Publication:
Interaction between closely packed array antenna elements using meta-surface for applications such as MIMO systems and synthetic aperture radars

Date

2018

Authors

Alibakhshikenari, Mohammad
Virdee, Bal S.
Shukla, Panchamkumar
See, Chan H.
Abd-Alhameed, Raed
Khalily, Mohsen
Limiti, Ernesto

Director

Publisher

Wiley
Acceso abierto / Sarbide irekia
Artículo / Artikulua
Versión publicada / Argitaratu den bertsioa

Project identifier

European Commission/Horizon 2020 Framework Programme/722424openaire

Abstract

The paper presents a technique to enhance the isolation between adjacent radiating elements that is common in densely packed antenna arrays. Such antennas provide frequency beam-scanning capability needed in multiple-input multiple-output (MIMO) systems and synthetic aperture radars. The method proposed here uses a metamaterial decoupling slab (MTM-DS), which is located between radiating elements, to suppress mutual coupling between the elements that would otherwise degrade the antenna efficiency and performance in both the transmit and receive mode. The proposed MTM-DS consists of mirror imaged E-shaped slits engraved on a microstrip patch with inductive stub. Measured results confirm over 9–11 GHz with no MTM-DS the average isolation (S12) is −27 dB; however, with MTM-DS the average isolation improves to −38 dB. With this technique the separation between the radiating element can be reduced to 0.66λ0, where λ0 is free space wavelength at 10 GHz. In addition, with this technique there is 15% improvement in operating bandwidth. At frequencies of high impedance match of 9.95 and 10.63 GHz the gain is 4.52 and 5.40 dBi, respectively. Furthermore, the technique eliminates poor front-to-back ratio encountered in other decoupling methods. MTM-DS is also relatively simple to implement. Assuming adequate space is available between adjacent radiators the MTM-DS can be fixed retrospectively on existing antenna arrays, which makes the proposed method versatile. ©2018. American Geophysical Union. All Rights Reserved.

Description

Keywords

Antenna arrays, Frequency beam scanning, Metamaterial decoupling slab (MTM-DS), Multiple-input multiple-output (MIMO) systems, Synthetic aperture radars

Department

Ingeniería Eléctrica, Electrónica y de Comunicación / Ingeniaritza Elektrikoa, Elektronikoaren eta Telekomunikazio Ingeniaritzaren

Faculty/School

Degree

Doctorate program

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©2018. American Geophysical Union. All Rights Reserved.

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