JGBdV RadioNet Westerbork Nov 2006

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PHAROS

PHased Arrays for Reflector Observing Systems

THE UNIVERSITY OF BIRMINGHAM

JGBdV RadioNet Westerbork Nov 2006

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Faraday Prototype

Test runs at WSRT repeated in July and October this year

Good results on the final run:

Full match between simulation and measurements!

JGBdV RadioNet Westerbork Nov 2006

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Faraday Prototype

More details reported next week …….

JGBdV RadioNet Westerbork Nov 2006

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RECAP PHAROS System Parameters

Frequency range 4 - 8 GHz (optimal for 4.0 - 7.0 GHz) Number of antenna elements 2x (14 x 13) = 364 Number of beams 4, with 13 elements per beam Polarisation single Tsys < 20 K

JGBdV RadioNet Westerbork Nov 2006

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Cryostat enclosure

JGBdV RadioNet Westerbork Nov 2006

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Beam-former

JGBdV RadioNet Westerbork Nov 2006

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Antenna array

JGBdV RadioNet Westerbork Nov 2006

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JGBdV RadioNet Westerbork Nov 2006

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power splitters

beam- former

LNAs

Beam-former

JGBdV RadioNet Westerbork Nov 2006

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Cryostat

JGBdV RadioNet Westerbork Nov 2006

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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 RadioNet Westerbork Nov 2006

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Advanced technology MMIC run

70nm GaAs mHEMT run executed• Designs from, MECSA/INAF, ASTRON and CSIRO

• LNAs, 0.4GHz - - 100GHz

• Vectormods, phaseshifter

JGBdV RadioNet Westerbork Nov 2006

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Summary progress

Antenna array: prototyping completed, to be ordered MMICs: Produced tested and available Cryostat: design completed, to be ordered

• Waiting for BF finalization

Beamformer: prototyping completed, final design needed Control and Calibration: principle design done

JGBdV RadioNet Westerbork Nov 2006

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Summary progress, constraints

UMAN progress on hold for 4 months due to priority shift UMAN design/production and test of the BF on the critical

path due to (too) late start: direct impact on schedule

• Delay causes project efficiency problems (€?)

JGBdV RadioNet Westerbork Nov 2006

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Summary progress, euros

MECSA: completion expected within budget ASTRON: manhour costs overrun expected INAF: no budget constraints UBIR: no budget constraints TCfA: no budget constraints UMAN: tbd