A four-element planar UWB-MIMO antenna system comprising of plus-sign stub for high isolation

Abstract

A four-element planar UWB-MIMO antenna system with plus-sign stub (for achieving high isolation) is proposed here. The complete antenna system is constructed on 52mm x 52mm, FR-4 substrate (dielectric constant=4.3). The structure consists of 4 identical antenna elements, with each element placed orthogonal to its adjacent element on the top of the substrate. The partial ground plane with circular slots is utilized on the back of the substrate. The antenna is simulated using CST Microwave Studio. Simulated S 11 <2 is present throughout the band. The impedance bandwidth of 126.58% shows its candidature for many wireless UWB communication applications.