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Mutual-coupling reduction in triple-band MIMO antennas for WLAN using CSRRs

Published online by Cambridge University Press:  19 March 2020

Vahid Najafy  and
Mohammad Bemani Open the ORCID record for Mohammad Bemani [Opens in a new window]
Vahid Najafy
Affiliation:
Department of Electrical and Computer Engineering, University of Tarbiat Modares, Tehran, Iran
Mohammad Bemani*
Affiliation:
Department of Electrical and Computer Engineering, University of Tabriz, Tabriz, Iran
*
Author for correspondence: Mohammad Bemani, E-mail: bemani@tabrizu.ac.ir
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Abstract

For the requirements of low mutual-coupling MIMO antennas for WLAN, a new complementary split-ring resonator (CSRR) unit cell is introduced in this paper. A microstrip-fed Vivaldi antenna array is designed for WLAN applications, where compact triple-band gap-complementary split-ring resonator unit cells are loaded between two antennas to examine the effect of unit cells on the rate of mutual-coupling reduction. By inserting the CSRR, the final design offered an improvement in decoupling by 8.5, 10.5, and 18 dB at 3.65, 4.9, and 5.8 GHz, respectively, compared with the reference antenna. By suppressing surface waves, antenna gain and front-to-back ratio are improved.

Keywords

Metamaterialmultiple-input multiple-output (MIMO)mutual couplingtriple-band complementary split-ring resonator
Type
Antenna Design, Modeling and Measurements
Information
International Journal of Microwave and Wireless Technologies , Volume 12 , Special Issue 8: Special Issue EuMW 2019. Part II , October 2020 , pp. 762 - 768
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Copyright
Copyright © Cambridge University Press and the European Microwave Association 2020

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