October 17, 2019 2

ASKAP: Phased array feeds for radio astronomy

ASKAP: Phased array feeds for radio astronomy

[Music plays] (Narrator) Since humans first looked
skyward the star filled heavens have been a source of constant
fascination and amazement, inspiring us to better
understand the cosmos, as well as our place within it. Australia’s CSIRO has long supported
this quest for understanding, developing innovative
technologies for radio astronomy, a key science that
allows investigation in to the complex history
of the universe. For more than 60 years our
engineers and technicians have worked together in developing
leading edge technologies needed to receive, amplify and
process the cosmic radio waves that travel through the
incomprehensible distances of space. A key challenge facing
radio astronomers is the limited region of sky that can be seen by
conventional telescope receivers at any one particular time. Now, we’ve developed a
revolutionary new receiver, the Phased Array Feed, or PAF,
that will address this challenge. It will open up an antenna’s
field of view and increase survey speeds by
more than a factor of 20. (Dr Ball) The Phased Array
Feeds will revolutionise all of radio astronomy by
offering us the opportunity to view a
large part of the sky all at once, and to survey the entire sky
very quickly and repeatedly. We’ll just be able to get
a totally different perspective on the universe
that we’re a part of. (Dr Hay) We’re opening
up a new area of technology with this innovation that has this ability to operate
over a very large frequency range with full sampling of the
electro-magnetic wave front. It combines electro-magnetics,
electronics of low noise devices that are embedded
in to this antenna, and also real time digital
signal processing. There’s no receiving technology
of this form at the moment, and it will enable astronomy
programmes that would take ten years to be completed in a
matter of months. (Dr Collings) Certainly it’s attracted
people already to Australia, through the Square
Kilometre Array programme. But well beyond that, the other
applications and the spin-offs of the technology include medical
imaging of the human body, security and surveillance
applications, and a whole range
of other areas. And that’s a challenge that
an engineer just loves, because its cutting edge new
research, and it’s practical. (Narrator) The PAF will transform
the way we survey the sky, and have a major impact,
enabling breakthroughs in the way we understand
the universe.

2 Replies to “ASKAP: Phased array feeds for radio astronomy”

  • 2jpu524 says:

    I found a paper that looks into the noise temperature measurements of the new feed. I'm curious about the noise temperature, and the cross-channel isolation.. "Measured Aperture-Array Noise Temperature of the Mark II Phased Array Feed for ASKAP"

  • Stram Amindale says:

    Wow, more fake stuff. Where did they get their equipment from a 60's bad scifi movie leftovers?
    Science is a religion that i have walked away from.

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