MIMO antenna system with high gain and low SAR at for UE of 5G operating MM wave: Design

A MIMO antenna array having high gain, low Specific Absorption Rate (SAR) and enhanced isolation for a mobile phone to be used in 5G cellular mobile communications is presented. The design challenges of 5G handset mobile antenna are work of interest in this paper. Embedment of multiple antenna elements for MIMO while maintaining high isolation, gain, minimum SAR evidences the competence of proposed antenna as best choice for future mobile communication phone. Proposed MIMO antenna supports LTE-700, GSM-850/GSM-900, and upper bands like UMTS, GSM-1800/GSM-1900, LTE-2200/LTE-2500, moreover 15GHz, 28GHz are also supported in 10-30GHZ range, that are expected to be only available frequencies for 5G cellular communication in future. And the Gain value of 4dBi:8dBi at various resonance frequencies is obtained. Higher frequency radiation effect will be more on user. SAR values for different frequencies are 0.07261W/Kg, 0.224W/Kg, and 0.3476 W/Kg at 0.7GHz, 0.85GHz and 2.2GHz, respectively.