PHAROS PHased Arrays for Reflector Observing Systems
description
Transcript of PHAROS PHased Arrays for Reflector Observing Systems
JGBdV PHAROS RadioNet Grenoble April 2007
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PHAROS
PHased Arrays for Reflector Observing Systems
THE UNIVERSITY OF BIRMINGHAM
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Successful Faraday testing:
Dissemination
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RECAP PHAROS System Parameters
Frequency range 4 - 8 GHz (optimal for 4.0 - 7.0 GHz) Number of antenna elements 364 Number of beams 4, with 13 elements per beam Polarisation single Tsys < 20 K
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Cryostat enclosure
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Antenna array
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power splitters
beam- former
LNAs
Beam-former
Design in progress Digital control
tested at temps < 70K
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Cryostat
Change to plexi glass Window
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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
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Advanced technology MMIC run
70nm GaAs mHEMT run executed
Performance similar to “difficult to access” US foundries
Samples received, testing in progress
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Summary progress
Antenna array: To be assembled and tested: May MMICs: Available Cryostat: Ordered, tests finished in June Beamformer: prototyping completed, final design needed Control and Calibration: principle design done, hardware protos
required
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Summary progress, constraints
UMAN restarted Design, production and test completed in Nov. 2007 Final integration and test Dec. 2007 Antenna pattern measurement and calibration Jan/Feb 2008 Test on Lovell March 2008
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Summary progress, euros
MECSA no budget constraints ASTRON man hour constraint: extension contract
J Simons required, not budgeted: 25k € other management and system design
extended with 1 year: 25k€ INAF no budget constraints UBIR no budget constraints TCfA no budget constraints UMAN tbd
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PHAROS testing
European and Australian telescopes….. 1) Lovell (+25m dish for Holography on astronomical source)
2) Parks ?
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High lights
Successful performance PHAROS/ASTRON team at 3rd International Focal Plane Array workshop Sydney
PHAROS only FPA project that aims for low Tsys • First demonstrator MIRI: < 100K
• First demonstrator APERTIF: < 100K
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Conclusion
Good progress most packages Overall delay of one year not budgetary neutral