Design and Analysis of Near Field Mid-frequency Metamaterial lens loaded Vivaldi Antenna

Abstract

This paper presents the extended research of the near field phase correcting metamaterial lens (PCL) loaded Vivaldi antenna. The mid-frequency PCL is designed based on the extracted phase error along polarization direction at 10 GHz from full-wave simulation. The mid-frequency PCL could balance the gain enhancement and gain bandwidth of the Vivaldi antenna effectively. Further, comparison of gain between the high- and mid-frequency PCL loaded Vivaldi antenna is made. The results reveal that chosen of the reference frequency of phase error is of vital importance to gain enhancement over entire band and overall profile of the antenna.