Design of an array based on an antipodal balanced Vivaldi antenna

Due to the many breakthroughs in the field of based pulse radars and ultra wide bandwidth (UWB) systems, researches of every component of those systems have been performed in recent years. As well as, in order to match the great bandwidth that pulse-based radar needs to optimally work, UWB antennas were developed for this purpose. In this paper an array based on an antipodal balanced Vivaldi antenna is studied by simulating firstly a unique Vivaldi antenna element and analyzing its return loss, gain, etc. Then a five element antenna array was built in the HFSS simulator. The gain, as it was expected, has been increased to be closed to 16 dBi and maintaining the good S11 performance of one single Vivaldi antenna.