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A Four-element Triple-band MIMO Antenna for 5G Smartphone Applications

A triple band multi-antenna system with four elements to cover 3.3-6 GHz in the future 5G smartphone applications is proposed. The presented antenna consists of four feeding elements and four T-shaped radiating elements which have operability in 3.3-4.2 GHz (n77), 4.8-5 GHz & 5.1-5.9 GHz range. For 3.3-4.2 GHz (n77) & 4.8-5 GHz, the antenna is fit for 5G new radio (NR) application while for 5.1-5.9 GHz, the antenna performance is suitable for WLAN application. The antenna is simulated which can be placed on the inner surface of the side-edge frame of the smartphone. The proposed MIMO antenna has better isolations (less than -20 dB), efficiency (62-80%) and their envelope correlation coefficient (ECC) is much less than 0.1 in the operating band. The peak gain of the antenna is 5.5 dBi. The proposed MIMO antenna will be promising for future 5G smartphone applications.