Dual band Notched 2-port UWB MIMO antenna reconfiguration using lumped capacitors

In this paper, a dual port reconfigurable band-notched UWB MIMO antenna is presented to reduce the interference with WLAN and WiMAX applications. The suggested MIMO antenna is designed on RO 4350 substrate with partial ground plane for achieving the UWB frequency range with a band-notch at 5.4 GHz to avoid interference with WLAN application. An isolation structure is merged with the partial ground plane to achieve an isolation better than 17 dB between the two elements. Two pairs of lumped capacitors are embedded in the band stop resonators for achieving frequency reconfigurability by shifting the band stop behavior from 5.4 GHz to 3.5 GHz for interference mitigation with WiMAX application. The suggested MIMO antenna is experimentally fabricated and tested to validate the obtained simulated results since a good consistency between both results is achieved not only the impedance characteristics, but also the radiation and diversity outcomes. The new contribution of presented MIMO antenna is evident when it compared with state-of-the-art antennas which confirms the ability of the fabricated model to be utilized for various wireless communication applications in the microwave frequency range.