Gregorian offset antenna and log-periodic dual polarized feed for the square kilometre array

Abstract

The focus of this research is on the reflector dish design for the Square Kilometre Array (SKA), using Offset Gregorian optics as the prototype for Phase 1 SKA antennas. The aim is to obtain an optimum design using specialized GRASP9 software. Simulations of designs are carried out over a range of frequencies between 0.3 and 3 GHz, by constructing a generalized script to suit the user's requirements over a range of several parameters. Subsequently, an appropriate feed is designed, specifically investigating the beam patterns of a log-periodic, dual-polarized feed, radiating a Gaussian beam.