Paper Title
Design Of Novel Vivaldi Antenna For Cognitive Radio Application In Ultra Wide Band

As the traffic in wireless channels is growing day by day we need smarter devices to adapt and manage working in such networks. Cognitive radio is one such elegant solution. A frequency reconfigurable antipodal Vivaldi antenna (AVA) is presented covering whole UWB (3.1GHz-10.6GHz) at particular switch position for cognitive radio application. Reconfiguring it to achieve several narrow bands at various switch configurations. We achieved reconfiguration with the help of switches in the feed line .The proposed antenna was designed and analyzed by using software HFSS(High frequency structure Simulator)13.0. The proposed antenna uses FR-4 substrate. Keyword- Cognitive Radio, Ultra Wideband (UWB), Antipodal Vivaldiantenna (AVA), Reconfigurable Antenna.