Compact antipodal Vivaldi printed antenna for ultra wideband application

In this paper, a design and implementation of compact antipodal Vivaldi printed antenna is proposed for ultra wideband (UWB) application. The antenna which is intended to work at frequency range of 1.5-3.5GHz is designed on an FR4 Epoxy dielectric substrate with the thickness of 1.6mm. In the design process, to have a compact antipodal Vivaldi printed antenna, the investigation is focused on its physical dimension with the reflection coefficient used as a key performance indicator. Two designs of antenna, i.e. single antenna and array of two antennas, are presented and then developed for the comparison. From the result, it shows that the realized single antenna has -10dB working bandwidth of 800MHz range from 1.6-2.4GHz. Meanwhile for the realized array antenna, it has -10dB working bandwidth of 1900MHz range from 1.6-3.5GHz.