Interference cancellation using an array feed design for radio telescopes

Radio frequency interference (RFI) is a growing problem for radio astronomers. We investigate the use of a phased array feed in order to allow for RFI mitigation with a single reflector. Our primary goal in the design of an array feed is to optimize the array for RFI cancellation while also achieving high sensitivity and beam steering capability. The phased array feed should also produce a higher sensitivity as compared to a single standard waveguide feed. Other design goals include gain stability and low beam shape distortion for steered beams.