Circular Shape Dual Element MIMO Antenna for 5G (Sub-6GHz) Application

In this article, a two-element multiple-input multiple-output (MIMO) design is suggested for use in sub-6 GHz 5G wireless access points operating in the 3–4 GHz frequency range. The proposed antenna uses microstrip fed circular shape and the optimized bandwidth and isolation are obtained using an E-shaped stubs associated with partial ground plane. Ansys HFSS simulations are used to describe the proposed antenna's design process. Each antenna element has a peak gain of 2.12dBi. Simulated results are verified with measured results and found a good agreement between them. The diversity performance of MIMO antenna is also studied with envelop correlation coefficient (ECC)
$<\ \mathbf{0.15},\mathbf{DG}\approx \mathbf{9.98}\mathbf{dB}$
and mean effective gain (MEG)-ratio within
$\pm \mathbf{3}\ \mathbf{dB}$
. The proposed antenna is designed on FR-4 substrate with a dimension of
$\mathbf{30}\times \mathbf{20}\times \mathbf{1.6}$
cubic millimeter.