Quad Port MIMO Al₂O₃ Ceramic-Based Integrated Reconfigurable Wideband Sensing and Communication Dielectric Antenna for 5G Cognitive Radio

In this article, a ceramic Al2O3 material-based MIMO reconfigurable integrated wideband sensing and narrow-band communication dielectric antenna for 5G cognitive radio (CR) application is presented. The proposed CR is a hybrid structure in which the antenna radiator is designed with a alumina (Al2O3) dielectric resonator (DR). The proposed Al2O3 material-based CR is integrated with a reconfigurable wideband antenna and a reconfigurable versatile filter (RVF). The primary function of RVF is to assist in the interweave and underlay CR operations. The proposed antenna performs multipurpose functions including sensing (Mode-1), interweaving (Mode-2), and underlay (Mode-3) CR. It offers a wideband between 1.87 and 4.43 GHz in Mode-1. It offers a tunable narrowband in Mode-2 between 1.76 and 3.82 GHz. It offers tunable band rejection between 1.64 and 3.26 GHz in Mode-3.