A miniaturization ultra-wideband (UWB) multiple-input-multiple-output (MIMO) antenna with triple-notched band function is presented in the paper. There are two similar monopole radiators in the UWBMIMO system. Based on half-cutting method, the system only occupies 21×27 mm2. Three inverted L-shaped slots are inserted to get three rejected bands for suppressing interference from 3.5 GHz WiMAX, 5.5 GHz WLAN, and 8.1 GHz X-band. With a T-shaped stub extruding from the ground plane, both impedance bandwidth and port isolation are effectively impro...