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Electronics 2018, 7(9), 198; https://doi.org/10.3390/electronics7090198

Antenna Mutual Coupling Suppression Over Wideband Using Embedded Periphery Slot for Antenna Arrays

1
Electronic Engineering Department, University of Rome Tor Vergata, Via del Politecnico 1, 00133 Rome, Italy
2
Centre for Communications Technology, School of Computing and Digital Media, London Metropolitan University, 166-220 Holloway Road, London N7 8DB, UK
3
School of Engineering, University of Bolton, Deane Road, Bolton BL3 5AB, UK
4
School of Electrical Engineering and Computer Science, University of Bradford, Richmond Rd, Bradford, West Yorkshire BD7 1DP, UK
5
5G innovation Centre (5GIC), Institute for Communication Systems (ICS), University of Surrey, Guildford GU2 7XH, UK
6
Electric and Electronic Engineering Department, Universidad Pública de Navarra, 31006 Navarra, Spain
*
Author to whom correspondence should be addressed.
Received: 20 August 2018 / Revised: 7 September 2018 / Accepted: 14 September 2018 / Published: 16 September 2018
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Abstract

This paper presents a new approach to suppress interference between neighbouring radiating elements resulting from surface wave currents. The proposed technique will enable the realization of low-profile implementation of highly dense antenna configuration necessary in SAR and MIMO communication systems. Unlike other conventional techniques of mutual coupling suppression where a decoupling slab is located between the radiating antennas the proposed technique is simpler and only requires embedding linear slots near the periphery of the patch. Attributes of this technique are (i) significant improvement in the maximum isolation between the adjacent antennas by 26.7 dB in X-band and >15 dB in Ku and K-bands; (ii) reduction in edge-to-edge gap between antennas to 10 mm (0.37 λ); and (iii) improvement in gain by >40% over certain angular directions, which varies between 4.5 dBi and 8.2 dBi. The proposed technique is simple to implement at low cost. View Full-Text
Keywords: Mutual coupling suppression; slotted array antennas; synthetic aperture radar (SAR); Multiple-Input Multiple-Output (MIMO) systems; decoupling method Mutual coupling suppression; slotted array antennas; synthetic aperture radar (SAR); Multiple-Input Multiple-Output (MIMO) systems; decoupling method
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This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited (CC BY 4.0).
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Alibakhshikenari, M.; Virdee, B.S.; Shukla, P.; See, C.H.; Abd-Alhameed, R.; Khalily, M.; Falcone, F.; Limiti, E. Antenna Mutual Coupling Suppression Over Wideband Using Embedded Periphery Slot for Antenna Arrays. Electronics 2018, 7, 198.

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