Electronic band-gap integrated low mutual coupling dual-band MIMO antenna

ABSTRACT

In this paper, a reduced mutual coupling dual-band multiple-input-multiple-output (MIMO) antenna is reported. A thin rectangular slot is incorporated into an unlicensed 5.2 GHz band rectangular patch antenna (RPA) to excite another industrial, scientific and medical (ISM) 2.4 GHz band. In the $1\times 2$ MIMO configuration, antennas are closely placed at a distance of ${\lambda }_{max}/8$ and the mutual coupling between antenna elements is suppressed by incorporating a dual-band electronics-bandgap (EBG) structure. A mushroom kind of EBG arrangement with two different square-shaped plates on the top and the bottom of the EBG is done to exhibit dual-band rejection characteristics. MIMO communication parameters, envelope correlation coefficient (ECC), diversity gain (DG), and multiplexing efficiency (${\eta }_{MUX}$) are calculated exhibiting excellent performance of the proposed antenna. Prototype of the antenna is fabricated and good agreement is found amongst simulation and measured results.

KEYWORDS:

• Diversity gain
• electronic bandgap
• envelope correlation coefficient
• MIMO antenna
• multiplexing efficiency
• rectangular patch antenna

Disclosure statement

No potential conflict of interest was reported by the authors.