|Image of the Vivaldi.|
The Vivaldi antenna probably got its name from its violin shaped curves. Also known as the exponentially tapered slot antenna (ETSA), this antenna is commonly used in > 3 GHz ultra wideband microwave applications. The Vivaldi was also requested by a number of Antenna Magus users. It has an end-fire radiation pattern and can produce a symmetric beam, in the E- and H- plane, over a wide frequency band.