H. Nguyen, J. Whittington, J. C Devlin, V. Vu and, E. Custovic. An Accurate phase calibration Technique for digital beamforming in the multi-transceiver TIGER-3 HF radar system PACal workshop Thursday 27 th September 2012 Department of Electronic Engineering, La Trobe University, Australia
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Accurate phase calibration for digital beamforming in the
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H. Nguyen, J. Whittington, J. C Devlin, V. Vu and, E. Custovic.
An Accurate phase calibration Technique for digital beamforming
in the multi-transceiver TIGER-3 HF radar system
PACal workshop Thursday 27th September 2012
Department of Electronic Engineering, La Trobe University, Australia
• A new generation digital SuperDARNradar
• Completely redesigned from the ground up
• Operates in a similar manner to existing radars, but capable of much more
• RF sampling with virtually all transmitter and receiver functions performed in the digital domain (in hardware)
• Through minimisation of analog circuitry and implementation of digital phase calibration and control virtually eliminate phase variation (particularly in receivers)
• Use of Field Programmable Gate Array (FPGA) enables possibility of reconfigurable hardware
TIGER-3
• One Transceiver per antenna
• Four times the transmit power: up to 2 kW
• Fewer losses in output filter and phasing matrix & switches (~12dB improvement)
• A hardware technique for rapid measurement and accurate measurement of phase differences has been developed as part of the TIGER-3 system
• This technique enables on-the-fly phase calibration, and correction of variable phase delays introduced by the RF analogue circuitry. Thus improving beamforming accuracy.