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Gain enhancement for MIMO antenna using metamaterial structure

Published online by Cambridge University Press:  15 May 2019

Nguyen Ngoc Lan Open the ORCID record for Nguyen Ngoc Lan [Opens in a new window]  and
Vu Van Yem
Nguyen Ngoc Lan*
Affiliation:
School of Electronics and Telecommunications, Hanoi University of Science and Technology, Hanoi, Vietnam
Vu Van Yem
Affiliation:
School of Electronics and Telecommunications, Hanoi University of Science and Technology, Hanoi, Vietnam
*
Author for correspondence: Nguyen Ngoc Lan, E-mail: nnlan@moet.edu.vn
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Abstract

In this paper, a multiple input multiple output antenna which operates at 5.8 GHz for wireless local area network applications is proposed. The proposed antenna is composed of two sets of four elements antenna array (2 × 2) on the top and a novel metamaterial structure on the ground plane. Here, the ground plane, which includes a lattice of 2 × 5 unit cells of metamaterial structure, is utilized in order to improve parameters of the antenna. Thanks to the proposed metamaterial structure, not only gain and bandwidth of antenna are enhanced, but also mutual coupling is reduced. The final design, with an overall size of 137 × 77 × 3.048 mm3, resulted in a |S11| <−10 dB bandwidth of 1.78 GHz and a peak gain of 9.2 dBi. In addition, the isolation is higher than 18 dB although the close separation from edge to edge of the two antennas is only 2 mm and radiation efficiency of 73% at the operating frequency band. All is simulated based on CST Studio software and the simulated S-parameter results of the antenna are in good agreement with measurement results.

Keywords

Array antennametamaterial antennaMIMO antennamutual coupling
Type
Research Papers
Information
International Journal of Microwave and Wireless Technologies , Volume 11 , Issue 8 , October 2019 , pp. 851 - 862
Copyright
Copyright © Cambridge University Press and the European Microwave Association 2019 

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