A UWB Antipodal Vivaldi antenna with high gain using metasurface and notches

This paper presents a planar ultra-wideband Antipodal Vivaldi Antenna (AVA) working over a super ultra--wideband frequency range of 1.5-55 GHz, found to suffice for various communication standards including that of the 5G mm-Wave communication, microwave imaging, non-destructive testing, defense applications, etc. The proposed antenna, fabricated on a single layer Rogers substrate (RO4003C) having a dielectric constant of 3.38, has a compact dimension of 96 mm x 175 mm x 0.508 mm, i.e., 0. 80 x 0.875 x 0.00254 lambda 3 0, where lambda 0 is the free space wavelength at the lowest frequency of operation. The designed antenna has exponential flaring and a tapered slot edge. Moreover, an elliptical parasitic patch is placed between the flares of the AVA to improve the directive gain. Dielectric lens and metasurface are used to further enhance the gain. The measured return loss, radiation pattern, and gain of the designed AVA are found to be in good agreement with the results obtained from the full-wave electromagnetic simulation.