Dual‐Band MIMO Dipole With Integrated Balun and Optimized Algorithm‐Based Decoupling Structure

This work presents a multiple‐input/multiple‐output (MIMO) antenna consisting of dipoles with integrated baluns and a parasitic element to reduce mutual coupling, which can cover two frequency bands. The configuration of the decoupling element is determined by using an optimization algorithm. The al...

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Bibliographic Details
Published in:International journal of RF and microwave computer-aided engineering Vol. 2025; no. 1
Main Authors: Hatamian, Amir, Nourinia, Javad, Ghobadi, Changiz
Format: Journal Article
Language:English
Published: Hoboken John Wiley & Sons, Inc 01.01.2025
Subjects:
Algorithms
Antennas
Decoupling
Design
Dipoles
Efficiency
Optimization algorithms
Optimization techniques
Radiation
ISSN:1096-4290, 1099-047X
Online Access:Get full text
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Summary:This work presents a multiple‐input/multiple‐output (MIMO) antenna consisting of dipoles with integrated baluns and a parasitic element to reduce mutual coupling, which can cover two frequency bands. The configuration of the decoupling element is determined by using an optimization algorithm. The algorithm takes nine physical dimensions of the decoupling element as input and adjusts them by minimizing a cost function. One of these decision variables (DVs) is the number of decoupling element’s stairs (steps), which is a discrete parameter. In its simple form, the antenna cannot obtain proper isolation in the low‐frequency band, which has been solved by employing a decoupling structure in the middle of the antenna. The experimental results show that the antenna has impedance bandwidths of 1.95–3.50 GHz and 3.98–5.67 GHz, providing minimum isolation of 13.1 and 19.5 dB in the low‐ and high‐frequency bands, respectively. The ECC value is lower than 0.0038, and the peak gains are equal to 4.4 and 5.21 dB for the low‐ and high‐frequency bands. The main contribution of this work is the design of the decoupling element, which, considering the antenna’s characteristics, has improved the antenna’s isolation by 12.4 dB only in the center of the low‐frequency band.
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ISSN:1096-4290
1099-047X
DOI:10.1155/mmce/6465774