Directivity improvement of a Fabry-Perot cavity antenna by enhancing near field characteristic

Abstract

This paper presents an effective technique for radiation patterns improvement of a Febry-Perot cavity antenna by improving the near field phase distribution. A printed structure named phase correcting structure (PCS) is placed above the Febry-Perot cavity antenna to enhance phase uniformity along the H-plane by varying the size of metallic patches in the PCS. The achieved phase uniformity also results in 5.6 dBi increase in the peak directivity of the antenna.