A Monopolar Metasurface Dielectric Resonator Antenna With Wide Bandwidth for IoT Applications

This work introduces a novel metasurface (MS) antenna for the network of Internet of Things (IoT) gateway. The suggested antenna technology combines the MS with a dielectric resonator antenna (DRA) to provide a stable conical radiation pattern over the entire operating bandwidth in its compact size. This invention aims at increasing the structural suitability while maintaining good radiation characteristics, including wide bandwidth, high efficiency, omnidirectional radiation, and low-cross-polarized level. First, a compact DRA with a small ground is studied. Then, the MS loaded on the DRA with a pair of shorting walls is investigated. The proposed antenna is reduced by 96.5% of volume in comparison to a commercial monopole base-station antenna as well as a conical-radiation indoor antenna. This devoted antenna design is a good candidate applied to large-scale IoT networks of airports, train stations, logistic centers, hospitals, libraries, supermarkets, and super stores.