OPTIMIZATION OMNI-DIRECTIONAL 2 × 2 MIMO ANTENNA FOR INDOOR 2G, 3G, 4G, AND 5G APPLICATIONS

Due to the cohabitation of multiple types of communication networks and the increasing need forhigh-speed data transmission, multi-frequency and broadband communication systems have gained popularityas study topics. Omnidirectional antennas can handle more individual frequency bands and areuseful for a variety of wireless communications devices due to their radiation pattern, which facilitateseffective transmission and reception from a mobile device. However, for mobile communication systemssupporting 2G, 3G, 4G, and future 5G applications, the use of a high-bandwidth antenna may be crucial.Since 5G offers its vast user base higher data speed, greater dependability, and reduced power consumption,numerous studies on 5G broadband antennas have been published. Because of its many advantages,such as higher channel capacity, better signal transmission and reception performance, the ability toplace big antennas in tiny spaces, and more, MIMO has emerged as a crucial technology for 5G. A numberof different 5G MIMO antenna types have recently been suggested for cellphones. An indoorGSM/3G/LTE/5G communication system using a 2 × 2 wideband MIMO antenna is suggested in thisstudy. The antenna uses two antenna elements evenly spaced around the centre to form an omnidirectionalradiation pattern. Simultaneously, excellent omnidirectional emission properties and a broad bandwidthare obtained. An impedance bandwidth of (0.7-5.3) GHz can be accomplished with a return loss of up to -23 based on the simulation results, with a gain of up to 6.5 dB. ANSYS HFSS (High Frequency StructureSimulator) 2020 is used to simulate the antenna.