Dual band-notched ultrawideband MIMO antenna array

A compact planar dual band-notched ultrawideband (UWB) MIMO antenna array is presented. The proposed antenna array consists of two same elements which act as 3.4/5.5GHz dual band-notched UWB antennas on a printed circuit board. The antenna array is fed by using two 50Ω coplanar waveguide (CPW) transmission lines with two feeding ports. By placing a central metal strip between two radiating elements, the mutual coupling can be reduced. The proposed antenna array is successfully simulated, designed, and measured showing broadband matched impedance, stable radiation patterns and constant gain in terms of isolation of |S₂₁|<;-30dB. The calculated envelope correlation coefficient between two elements shows consistent diversity performance across the UWB bandwidth.