2-PAD Hardware: From Antenna to Beamformer

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2-PAD Hardware From Antenna to Beamformer

• Adam Baird
• Hamid Dabiri Khah
• Kris Zarb-Adami
• Mark Jones
• Mike Jones
• Paul Grimes
• Peter Hastings
• Rik Elliot
• Richard Armstrong
• Sascha Schediwy

• Aziz Ahmedsaid
• Chris Shenton
• Georgina Harris
• Richard Morrow
• Richard Whitaker
• Tim Ikin
• Tony Brown

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High Gain Antenna

• Cost 350 (mostly metal)
• For 2 polarisations
• 3-dB Beamwidth 18o
• Gain 12.5 dBi

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Differential Low Noise Amp

• Power 100 mW
• Cost 2 per polarisation
• Noise Figure 0.8 0.1 dB (60K)
• S21 18 2 dB
• S11 -15 2 dB

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Analogue Cable Driver

• Power 1W per polarisation
• Cost 10 per polarisation
• Gain 54 dB
• Gain flatness 0.5 dB

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Cable and Balun Board

• Cable Cost 10 per polarisation
• Quad channel fan-out
• Passive components only

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Signal Conditioning Module

• Cost 500 per polarisation
• Power 1W per polarisation
• High and Low, anti-aliasing channels
• ADC differential driver
• Logic controlled from FPGA

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Data Acquisition Board

• Cost 1000 per polarisation
• Power 1.5 W per polarisation
• ADC 0.5 W per polarisation
• FPGA 1.0 W for channelisation

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Processing Technology

• Berkeley Hardware Benchmarking system
• 2 x Dual-channel ADCs
• 1 x Virtex-2 FPGA
• 775 per polarisation
• 2.5 W per polarisation
• Fine-grained Power Management

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Summary

• Total Cost per polarisation 1700
• Total Power per polarisation 5 W
• Total Cost for 2-PAD 220,000 (280,000 )
• Total Power for 2-PAD 640 W
• Total Cost per polarisation 1200
• Total Power per polarisation 5 W
• Total Cost for 2-PAD 155,000 (200,000 )
• Total Power for 2-PAD 640 W
• Analogue Power should be a serious concern for
  the future as this does NOT scale with technology

SKADS-UK
CASPER
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e-ASIC technology

• Power per polarisation is decreased by 1W over
  the latest FPGA
• New techniques which do not require the large NRE
  associated with new semiconductor processes
• Short turn-around time and design based on
  standard FPGA platforms
• No volume requirements

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Extra slides