JGBdV PHAROS RadioNet Grenoble April 2007

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PHAROS

PHased Arrays for Reflector Observing Systems

THE UNIVERSITY OF BIRMINGHAM

JGBdV PHAROS RadioNet Grenoble April 2007

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Successful Faraday testing:

Dissemination

JGBdV PHAROS RadioNet Grenoble April 2007

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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

JGBdV PHAROS RadioNet Grenoble April 2007

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Cryostat enclosure

JGBdV PHAROS RadioNet Grenoble April 2007

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Antenna array

JGBdV PHAROS RadioNet Grenoble April 2007

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JGBdV PHAROS RadioNet Grenoble April 2007

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00 00 0 00 0 00

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power splitters

beam- former

LNAs

Beam-former

Design in progress Digital control

tested at temps < 70K

JGBdV PHAROS RadioNet Grenoble April 2007

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Cryostat

Change to plexi glass Window

JGBdV PHAROS RadioNet Grenoble April 2007

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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 PHAROS RadioNet Grenoble April 2007

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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

JGBdV PHAROS RadioNet Grenoble April 2007

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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

JGBdV PHAROS RadioNet Grenoble April 2007

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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

JGBdV PHAROS RadioNet Grenoble April 2007

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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

JGBdV PHAROS RadioNet Grenoble April 2007

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PHAROS testing

European and Australian telescopes….. 1) Lovell (+25m dish for Holography on astronomical source)

2) Parks ?

JGBdV PHAROS RadioNet Grenoble April 2007

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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

JGBdV PHAROS RadioNet Grenoble April 2007

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Conclusion

Good progress most packages Overall delay of one year not budgetary neutral