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PHAROS PHased Arrays for Reflector Observing Systems

THE UNIVERSITY OF BIRMINGHAM. PHAROS PHased Arrays for Reflector Observing Systems. Dissemination . Successful Faraday testing:. RECAP PHAROS System Parameters. Frequency range 4 - 8 GHz (optimal for 4.0 - 7.0 GHz) Number of antenna elements 364

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PHAROS PHased Arrays for Reflector Observing Systems

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  1. THE UNIVERSITY OF BIRMINGHAM PHAROSPHased Arrays for Reflector Observing Systems

  2. Dissemination • Successful Faraday testing:

  3. 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

  4. Cryostat enclosure

  5. Antenna array

  6. Beam-former beam- former power splitters • Design in progress • Digital control tested at temps < 70K LNAs

  7. Cryostat • Change to plexi glass Window

  8. Control and calibration

  9. Advanced technology MMIC run • 70nm GaAs mHEMT run executed • Performance similar to “difficult to access” US foundries • Samples received, testing in progress

  10. 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

  11. 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

  12. 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

  13. PHAROS testing • European and Australian telescopes….. • 1) Lovell (+25m dish for Holography on astronomical source) 2) Parks ?

  14. 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

  15. Conclusion • Good progress most packages • Overall delay of one year not budgetary neutral

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