MIMO Antenna Array for mm-wave 5G Smart Devices

This paper demonstrates a compact Multiple-Input Multiple-Output (MIMO) antenna supporting millimeter-wave (mm-wave) 5G communication applications. The antenna structure proposed in this work is a two-port MIMO antenna system, where each MIMO element consists of 1×2 linear array fed with parallel feed network. The prototype is designed on Rogers R043S0B substrate with the board dimensions of 25×35×0.762 mm
³
. Defected Ground Structure (DGS) is incorporated to optimize the performance of the demonstrated structure. The resonant frequency band covered by the MIMO antenna array ranges from 38.8- 42.9 GHz, thus covering 4.1 GHz wide bandwidth. Whereas, the peak gain attained for the resonant band is 9.86 dB. Moreover, significant isolation is obtained between the MIMO elements. In addition, diversity performance of the demonstrated antenna structure is analyzed through Envelope Correlation Coefficient (ECC), Total Active Reflection Coefficient (TARC), Mean Effective Gain (MEG), and Channel Capacity Loss (CCL). The simple structure, planar configuration, and radiation characteristics validates the presented MIMO antenna array as a suitable candidate for the forthcoming mm-wave 5G applications.