Perancangan Antena Mikrostrip Array MIMO 2x2 dengan Metode Slit Pada Frekuensi Kerja 3,5 GHz untuk Sistem Komunikasi 5G

This study proposes a 2x2 multiple input multiple output (MIMO) microstrip array antenna design with the slit method for a 5G communication system capable of working at a frequency of 3.5 GHz. The antenna is designed using Duroid RO5880 substrate with a dielectric constant value of 2.2, dielectric loss of 0.0009, and a thickness of 1.57 mm. Array and MIMO techniques are used to increase the gain and directivity of the proposed antenna. In addition, MIMO also serves to increase the level of acceptance in multi-user applications. The addition of the slit method aims to reduce the dimensions and increase the bandwidth of the antenna. From the simulation results, the return loss value is -38.89 dB at a frequency of 3.5 GHz with a bandwidth of 241 MHz. The gain obtained from the simulation results is 11.13 dB at a frequency of 3.5 GHz. The isolation loss value obtained is -74.34 dB with a distance between MIMO elements of 40 mm. The application of the slit, array and MIMO methods proposed in this study is able to increase the gain by 42.13% than the single element. In addition, the proposed research has succeeded in reducing patch dimensions by 7.44% and enclosure 28.99% compared to 2x2 MIMO array antennas without slit. The proposed MIMO antenna also has the Envelope Correlation Cofficient (ECC) and Diversity Gain (DG) values that meet the required threshold for MIMO