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Multimode Decoupling Technique with Independent Tuning Characteristic for Mobile Terminals

Xu, Hang, Zhou, Hai, Gao, Steven, Wang, Hanyang, Cheng, Yujian (2017) Multimode Decoupling Technique with Independent Tuning Characteristic for Mobile Terminals. IEEE Transactions on Antennas and Propagation, 65 (12). pp. 6739-6751. ISSN 0018-926X. E-ISSN 1558-2221. (doi:10.1109/TAP.2017.2754445) (KAR id:63519)

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Abstract

The isolation between antenna elements is a key metric in some promising 5G technologies such as beamforming and in-band full-duplex (IBFD). However, multimode decoupling technology remains a great challenge especially for mobile terminals. One difficulty in achieving multi decoupling modes is that the operating modes of closely-packed decoupling elements have very strong mutual effect, which makes the tuning complicated and even unfeasible. Thus, in physical principle, a novel idea of achieving the stability of the boundary conditions of decoupling elements is proposed to solve the mutual effect problem; in physical structure, a metal boundary is adopted to realize the stability. One distinguished feature of the proposed technique is that the independent tuning characteristic can be maintained even if the number of decoupling elements increases. Therefore, wideband/multiband high isolation can be achieved by using multi decoupling elements. To validate the concept, two case studies are given. In a quad-mode decoupling design, the isolation is enhanced from 12.7 dB to > 21 dB within 22.0% bandwidth by using a 0.295?0 × 0.059?0 × 0.007?0 decoupling structure. The mechanism of decoupling technique and the mutual effect between decoupling elements are investigated.

Item Type: Article
DOI/Identification number: 10.1109/TAP.2017.2754445
Uncontrolled keywords: Multimode decoupling elements, wideband decoupling, mutual coupling, 5G communication
Divisions: Divisions > Division of Computing, Engineering and Mathematical Sciences > School of Engineering and Digital Arts
Depositing User: Steven Gao
Date Deposited: 21 Sep 2017 15:08 UTC
Last Modified: 16 Feb 2021 13:48 UTC
Resource URI: https://kar.kent.ac.uk/id/eprint/63519 (The current URI for this page, for reference purposes)
Gao, Steven: https://orcid.org/0000-0002-7402-9223
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