Electronic Multi Beam - A new Radio Astronomy ConcEpt
EMBRACE is based on the Aperture Array concept promising to cover
the science goals associated with observations to be conducted at low
frequencies 0.1 – 2.0 GHz that is to say the lower end of the
frequency range SKA should cover.
The main objectives of EMBRACE are to demonstrate the technical and
scientific potential of the Aperture Array concept using a low cost
phased array station with the essential Square Kilometre Array (SKA)
functionality in combination with the Westerbork Synthesis array.
Multi beam, a new technology
EMBRACE is planned as an array with multiple independent Fields of
View (FoV) capabilities, producing multi beam. It will be the first of
its kind for radio astronomy.
A multiple independent Fields of View array can point in different
direction simultaneously. Such a flexible system offers the prospect
of supporting many users to carry out separate astronomical programmes
at the same time.
See movie (© Michael Kramer)
This technology allows us to null out interfering signals (at the
sites being investigated for the SKA there will be no TV transmitters
but the unwanted emissions from satellites will need to be dealt
|No of indep. FOV:
||<100 deg K@ 1GHz (aim for 50deg K)
|Ant. element phase control:
||3 or 4 bit
|No of digital beams:
||8 of 20 MHz per FOV