A Compact Four Port UWB-MIMO Antenna With Notch Band Characteristics And High Isolation

A simple four port antenna with Ultra-wide band (UWB) and multiple-input multiple-output(MIMO) behavior is proposed using two shared radiators. the two shared radiators are making 180° angle to each other. The problem of interference in broad-band of UWB from other sources is avoided by forming notch band at 5.5GHz center frequency. The proposed design is of size 48×48mm² using FR4 Substrate (dielectric constant 4.4) and fed by micro strip line. The two shared radiator multiple-input multiple-output antenna provides a bandwidth of 2.9 to 11.4 GHz with reflection coefficients S₁₁, S₂₂, S₃₃, S₄₄ very less than -10dB and all the mutual coupling coefficients for respective antenna elements are less than or equal to -22 dB. The design also provides triple frequency bands characteristics with wide band behavior. Also, In order to achieve low mutual coupling, the meandered line stub is utilized at the end of the ground plane. The stimulated outcomes of proposed design are shown.