Performance Analysis of Hexagonal slots inspired Frequency reconfigurable MIMO antenna for 5G-Sub 6 GHz Applications

This article presents hexagonal slot inspired frequency reconfigurable MIMO antenna for 5G-Sub 6Ghz applications. The designed antenna is printed on top of 45x20 mm² compact size substrate (FR4) with thickness of 0.8 mm. To acquire reconfigurability initially hexagonal slot is etched out from ground plane and placed a Trishul-shaped strip on the ground plane. Furthermore, by integrating PIN diodes (D1/D2) at the lower edge of a Trishul-shaped metallic strip in the ground plane, the proposed antenna has the potential to attain reconfigurability in frequency responses. The designed antenna resonates at 3.5 GHz when PIN diodes are in OFF state and resonates at 5.5 GHz when PIN diodes (BAR64-3W) are in ON state. To achieve isolation <-15dB, U shape is etched out from ground. The proposed antenna has stable radiation patterns with gain ranging from 3.1dB to 3.9dB and also offers more than 75% radiation efficiency in ON/OFF state. The proposed reconfigurable MIMO antenna also offers good diversity performance in terms of parameters like ECC<0.5 and DG>9.5 in both states of PIN diodes. The simulated and measured results demonstrate that designed antenna with reconfigurability achieves satisfactory MIMO performance with low mutual coupling and good diversity performance.