1 / 16

Progress Report on PHAROS Phased Arrays for Reflector Observing Systems

This report details the advancements in the PHAROS phased arrays at the University of Birmingham, including successful testing of the system within the 4-8 GHz frequency range. Key parameters involve an antenna array with 364 elements, producing 4 beams with a low system temperature (Tsys < 20K). Development is ongoing for the cryostat and beamformer, with initial designs and prototypes completed. Testing is set to be conducted on the Lovell telescope, marking the project's promising trajectory despite minor delays and budget constraints.

shad-pace
Télécharger la présentation

Progress Report on PHAROS Phased Arrays for Reflector Observing Systems

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  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

More Related