Design Approach for Frequency Reconfigurable Vivaldi Antenna with Pentagon Slot Resonator

With the current state of affairs in the development of antennas in the wireless communication field, the need of compact multiband, multifunctional and cost effective antenna is increased. The study of reconfigurable antennas has made great progress in recent years. They are lighter in weight, smaller in dimension and lower in price. Again, the reconfigurable antennas can offer variety of features like change in operating resonant frequency, polarization, and radiation pattern. As a result of the significance of frequency reconfigurable antennas, along with extensive literature survey, a Vivaldi antenna has been chosen as a basic structure due to the fact that it can operate over wide bandwidth. In addition, it also has a well defined radiation mechanism where most of the current flow is at the edge of the tapered slot. The antenna could be a suitable solution for a multimode application which requires wideband and frequency reconfigurable antennas, such as in military applications and cognitive radio. This paper presents new design of slot resonator with its different parameter.