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Hampson, Grant
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document
ASKAP Beamformer
Abstract
The SKA will be the mainstay of centimeter astronomy much ofthis century.It will have a sensitivity that is more than an order of magnitude greater than current radio telescopes.A second area for improved performance is field of view.For frequencies above 1GHz this may be achieved by placing a Phased Array Feed (PAF) at the focus of the SKA dishes.The design of the signal processing chain to convert the signal from a PAF to multiple independent beams on the sky is a major challenge.This paper describes the approach used by the Australian SKA Pathfinder (ASKAP) to achieve this.The approach leads to a telescope that has a 30 square degree field of view at 1.45GHz.