A Novel SRR Metamaterial Inspired CPW-Fed Dual Band MIMO Antenna for Sub-6 GHz 5G Application

The metamaterial inspired novel CPW fed MIMO antenna design works based on the principle of non bianisotropic-split-ring resonator and amalgamation of hexagonal open ring resonator (Hex-ORR) thereby resulting in a miniaturized antenna with dimensions of 47.4 x 31.7 x 1.6 mm3. The two NB-SRR antennas are placed in opposite directions with an edge distance of 0.022?0. To eliminate the bianisotropic property of the split ring resonator which produces the effect of anisotropy and cross polarization. the NB-SRR is proposed in which the rings are aligned together from end to end of the metal strip, which helps in improvising the bandwidth to a higher frequency. This antenna holds decent for the Sub-6 GHz 5G application covering bandwidth of 983.5 MHz (3.7887-2.8052 GHz) and 551.6 MHz (6.3834-5.3818 GHz) with center frequency of 3 GHz and 6 GHz, respectively. The lower frequency band is produced using hex-ORR, and a higher frequency band is provided using NB-SRR. The size of the antenna is optimized by considering the Non Bianisotropic-SRR size minor than the resonant wavelength. The average isolation loss between the antenna elements is -25 dB, the radiation gain is 5 dBi, and the efficiency is 97%. The proposed MIMO antenna parameters such as ECC, CCL, and TARC are also examined, and the results indicate that the proposed antenna design is a good candidate for Sub-6 GHz 5G applications.