New Design of High-Efficiency Low-SAR Coupled Folded Antenna for 5G Applications

In this paper, the design and analysis of a highly efficient antenna with a low SAR rate is presented for a wide frequency band suitable for 5G mobile communications. The proposed antenna operates in N77, N78, N79 bands from 3 to 5 GHz. The antenna is designed in the form of a folded dipole antenna. It is divided into different coupled sections. Three configurations of the proposed antenna are studied based on the lower side below the folded dipole. These configurations include a complete ground plane, partial ground plane, and partial ground plane loaded with a printed EBG structure. Through this design, the return loss of -10 dB at all frequencies in the range of the antenna is achieved, and realized antenna gain equals 2.11 dB. The SAR analysis over 1 g tissue is also studied on the Hand Head Model by using CST Microwave Studio. The maximum SAR value obtained for the present design at resonant frequency 3.2 GHz is found to be 0.19 W/Kg which is quite safe for the human being.