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Mutual Coupling Suppression Between Two Closely Placed Patch Antennas Using Higher-Order Modes

Qian, Jian-Feng, Gao, Steven, Sanz-Izquierdo, Benito, Wang, Hanyang, Zhou, Hai, Xu, Huiliang (2023) Mutual Coupling Suppression Between Two Closely Placed Patch Antennas Using Higher-Order Modes. IEEE Transactions on Antennas and Propagation, 71 (6). pp. 4686-4694. ISSN 0018-926X. (doi:10.1109/TAP.2023.3264874) (KAR id:102693)

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this article presents a novel method for decoupling two patch antennas. Instead of using the TM 10 mode of a conventional patch, TM 20 mode is utilized as the operation mode of the antenna. By loading stubs at the radiating edge of the patch, the resonance frequency of the TM 20 mode is moved down to the same band as the original TM 10 mode. Then, the mutual coupling between two such patch antennas is suppressed simply by physical placement, even when they are placed extremely close to each other. Without using any extra decoupling elements, isolation is improved by up to 20 dB using this method. Furthermore, this method can also be applied to multielement multi-input -multi-output (MIMO) array and dual-antenna system with different operating bands. The proposed method is verified with three different application scenarios, including a two-element MIMO array, a two-antenna system with adjacent operating bands, and a four-element MIMO array. Reasonable agreements between simulated and measured results can be observed, showing the advantages of simple structure, low cost, high isolation, and good radiation performance.

Item Type: Article
DOI/Identification number: 10.1109/TAP.2023.3264874
Additional information: For the purpose of open access, the author has applied a CC BY public copyright licence to any Author Accepted Manuscript version arising from this submission.
Uncontrolled keywords: Adjacent band, in-band, multi-input-multioutput (MIMO), mutual coupling, patch antenna
Subjects: T Technology > TK Electrical engineering. Electronics. Nuclear engineering > TK5101 Telecommunications
Divisions: Divisions > Division of Computing, Engineering and Mathematical Sciences > School of Engineering and Digital Arts
Funders: Engineering and Physical Sciences Research Council (
Depositing User: Benito Sanz Izquierdo
Date Deposited: 05 Sep 2023 15:32 UTC
Last Modified: 27 Feb 2024 11:04 UTC
Resource URI: (The current URI for this page, for reference purposes)

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