Adjustable Dielectric Resonator Antenna With Parasitic Elements for 5G SAGOI-IoT Applications

With the development of modern communication and the Internet of Things (IoT) in the need to provide seamless interconnection between heterogeneous devices, we design an adjustable-distance resonant antenna suitable for 5G communication. The antenna meets the multiangle radiation requirements of the antenna for flexible positioning of IoT devices and conforms to the concept of green Internet basic hardware, with low energy and small size. In our design, three parasitic elements will couple with the higher order modes through the slot-hole excitation of a higher order mode dielectric resonator antenna with a dielectric constant of 10. By controlling the distance between the three parasitic elements and changing the capacitor at their terminals, radiation variation in multiple directions can be achieved. The proposed model focuses on the relationships among the three element distances and the effect of the third parasitic element on the radiation angle. Good results were obtained for gain, bandwidth, and radiation angle. Through simulation, the dielectric resonator antenna works successfully in the 15-GHz frequency band. Thus, the antenna array can be from −34° to 34° in the horizontal direction and from 0° to −36° in the vertical direction. At the same time, the gains are kept at a good level and the bandwidths are greater than 2 GHz. Compared with other dielectric resonant antennas, the parameters of this antenna are not reduced, and the flexibility of the radiation direction angles is increased. These evaluation parameters are considered ideal conditions for device-to-device communication in 5G IoT applications.