Design of Four-Element UWB-MIMO Antenna with Single Notched Band
This study presents the design of a high-isolation ultra-wideband(UWB)four-element multiple input multiple output(MIMO)antenna with a single notched band.The dimensions for this antenna are 65 mm×65 mm×0.8 mm.The four slot antenna units are placed horizontally and orthogonally,and the antenna is fed by a coplanar waveguide,facilitating ease of manufacture and integration.The defect ground and cross isolation branches are used for decoupling.Furthermore,a U-shaped slot is etched on the antenna radiation patch to create a notched band at 4.35-6.08 GHz,which effectively suppresses WLAN communication interference(5.15-5.825 GHz).The meas-ured operating band of the proposed antenna is 2.46-10.6 GHz,with an isolation level of less than-20 dB.The notched band is generated at 4.35-6.08 GHz,which effectively suppresses the WLAN interference.Additionally,the envelope correlation coefficient is maintained below 0.02,and the diversity gain exceeds 9.998.The measured performance is robust,demonstrating significant potential for extensive application in UWB-MIMO communication systems.
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