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Compact wideband MIMO mobile-antenna system design using mode-based decoupling techniques

Title
Compact wideband MIMO mobile-antenna system design using mode-based decoupling techniques
Author
김형동
Keywords
ground-mode tuning; metal rim; MIMO; mobile antennas; mode-based decouplers
Issue Date
2019-08
Publisher
WILEY
Citation
INTERNATIONAL JOURNAL OF RF AND MICROWAVE COMPUTER-AIDED ENGINEERING, v. 29, no. 8, article no. e21765
Abstract
This work focuses on designing small mobile antennas and their multiple-input multiple-output (MIMO) applications. In this study, it was investigated that small mobile antennas can obtain high radiation performance only when a tight coupling with the ground plane is generated through ground-mode tuning (GMT) of the ground plane. Furthermore, a novel mode-based decoupling concept is presented for their MIMO applications, based on a four-port network and by considering the ground-mode effect. Consequently, the proposed mode-based decouplers can effectively sustain high radiation performance and improve the isolation while providing low correlation by generating diagonally directed radiation patterns. In the proposed MIMO system, both GMT structures and mode-based decouplers are implemented utilizing the metal rims around the ground plane, thereby occupying very compact clearance, and the measured MIMO antennas fully covered 0.69 to 1 GHz band with high isolation up to 20 dB and low envelope correlation coefficient (ECC) value below 0.5, sufficiently applicable in mobile devices.
URI
https://onlinelibrary.wiley.com/doi/full/10.1002/mmce.21765https://repository.hanyang.ac.kr/handle/20.500.11754/153562
ISSN
1096-4290; 1099-047X
DOI
10.1002/mmce.21765
Appears in Collections:
COLLEGE OF ENGINEERING[S](공과대학) > ELECTRONIC ENGINEERING(융합전자공학부) > Articles
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