PHAROS PHased Arrays for Reflector Observing Systems

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PHAROSPHased Arrays for Reflector Observing
Systems
2
System
Cryostat enclosure
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System

• 4 close overlapping beams
• Focus on 6.7 GHz
• Instantaneous bandwidth determined by telescope
  back-end (200-500MHz)

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Antenna array

• Antenna array evaluated with radome
• Full S-par data measured

5
Beamformer

• Cryogenic test of first phase/amplitude control
  modules
• Control works
• LNA modules to be assembled

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Cryostat
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Advanced technology MMIC run

• 70nm GaAs OMMIC mHEMT run executed (250GHz fT)
• Performance similar to difficult to access InP
  US foundries
• CSIRO 1-50GHz LNAs
• MECSA 40GHz, 100GHz LNA
• ASTRON 0.2-2GHz LNA

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PHAROS testing

• 1) Lovell (25m dish for Holography on
  astronomical source)

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Summary progress

• Antenna array Available, shipped
• MMICs Available
• Cryostat Available, ready to be shipped
• Beamformer Prototyping completed, final
  design completed, production ongoing
• Control Calibration Principle design done,
  control hardware on prototype o.k., more work
  needed

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UMAN Beamformer schedule
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Summary progress, constraints

• Design, production and test completed in 1st Dec
  2009
• Final integration and test end Dec 2008
• Measurement and calibration Feb 2009
• Test on Lovell April 2009

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Summary progress, euros

• MECSA no budget constraints, finished
• ASTRON difficulty maintaining system evaluation
  work in 2009
• INAF no budget constraints, (nearly) finished
• UBIR no budget constraints, finished
• TCfA Issue to continue after 1st Sept
• UMAN no budget constraints

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Faraday evaluation

• Full analyses report under review

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APERTIF

• Based on Faraday / PHAROS knowledge
• Digital Focal Plane Array on Westerbork

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Conclusion

• No engineering roadblock
• Schedule issues to be discussed