AselfcalibrangreceiverforEOR detec-on - caastro.org · AselfcalibrangreceiverforEOR detec-on ......

A self-‐calibra-ng receiver for EOR detec-on Keith Bannister | CSIRO Bolton Fellow | [email protected] 24 Aug 2012

CSIRO ASTRONOMY AND SPACE SCIENCE (CASS)

•  Alex Dunning •  Aaron Chippendale •  Paul Roberts

A CSIRO Skunkworks project with

Self-‐calibraHng receiver for EOR | Keith Bannister

•  Why a self calibraHng receiver •  Preliminary results •  Conclusions

This talk


•  There are many sources of frequency structure in a total power measurement, e.g.:

•  Mismatch •  Bandpass (gain) •  LNA downward noise •  LNA upward noise •  Antenna resisHve loss

•  All of the above can change with Hme (although some more than others)

•  The aim of a self-‐calibraHng receiver is to measure these parameters in-‐situ, conHnuously or periodically

Why a self-‐calibra-ng receiver?



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•  We can measure and correct for a number of parameters reasonably well:

•  S11 •  Gamma

•  Other parameters we’re sHll working on: •  Gain/bandpass variaHons

•  Fielding a unit will be the next step, once the bench calibraHon is proven

Conclusions


Astronomy and Space Science Keith Bannister Bolton Fellow t +61 2 9359 4953 e [email protected]

ASTRONOMY AND SPACE SCIENCE

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AselfcalibrangreceiverforEOR detec-on - caastro.org · AselfcalibrangreceiverforEOR detec-on ......

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