Performance Enhancement of UWB Antenna Using FSS Layer for millimeter-wave 5G

This research encapsulates the design of a compact Ultra-Wide Band (UWB) antenna resonating in 5G mm-wave, covering the respective n257, n258, and n261 bands. The circular patch with slots aids in enhancing the gain and radiation efficiency of our proposed antenna. The antenna's bottom ground plane is Defected Ground Structure (DGS), which aids in extending its bandwidth. The antenna is compact, having a dimension of 12×12 mm
²
. This antenna has a wide bandwidth of 19.73 GHz and a maximum efficiency of 91%. A Frequency Selective Surface (FSS) with L shaped unit cell is used at the antenna's back end (5 mm) to increase gain even further, achieving a maximum gain of 8.24 dBi. The antenna element for our proposed antenna is mounted over a Rogers RT 5880 substrate. Two circular parasitic elements are designed on the bilateral side of the feedline to facilitate a better radiation pattern.