Bow-tie Slot Antenna Loaded with Superstrate Layers for 5G/6G Applications

In this paper, a printed ridge gap waveguide (PRGW) based bow-tie slot antenna loaded with superstrate layers is designed for 5G/6G applications. Three layers of cylindrical shaped superstrate material are cascaded forming dielectric lens shape. These layers cover the antenna slot and used to improve both the antenna gain and bandwidth. To implement these layers, a perforation technique is provided to achieve the equivalent effective dielectric constant surrounding the cylindrical shaped layers. The antenna gain is enhanced by 1.6 dBi through loading the antenna with the lens structure, while the operating bandwidth is almost doubled to be in the range 30.5-39.5 GHz.