Two Elements Orthogonally Placed UWB-MIMO for RADAR, Satellite and Terrestrial Communications

In this paper, a novel approach to design a compact ultrawideband (UWB) Multi-Input-Multi-Output (MIMO) antenna is presented. The proposed design consists of two elliptical monopoles placed orthogonal to each other for mutual coupling reduction. The design is integrated with three parallel coupled line strips for further mutual coupling reduction between the antenna elements. The physical dimension of the proposed design is 35 x 35 x 1.6 mm designed in low cost FR-4 substrate resulting in UWB characteristics in the WLAN range. The proposed design demonstrates good performance in the frequency range of 4.66 GHz to 12.42 GHz having large bandwidth of 7.76 GHz, with a mutual coupling of better than-20 dB in the entire band. The diversity performance, as measured by the correlation coefficient (ECC) and diversity gain (DG), is excellent, and within the acceptable range which proves that the proposed compact UWB MIMO antenna is a suitable candidate for RADAR, Satellite and Terrestrial Communications.