JGBdV RadioNet Westerbork Nov 2006 1 PHAROS PHased Arrays for Reflector Observing Systems THE UNIVERSITY OF BIRMINGHAM.

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Presentation transcript:

JGBdV RadioNet Westerbork Nov PHAROS PHased Arrays for Reflector Observing Systems THE UNIVERSITY OF BIRMINGHAM

JGBdV RadioNet Westerbork Nov Faraday Prototype  Test runs at WSRT repeated in July and October this year  Good results on the final run: Full match between simulation and measurements!

JGBdV RadioNet Westerbork Nov Faraday Prototype  More details reported next week …….

JGBdV RadioNet Westerbork Nov RECAP PHAROS System Parameters  Frequency range GHz (optimal for GHz)  Number of antenna elements 2x (14 x 13) = 364  Number of beams 4, with 13 elements per beam  Polarisation single  T sys < 20 K

JGBdV RadioNet Westerbork Nov Cryostat enclosure

JGBdV RadioNet Westerbork Nov Beam-former

JGBdV RadioNet Westerbork Nov Antenna array

JGBdV RadioNet Westerbork Nov

9 power splitters beamformer LNAs Beam-former

JGBdV RadioNet Westerbork Nov Cryostat

JGBdV RadioNet Westerbork Nov Control and calibration

JGBdV RadioNet Westerbork Nov Advanced technology MMIC run  70nm GaAs mHEMT run executed Designs from, MECSA/INAF, ASTRON and CSIRO LNAs, 0.4GHz GHz Vectormods, phaseshifter

JGBdV RadioNet Westerbork Nov Summary progress  Antenna array: prototyping completed, to be ordered  MMICs: Produced tested and available  Cryostat: design completed, to be ordered Waiting for BF finalization  Beamformer: prototyping completed, final design needed  Control and Calibration: principle design done

JGBdV RadioNet Westerbork Nov Summary progress, constraints  UMAN progress on hold for 4 months due to priority shift  UMAN design/production and test of the BF on the critical path due to (too) late start: direct impact on schedule Delay causes project efficiency problems (€?)

JGBdV RadioNet Westerbork Nov Summary progress, euros  MECSA: completion expected within budget  ASTRON: manhour costs overrun expected  INAF: no budget constraints  UBIR: no budget constraints  TCfA: no budget constraints  UMAN: tbd