UWB MIMO Antenna with Band-Notched Characteristic

A multiple-input-multiple-output (MIMO) band-notched antenna with a compact size of only 22 × 36 mm2 is proposed for ultra wideband (UWB) applications. The antenna consists of two square monopole-antenna elements, a T-shaped ground stub, a vertical slot cut on the T-shaped ground stub to reduce mutual coupling, and two strips on the ground plane and to create a notched frequency band. Simulation are used to study the antenna performance in terms of impedance matching, isolation between the two input ports, radiation pattern and peak gain. Results show that the antenna can operate from 3.1 to more than 11 GHz with a notched band in 5.15–5.85 GHz. The mutual coupling is less than ?15 dB. Results show that the proposed MIMO antenna is a good candidate for portable UWB applications