Surface wave reduction in antenna arrays using metasurface inclusion for MIMO and SAR systems
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Publication date
2019-11Keyword
Metasurface isolatorMIMO
Synthetic-aperture radar
Meander line slot (MLS)
Mutual coupling
Antenna array
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©2019. American Geophysical Union. All Rights Reserved. Reproduced in accordance with the publisher's self-archiving policy.Peer-Reviewed
Yes
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Show full item recordAbstract
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 manuscriptCitation
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 Version of Record
https://doi.org/10.1029/2019RS006871Type
Articleae974a485f413a2113503eed53cd6c53
https://doi.org/10.1029/2019RS006871