A Modified Antipodal Vivaldi Antenna with Slot and Feed-line Cuts for Ultra-wideband Applications

A geometrically modified Antipodal Vivaldi Antenna (AVA) for applicable in Ultra-wideband (UWB) frequency is proposed in this paper. A conventional AVA is designed on a low-cost dielectric FR-4 substrate of size
${41\,\times\,35\,\times\,1.6\,mm^{3}}$
. Cuts are added on the radiating slots and feedline to improve bandwidth and gain. Design and optimization are done using a 3D electromagnetic simulator, High Frequency Structure Simulator (HFSS). The designed antenna operates in frequencies between 3.3 - 13.4 GHz (S11 < −10 dB) making it suitable for all Ultra-wideband applications. Maximum gain is 9 dB at 10.5 GHz.