부산대학교 도서관

In this work, a novel way of reducing mutual coupling and triple-ultra wideband (UWB) Multiple-input multiple-output (MIMO) antenna for 5G millimeter-wave (mm-wave) communications is proposed. The MIMO design consists of four antenna elements fed at the vertex. The antenna elements are loaded at the top and bottom of the substrate at a distance of 1.1 mm respectively to minimize the effect of mutual coupling. Thus, the isolation achieved a maximum of 36.26 dB. The dimension of the proposed MIMO antenna is 30 mm × 25 mm × 0.8 mm. A fractional bandwidth (FBW) of 51% (23.26-36.91 GHz) and a maximum gain of 10.27 dBi is achieved at 40.48 GHz. In addition, the radiation efficiency of more than 85% is obtained in the frequency range of 23.26 - 43.01 GHz. The peak envelope correlation coefficient of the proposed structure is less than 0.003. The designed antenna is simulated, fabricated and measured; a good agreement between simulation and measurement results were achieved. The performance of the proposed antenna is compared with the existing mm-wave MIMO antennas in literature.