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Mutual-Coupling Isolation Using Embedded Metamaterial EM Bandgap Decoupling Slab for Densely Packed Array Antennas

Alibakhshikenari, Mohammad, Khalily, Mohsen, Virdee, Bal Singh, See, Chan Hwang, Abd-Alhameed, Raed A. and Limiti, Ernesto (2019) Mutual-Coupling Isolation Using Embedded Metamaterial EM Bandgap Decoupling Slab for Densely Packed Array Antennas IEEE Access, 7. pp. 51827-51840.

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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.

Item Type: Article
Divisions : Faculty of Engineering and Physical Sciences > Electronic Engineering
Authors :
NameEmailORCID
Alibakhshikenari, Mohammad
Khalily, Mohsenm.khalily@surrey.ac.uk
Virdee, Bal Singh
See, Chan Hwang
Abd-Alhameed, Raed A.
Limiti, Ernesto
Date : 9 April 2019
Funders : Engineering and Physical Sciences Research Council (EPSRC)
DOI : 10.1109/ACCESS.2019.2909950
Copyright Disclaimer : © 2019 IEEE. Personal use of this material is permitted. Permission from IEEE must be obtained for all other uses, in any current or future media, including reprinting/republishing this material for advertising or promotional purposes, creating new collective works, for resale or redistribution to servers or lists, or reuse of any copyrighted component of this work in other works.
Uncontrolled Keywords : Metamaterial; Electromagnetic bandgap; Array antennas; Decoupling slab; Mutual coupling; Synthetic aperture radar; Multiple-input multiple-output
Depositing User : Diane Maxfield
Date Deposited : 02 May 2019 14:12
Last Modified : 28 May 2019 15:07
URI: http://epubs.surrey.ac.uk/id/eprint/851734

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