Thumbnail Image
Publication

Mutual-coupling isolation using embedded metamaterial EM bandgap decoupling slab for densely packed array antennas

Alibakhshikenari, M.
; 
Khalily, M.
; 
Virdee, B.S.
; 
See, C.H.
; ; 
Limiti, E.
Publication Date
2019-04
End of Embargo
Supervisor
Keywords
Metamaterial, Electromagnetic bandgap, Array antennas, Decoupling slab, Mutual coupling, Synthetic aperture radar, Mulitiple-input multiple-output
Rights
© 2019 The Authors. Reproduced in accordance with the publisher's self-archiving policy under a Creative Commons License (https://creativecommons.org/licenses/by/4.0/)
Peer-Reviewed
Yes
Open Access status
Accepted for publication
2019-03-26
Institution
Department
Awarded
Embargo end date
Collections
Engineering and Digital Technology Publications
Show all metadata
Files
Thumbnail Image
Abd-Alhameed_IEEE_Access_2019.pdf
Adobe PDF, 16.07 MB
To keep suppressed
Adobe PDF, 2.07 MB
Additional title
Abstract
This article presents a unique technique to enhance isolation between transmit/receive radiating elements in densely packed array antenna by embedding a metamaterial (MTM) electromagnetic bandgap (EMBG) structure in the space between the radiating elements to suppress surface currents that would otherwise contribute towards mutual coupling between the array elements. The proposed MTM-EMBG structure is a cross-shaped microstrip transmission line on which are imprinted two outward facing E-shaped slits. Unlike other MTM structures there is no short-circuit grounding using via-holes. With this approach, the maximum measured mutual coupling achieved is -60 dB @ 9.18 GHz between the transmit patches (#1 & #2) and receive patches (#3 & #4) in a four-element array antenna. Across the antenna’s measured operating frequency range of 9.12 to 9.96 GHz, the minimum measured isolation between each element of the array is 34.2 dB @ 9.48 GHz, and there is no degradation in radiation patterns. The average measured isolation over this frequency range is 47 dB. The results presented confirm the proposed technique is suitable in applications such as synthetic aperture radar (SAR) and multiple-input multiple-output (MIMO) systems.
URI
http://hdl.handle.net/10454/18128
Version
Published version
Citation
Alibakhshsikenari M, Khalily M, Virdee BS et al (2019) Mutual-coupling isolation using embedded metamaterial EM bandgap decoupling slab for densely packed array antennas. IEEE Access. 7: 51827-51840.
Link to publisher’s version
Link to published version
Link to Version of Record
https://doi.org/10.1109/ACCESS.2019.2909950
Type
Article
Qualification name
Notes