A compact size ultra wideband MIMO antenna with simple decoupling structure

Designing a MIMO antenna for UWB communication has many challenges including the mutual coupling and the correlation between the neighboring elements of the antenna system. In this paper, we propose a compact size four elements MIMO antenna with simple cross shaped decoupling structure (DS) that is suitable for wide range of UWB applications. Our simulation results show that the proposed antenna provides good performance for wide range of UWB bandwidth from 4.5 to 10.6 GHz. Furthermore, many important parameters of the MIMO antennas such as radiation characteristics envelop correlation coefficient, and diversity gain are analyzed to evaluate the performance.