LAUSR

In this research article, a wideband antipodal Vivaldi antenna (AVA) is presented by incorporating a negative index metamaterial (NIM). The proposed antenna is designed using a linearly tapered shape structure. The overall performance of the designed antenna is improved by employing a negative index metamaterial (NIM). The ‘V’ shaped metamaterial unit cells are designed and placed at the top surface in between two radiators of AVA, to radiate the maximum electric field in the end-fire direction. The designed antenna dimensions are 50 mm × 24 mm × 0.51 mm and it is compact as compared to AVA antennas available in the literature. The maximum gain of the designed antenna is 15.26 dBi at 41.3 GHz. The antenna gain is almost constant and varies in the range of 9.25 ± 1.75 dBi over the operating frequency range of 15 GHz to 40 GHz. The optimized design of an antenna makes it suitable for various micrometer and millimeter wave applications. Also, the measured results matched with the simulated results.