In 1979, Gibson proposed a tapered slot antenna also known as a Vivaldi Antenna [1]. Vivaldi antenna is the present invention relates to improvement in antennas. In particular the present invention relates to broadband of the Vivaldi, notch or tapered slot antenna family. The exponential flare shape was originally adapted to requirement for a constant beamwidth antenna which could cover the microwave frequency range between 2 GHz and 20 GHz.