Four‐port MIMO Vivaldi antenna for access points

In this article, a 4‐port multiple input, multiple output (MIMO) antenna array is presented, based on a Vivaldi design for nonplanar applications like access points above 6 GHz. The antenna is configured with four Vivaldi antennas arranged orthogonally, one to each other, to increase the electromagn...

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Bibliographic Details
Published in:Microwave and optical technology letters 2024-01, Vol.66 (1), p.n/a
Main Authors: Lilian, Redonda‐Cuadra, José, Tirado‐Mendez, Hildeberto, Jardón‐Aguilar, Ruben, Flores‐Leal, Arturo, Rangel‐Merino, Jaime, Abarca Reyna, Alberto, Vasques‐Toledo Luis
Format: Article
Language:English
Subjects:
Antenna arrays
Antennas
Bandwidths
Correlation coefficients
hotspot
MIMO
MIMO communication
Reflectance
TARC
UWB
Vivaldi antenna
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Summary:In this article, a 4‐port multiple input, multiple output (MIMO) antenna array is presented, based on a Vivaldi design for nonplanar applications like access points above 6 GHz. The antenna is configured with four Vivaldi antennas arranged orthogonally, one to each other, to increase the electromagnetic isolation among elements. The Vivaldi element is fed with a microstrip with an integrated balun in only one arm, and each arm is set in an antipodal position to the other, giving an easy‐to‐design and build prototype, with no complicated feeding techniques. Each antenna plane has dimensions of 90 × 40 mm2. The array presents a bandwidth from 5.3 GHz to beyond 20 GHz, with electromagnetic isolation above 20 dB, an envelope correlation coefficient below 0.001 for the entire bandwidth, giving a diversity gain around 20 dB, and a total active reflection coefficient below −10 dB from 7 to 20 dB, fulfilling the metrics for MIMO applications.
ISSN:0895-2477
1098-2760
DOI:10.1002/mop.34018