Open AccessMutual coupling reduction using near‐zero ε and μ metamaterial‐based superstrate for an MIMO application
Author(s) -
Mark Robert,
Singh Harsh Verdhan,
Mandal Kaushik,
Das Soma
Publication year - 2020
Publication title -
iet microwaves, antennas and propagation
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.555
H-Index - 69
eISSN - 1751-8733
pISSN - 1751-8725
DOI - 10.1049/iet-map.2019.0382
Subject(s) - metamaterial , decoupling (probability) , mimo , permittivity , materials science , antenna (radio) , electronic engineering , antenna factor , reduction (mathematics) , electrical impedance , optoelectronics , antenna measurement , physics , engineering , electrical engineering , dielectric , mathematics , beamforming , control engineering , geometry
Here, a near‐zero permittivity (ε) and permeability ( μ ) metamaterial superstrate is presented as a decoupling structure for a multiple‐input–multiple‐output (MIMO) antenna. The proposed design offers peak isolation of 41 dB with reduced edge separation of 0.042 λ o at the resonating frequency. To verify the simulation results, the prototype of the proposed superstrate and antenna is fabricated and tested. The two‐element MIMO antenna has −10 dB impedance band of 5.5–5.92 GHz with a peak measured gain of 7.41 dBi and efficiency above 78%. The measurement results ensure an isolation enhancement of 30 dB with a correlation coefficient of <0.26 within the operating band. The proposed method offers a good design technique for high gain and a closely packed MIMO antenna system for WLAN applications.