1. PHAROS PHased Arrays for Reflector Observing Systems
THE UNIVERSITY
OF BIRMINGHAM

2. Dissemination
Successful Faraday testing:

3. RECAP PHAROS System Parameters
Frequency range GHz (optimal for 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

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

8. Cryostat
Change to plexi glass Window

9. Control and calibration

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

11. 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

12. 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

13. 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

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

15. 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

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