Compact Vivaldi antenna application in high-power design at X-band

In this paper, a miniaturized antipodal Vivaldi antenna (AVA) with circularly shaped loads and several elliptic slits embedded around the tapered slot is presented. Firstly, the several elliptic slits embedded in two tapered slots are introduced for wideband design at X-band. Next, two circularly shaped loads are utilized to make the value of max power capacitive grow from 0.47MW to 0.82MW. Meanwhile, the overall size of the prototype is minimized to 0.44λ <inf xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">middle</inf> ×0.42λ <inf xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">middle</inf> (13.2mm×12.6mm). The measurements of this prototype are presented and are in good agreement with simulations.