Wideband Aperture-Overlapped MIMO Antennas Naturally Integrating Mode Orthogonal and Parasitic Decoupling Schemes

In this letter, a wideband self-decoupling scheme is proposed for multiple-input-multiple-output (MIMO) antennas. Based on the mode orthogonal decoupling scheme, when the proposed differential mode antenna is integrated with a loop branch, it will be decoupled at one frequency f 1 . Moreover, the pa...

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Bibliographic Details
Published in:IEEE antennas and wireless propagation letters 2024-08, Vol.23 (8), p.2441-2445
Main Authors: Sui, Jiangwei, Huang, Cuixia, Li, Junru, Zhu, Xiangwei, Li, Du
Format: Article
Language:English
Subjects:
Antenna decoupling
Antennas
aperture-overlapped
Broadband antennas
Couplings
dipole mode
Filtering theory
MIMO communication
Mobile antennas
mobile terminals
multiple-input–multiple-output (MIMO)
mutual coupling
self-decoupled
Wideband
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Summary:In this letter, a wideband self-decoupling scheme is proposed for multiple-input-multiple-output (MIMO) antennas. Based on the mode orthogonal decoupling scheme, when the proposed differential mode antenna is integrated with a loop branch, it will be decoupled at one frequency f 1 . Moreover, the parasitic branch in the proposed antenna naturally works as a parasitic decoupling element, so it will achieve decoupling at a second frequency f 2 simultaneously. Two demonstrational examples working in the N79 band (4.4 GHz to 5 GHz) are studied. The results show that the MIMO antennas using the proposed scheme can achieve a wideband isolation greater than 26.4 dB across the whole band with two transmission zeros. Taking into consideration the attractive integration free from differential feeding structures and wideband high isolation, the proposed integrating decoupling scheme may provide a new vision for the MIMO antenna designs.
ISSN:1536-1225
1548-5757
DOI:10.1109/LAWP.2024.3395270