Asymmetric Flared Vivaldi MIMO Antenna for 5G Millimeter Wave Communication

Abstract

Background:: As a panacea for most of today's wireless communication problems, recently, the evolution and demand for mm-wave devices and antennas are increasing for their use in different applications and future millimeter wave communication. A 4-port miniaturized Asymmetric Vivaldi MIMO (Multiple Input Multiple Output) antenna is designed and presented for millimeter wave communication. Method and Meterial:: The top side is made up a flared shape patch with an oval shape structure, while the back side is made up of partial ground with flare shaped structure to achieve minimum mutual coupling. The Vivaldi structure is used on a low-cost FR4 dielectric substrate for wide bandwidth and high gain with a loss tangent of 0.02. The designed MIMO has an overall size of 31 x 40 mm2. The proposed MIMO covers a 20-40 GHz dual frequency band. Result:: The achieved isolation between antenna elements is more than 53.40 dBi, which shows the low mutual coupling between antenna elements. The simulated response for the proposed antenna is reported in terms of gain, ECC, surface current distribution, VSWR, returns loss, and directivity and shows the MIMO antenna’s good performance characteristics. Conclusion:: Both the simulated and measured results are presented, and it shows good agreement between them.