A Novel Dual-band 28/38 GHz Slotted Microstip MIMO Antenna for 5G Mobile Applications

Abstract

A novel dual-band two port Multiple-Input-Multiple-Output (MIMO) antenna at 28/38 GHz bands for the approaching 5G wireless applications is configured and manufactured in this paper. The MIMO antenna takes in identically positioned two rectangular slotted patches with inverted I-shaped slots at the lower border of the mobile substrate. The system has an overall size of 55 × 110 × 0.508 mm <sup xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">3</sup> . The antenna works in a 1.0683 (27.58-28.649) GHz bandwidth at 28 GHz and 1.4306 (37.213-38.643) GHz 38 GHz. A defected ground construction (DGS) to raise the isolation among the two ports and magnify the antenna radiation is introduced. The isolation is further desirable than -29.4 dB and -27.3 dB for the higher and lower frequencies, respectively among antenna elements. The MIMO antenna is planned and optimized through CST-MW Studio 2017 simulator as well as by measurement. The results from simulation and measurement are in a good agreement in the meaning of reflection coefficients and mutual coupling of the introduced MIMO antenna.