A compact Vivaldi antenna for wideband application

In this paper, a miniaturized Vivaldi antenna is presented. A Vivaldi antenna with a novel feeding structure is selected as the basic design and resistive loading is used at the end of it to make a compact structure. The proposed antenna is fabricated with the size of 140mm (length) *139mm (width)*1mm (thickness). The test results, which agree with the simulation results, indicate that the bandwidth is 0.44~3GHz (S
₁₁
<;-10dB) and the gain ranges from -4.9dB to 7.70dB.