A Dual Polarized All Metal Ultra-Wideband Vivaldi Antenna Array with 70° Scan Ability

This paper presents dual polarized all metal ultra-wideband Vivaldi antenna arrays with 70 degrees scan ability. The antennas are fabricated from a monoblock metal structure. Accordingly, the arrays do not require any soldering or screwing process for the electrical connection of their main body to a ground plane. Thanks to this manufacturing process advantage, the antenna is robust to harsh environmental conditions, and features high polarization purity, low reflection and wide scan characteristics in the principal planes (E, H, and D). Sample tapered and stepped antenna array designs are optimized with respect to improved mechanical tolerances, and their simulation results are provided. According to full wave simulation results, the antennas operate from 1.42 to 20.68 GHz (1:14 frequency ratio) at broadside for a voltage standing wave ratio (VSWR) specification of 2:1.