ABSTRACT
This chapter proposes a printed monopole radiator-based two-element array for Internet of Things (IoT)-based applications and commercial 5G (3.3–3.8 GHz) connectivity. The proposed array’s single element is a wide-band antenna, and it is configured by superimposing seven successive Fibonacci squares. Two pairs of slots have been carved from each corner of the latest Fibonacci series-based square geometry in order for the structure to resonate properly at the desired frequency. A four-fold topology was considered and used during the antenna design to create the final innovative shape. The top layer of Roger 5880 PCB material is laminated with the proposed square-based slotted structure, while the layer underneath is employed as a partial ground plane. The solo antenna’s signal quality evaluations, scattering parameters, and group delay measurements have all been performed in the time-domain in the CST microwave studio. The single radiator provides the wide-impedance bandwidth of 2.30 GHz, which has resonant frequencies of 2.40 and 3.60 GHz, respectively. In order to achieve improved parametric results, a two-element linear array was also designed. The array’s bandwidth responsiveness is enhanced by implementing the Wilkinson power divider built into the feed network’s architecture. The array geometry has two resonant notches at 2.42 and 3.62 GHz, respectively. Both antennas give sufficient gain, shallow x-pol., good aperture efficiency, and excellent radiation efficiency. An above 30 dB/m correction factor has been achieved from both the antennas, which indicates that the effect of electromagnetic interference is minimal. The proposed antennas are suitable candidates for commercial 5G communications and IoT-based applications.
