Design of a PRS-Based Wideband Circularly Polarized 2 X 2 MIMO Antenna for 5G / Millimeter Wave Communication

In this research work, a multiple input multiple output (MIMO), circular polarized (CP) antenna with Partially Reflective Surface (PRS) is presented for fifth generation (5G) communication systems having low profile and wideband operation. The antenna is made by square patch and a partially reflecting surface (PRS) of high dielectric above the substrate layer. The wideband circular polarized (CP) radiations are achieved by pruning the orthogonally opposite patch corners and cutting a rectangular slot diagonally. As per simulation results, the designed PRS-based antenna has a broad 10 dB impedance bandwidth and 3-dB axial ratio bandwidth. Moreover, the proposed antenna design is used to create a 4-port MIMO antenna by putting each of the element orthogonal to each other. The designed PRS based MIMO antenna has excellent multeity performance in terms of envelope correlation coefficient (ECC), separation between antenna elements and diversity gain even without any devoted decoupling structure. Most notably, the bandwidth in which antenna is operating covers the millimeter wave frequency band 24.5-28.5 GHz which is designated for 5G applications. Above mentioned characteristics make suggested antenna system appropriate fit for 5G sensors, smart devices and other 5G applications.