure is further extended to 8-element configuration with the connected ground where the decent value of IBW, isolation, and ECC is achieved.
URI
http://hdl.handle.net/10454/18536
 http://hdl.handle.net/10454/18536
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Published version
Citation
Addepalli T, Desai A, Elfergani IT, Anveshkumar N, Kulkarni J, Zebiri C, Rodriguez J and Abd-Alhameed RA (2021) 8-Port Semi-Circular Arc MIMO Antenna with an Inverted L-Strip Loaded Connected Ground for UWB Applications. Journal of Electronics. 10(12): 1476.
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https://doi.org/10.3390/ electronics10121476
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Article
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