Vivaldi antenna gain

Hi!
Which are parameters that affects gain of the Vivaldi antenna? Is in length, taper hight, or something else? What is max gain I can obtain from Vivaldi antenna at cca. 1.8 Ghz?
Thanks in advance

Hi,

Check the paper " A parameter study of Stripline-Fed vivaldi Notch Antenna Arrays" by Joon Shin and Schaubert. Just google out, you will get it.

Habeeb.

Theoretically the gain could be up to 10dBi but a normal peak gain value is around 5dBi.