Design of Slotted Patch MIMO Antenna and Investigation of Antenna Parameters for Sub-6 5G Network

Abstract

A "Multiple-input-multiple-output (MIMO)" antenna with dual band features is presented herein research work and is taken into consideration for the unlicensed National Information Infrastructure radio band (n77, n78, and n46). Simple single-patch MIMO antennas give way to two-element MIMO antennas through a gradual development process. Using circular slots on the main patches, two Microstrip antennas are integrated. The development of numerous band features also makes use of reduced ground. In order to attain excellent isolation, Rectangular Metallic Strip (RMS) is used. Given that it covers two important frequency bands, the proposed MIMO antenna offers a considerable advantage. With a 2.18 GHz total bandwidth, the antenna system resonates at 3.26 GHz and 5.4 GHz. A 1.6 mm thick FR4 substrate was used in the antenna's design. A 8.2 mm feed line with an inset feed is employed, and a specifically designed SMA connector with perfect electrical conductor (PEC) and Teflon is used for simulation purposes in order to enhance impedance matching. Radiation properties such as mean effective gain, envelope correction coefficient, reflection coefficient, and others are investigated and researched. Less than -10 dB is the value of both the isolation and the reflection coefficient, with the former being less than -30 dB. Having this two-element, smaller MIMO antenna is very beneficial for 5G applications.