A Radial Waveguide Power Divider Inspired Antenna for mmWave IoT Sensing Applications

This paper presents the design and investigation of a radial waveguide power divider (RWPD) based antenna with omnidirectional radiation characteristics for the 5G millimeter-wave IoT sensing applications. The presented antenna consists of a circular radiating loop, shorting vias, and eight non-uniform array dipole structures. The radiating circular loop is fed by an SMA connector, while the shorting vias are utilized to create a one-to-eight radial waveguide power divider to supply power to the eight different dipole structures. The antenna is modeled and manufactured on an 8 mils thick Rogers-RO003C substrate. The simulated and tested findings confirm that the antenna offers a –10 impedance bandwidth ranging from 28.39 – 28.97 GHz and a peak gain of 5.46 dBi with an omnidirectional radiation pattern. Due to its comprehensive set of performance attributes, particularly for the omnidirectional radiation characteristics, the suggested antenna is a viable candidate for 5G millimeter wave IoT sensing applications.