Manufacture and Measurement of Circularly Polarized Ka-Band Radiating Elements for SatCom Wide-Angle Phased Arrays Tiles

Abstract

This paper presents the manufacture and measurements of a circularly polarized cavity-backed patch antenna for active electronically Ka-band array with a beam scanning capability over a wide-angle range (+/-60°). The proposed unit-cell is manufactured in two versions for both 18-20 GHz (Rx) and 28-30 GHz (Tx) bands. It comprises an upper patch coupled to a dual pin-fed lower patch, both separated by a metal grid spacer. The proof of concept is given through simulation and experimental measurements on Rx and Tx mockups.