A Wide Bandwidth 4×4 MIMO Microstrip Antenna with High Gain and Isolation Operating at 38 GHz

Affectively 5G antennas operating at mm-Wave bands with small size, high gain and large bandwidth are required to meet the desired high data rate and overcome of attenuation effects at mm-Wave bands. In this paper, single element and two elements are designed and analyzed at 38 GHz, based on the optimal configuration of two elements antenna with good propagation properties, a four-element MIMO microstrip antenna is proposed and modeled by a Computer Simulation Technology (CST) software to operate at 38 GHz. The antenna is designed on FR-4 substrate has a thickness of 0.76 mm, a dielectric constant of 4.3, and a loss tangent of 0.025. The overall gain, diversity gain (DG), and envelope correlation coefficient (ECC) are used in evaluating the performance of the suggested four-element MIMO antenna. Moreover, the effects of changing of phase ports are done in order to make more improvement of overall realized gain of four-element microstrip antenna. Additionally, the optimal design of a 4-element antenna is compared with antennas that have been published in the literature to demonstrate the reliability of the design.