Loading...
Surface wave reduction in antenna arrays using metasurface inclusion for MIMO and SAR systems
Alibakhshikenari, M. Virdee, B.S. See, C.H. Falcone, F. Limiti, E.
Alibakhshikenari, M.
Virdee, B.S.
See, C.H.
Falcone, F.
Limiti, E.
Publication Date
2019-11
End of Embargo
Supervisor
Rights
©2019. American Geophysical Union. All Rights Reserved. Reproduced in accordance with the publisher's self-archiving policy.
Peer-Reviewed
Yes
Open Access status
Accepted for publication
2019-10-02
Institution
Department
Awarded
Embargo end date
Additional title
Abstract
An effective method is presented for suppressing mutual coupling between adjacent radiating elements which is based on metasurface isolation for MIMO and synthetic aperture radar (SAR) systems. This is achieved by choking surface current waves induced over the patch antenna by inserting a cross-shaped metasurface structure between the radiating elements. Each arm of the cross-shaped structure constituting the metasurface is etched with meander-line slot (MLS). Effectiveness of the metasurface is demonstrated for a2×2antenna array that operates over six frequency sub-bands in X, Ku and K-bands. With the proposed technique, the maximum improvement achieved in attenuating mutual coupling between neighbouring antennas is: 8.5 dB (8-8.4 GHz), 28 dB (9.6-10.8 GHz), 27 dB (11.7-12.6 GHz), 7.5 dB (13.4-14.2 GHz), 13 dB (16.5-16.8 GHz) and 22.5 dB (18.5-20.3 GHz). Furthermore, with the proposed technique (i) minimum center-to-center separation between the radiating elements can be reduced to 0.26λ0, where λ0 is 8.0 GHz; (ii) use of ground-plane or defected ground structures are unnecessary; (iii) use of short-circuited via-holes are avoided; (iv) it eliminates the issue with poor front-to-back ratio; and (v) it can be applied to existing arrays retrospectively.
Version
Accepted manuscript
Citation
Alibakhshikenari M, Virdee BS, See CH et al (2019) Surface wave reduction in antenna arrays using metasurface inclusion in MIMO and SAR systems. Radio Science. 54(11): 1067-1075.
Link to publisher’s version
Link to published version
Link to Version of Record
Type
Article