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Decoupler Design for MIMO Antennas of USB Dongle Applications Using Ground Mode Coupling Analysisopen access

Authors
Zahid, ZeeshanQu, LongyueKim, Hyung HoonKim, Hyeong dong
Issue Date
2018
Publisher
ELECTROMAGNETICS ACAD
Citation
PROGRESS IN ELECTROMAGNETICS RESEARCH M, v.76, pp.113 - 122
Indexed
SCOPUS
Journal Title
PROGRESS IN ELECTROMAGNETICS RESEARCH M
Volume
76
Start Page
113
End Page
122
URI
https://scholarworks.bwise.kr/hanyang/handle/2021.sw.hanyang/3418
DOI
10.2528/PIERM18092604
ISSN
1937-8726
Abstract
In this paper, the impact of decoupler type has been analyzed on the performance of planar inverted-F antenna (PIFA)-based multiple-input multiple-output (MIMO) antenna. A T-type and a loop-type decoupler have been employed for the isolation of the MIMO antennas, and the performances of the two cases have been compared. The decouplers have been selected based on their different coupling mechanisms with the dominant ground mode. The antennas have been designed for the ground configuration of a USB dongle operating at 2.45 GHz band. Characteristic mode analysis of the ground plane has been carried out, and the MIMO systems have been analysed based on the coupling among the antenna, decoupler and the dominant characteristic mode of the ground plane. It has been observed that the coupling between the decoupler and the ground mode significantly affects the radiation efficiency as well as the diversity performance of the MIMO antenna.
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