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

Abstract

Multi-frequency and wideband communication systems have developed into a popular research
topic as a result of the rising demand for high-speed data transfer and the coexistence of
several types of communication networks. The radiation pattern of Omni-directional antennas
allows for effective transmission and reception from a mobile unit, making them handy for a number
of wireless communication devices as well as capable of handling additional distinct frequency
bands. Implementing a wide bandwidth antenna, however, might be important for mobile communication
systems supporting 2G, 3G, 4G, and upcoming 5G applications. Numerous studies on 5G
wideband antennas were published because the 5G network allows for larger data throughput,
greater robustness, and lower power consumption for its vast user base. The MIMO technology
has developed into a key technology for 5G applications because of the benefits include increasing
channel capacity, boosting the performances of transmitting and receiving signals, fitting large
antennas into a small space, and more. Recently, several varieties of 5G MIMO antennas for
smartphones were proposed. This research proposes a wideband 2 × 2 MIMO antenna for indoor
GSM/3G/LTE/5G communication systems. The antenna in use produces Omni-directional radiation
patterns by employing two antenna elements that are evenly spaced out around the center.
Concurrently, a large bandwidth and good omnidirectional radiation performance are attained.
According to simulation results, a gain of up to 7.5 dB can be used to obtain an impedance bandwidth
of (0.7-7) GHz with return losses as high as -22. The antenna is simulated by ANSYS HFSS
(high frequency structure simulator) 2020.