JGBdV RadioNet Westerbork Nov 2006
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PHAROS
PHased Arrays for Reflector Observing Systems
THE UNIVERSITY OF BIRMINGHAM
JGBdV RadioNet Westerbork Nov 2006
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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 2006
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Faraday Prototype
More details reported next week …….
JGBdV RadioNet Westerbork Nov 2006
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RECAP PHAROS System Parameters
Frequency range 4 - 8 GHz (optimal for 4.0 - 7.0 GHz) Number of antenna elements 2x (14 x 13) = 364 Number of beams 4, with 13 elements per beam Polarisation single Tsys < 20 K
JGBdV RadioNet Westerbork Nov 2006
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Cryostat enclosure
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Beam-former
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Antenna array
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power splitters
beam- former
LNAs
Beam-former
JGBdV RadioNet Westerbork Nov 2006
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Cryostat
JGBdV RadioNet Westerbork Nov 2006
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pointing, status flags
telescope
Control module
commands
auxiliary hardware
FPA
monitoring information
commands
TCP/IP client/server
RS/USB/I2C communication
module
Operation log
Data archivecommands
monitoring information
monitoring data
command history
Predefined settings
commands
Monitoring module
Graphical command interface
Textual command interface
Script interpreterScript files
Calibration module
Control and calibration
JGBdV RadioNet Westerbork Nov 2006
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Advanced technology MMIC run
70nm GaAs mHEMT run executed• Designs from, MECSA/INAF, ASTRON and CSIRO
• LNAs, 0.4GHz - - 100GHz
• Vectormods, phaseshifter
JGBdV RadioNet Westerbork Nov 2006
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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 2006
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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 (€?)
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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