Wideband Vivaldi Antenna and 2 X 8 Antenna Array Design

In this paper, an ultra-wideband Vivaldi antenna is proposed and designed. From the simulated results, it indicates that the relative bandwidth of the Vivaldi antenna reaches 134%(2.5-12.6GHz), and the gain reaches a maximum of 13.04dB at 10.58GHz. In order to meet the needs of higher gain and enhance the directivity of the antenna, a 2 X 8 antenna array is presented. The simulation results show that the active standing wave ratio is less than 3 in the bandwidth of 2.5-10GHz, and the gain is significantly improved. Subsequently, in order to carry out physical processing test, virtual elements are loaded around the antenna array to maintain the consistency of the boundary conditions of the array, forming a 4x10 antenna array, and each peripheral virtual element is loaded with matching load. The unit of the antenna array can satisfy the VSWR<2 within the bandwidth of the real test, which is in good agreement with the simulation results of the antenna.