A quad port MIMO antenna with improved bandwidth and high gain for 38 GHz 5G applications

With this paper, a novel 2 × 2 Multiple Input Multiple Output (MIMO) antenna for forthcoming 5G applications is introduced. The design of the MIMO antenna comprises of four modified rectangular patches and a perforated ground plane, achieved through circular and rectangular patterns, to meet the desired objectives. The antenna is constructed on Roger RT/duroid 5880 substrate, with physical measurements 35×30×0.8mm3 and a dielectric constant of 2.2. The proposed antenna has undergone simulation and analysis utilizing both the High-Frequency Structure Simulator (HFSS) and Computer Simulation Technology (CST) in order to confirm its utility. The antenna has a wide spectrum of 8.9 GHz resonating from 34.8 to 43.7 GHz. The suggested antenna has a peak gain of approximately 10.24 dBi at 38.70 GHz. Additionally; it has an isolation below −20 dB. The MIMO antenna that has been simulated exhibits strong diversity characteristics, including a low envelope correlation coefficient (ECC < 0.0002), minimal channel capacity loss (CCL < 0.4), a significant reduction in total active reflection coefficient (TARC < −8 dB), and a substantial diversity gain (DG > 9.999). The suggested MIMO antenna covers the n260 band (37–40 GHz) and the n259 band (39.5–43.5), which is widely used in different countries, such as the USA, Canada, Korea and Australia. All these findings and the small size demonstrate the capabilities of the designed antenna for future 5 G applications.