On-dish measurements from CSIRO’s newest phased-array feed (PAF) have confirmed low-noise performance across the entire ASKAP frequency band.
Results for the Mk II PAF, installed on ASKAP Antenna 29 at the Murchison Radio-astronomy Observatory, show a doubling of the low-noise bandwidth when compared to the Mk I PAF.
The Mk II results demonstrate:
– Doubled sensitivity and quadrupled survey speed above 1,400 MHz (compared to the Mk I)
– A minimum system-temperature-on-efficiency of 78 K at 1,230 MHz
– System-temperature-on-efficiency of 95 K or better across the 835–1,800 MHz range