The document describes a proposed miniaturized ultra-wideband (UWB) multiple-input multiple-output (MIMO) antenna system with improved isolation for wireless applications. The antenna system consists of two C-shaped radiating elements on the top layer and two inverted L branches and a line slot etched on the slotted ground plane. Simulation results show the antenna operates from 3.1 GHz to 10.6 GHz with mutual coupling between elements below -10 dB and maximum gain of 4.16 dB. The slotted ground plane enhances miniaturization and reduces mutual coupling between antenna elements for improved isolation.