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In this paper, a novel compact dual band-notched ultra-wideband (UWB) multiple-input multiple-output (MIMO) antenna of size 22×26×0.8mm3 is proposed for portable devices. The antenna comprises of two stepped slot UWB antennas fed by 50ohms microstrip line, T-shape slot and narrow slot. Dual band-notches from 5.4 to 5.86GHz and 7.6–8.4GHz are achieved by loading trident-shape strips on microstrip line...