Watch-Type Multi-Band MIMO Antenna for Future 5G Communications

This paper proposes a small-sized watch-type multi-band MIMO antenna. The frequency band of this antenna covers LTE, WLAN and Wi-Fi 6 frequency bands. The SAR value complies with human body specifications and is suitable for wearable devices. The simulation results show a maximum gain of 4.55 dBi and a maximum efficiency of up to
$80{{\% }}$
. This antenna raises the possibility of multi-band in wearable devices, making communication applications richer.