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A wide-band tunable phase shifter for radio-frequency reflectometry

Published 13 Dec 2014 in physics.ins-det and cond-mat.mes-hall | (1412.4200v1)

Abstract: Radio-frequency reflectometry of nanodevices requires careful separation of signal quadratures to distinguish dissipative and dispersive contributions to the device impedance. A tunable phase shifter for this purpose is described and characterized. The phase shifter, consisting of a varactor-loaded transmission line, has the necessary tuning range combined with acceptable insertion loss across a frequency band 100 MHz - 1 GHz spanning most radio-frequency experiments. Its operation is demonstrated by demodulating separately the signals due to resistance and capacitance changes in a model device.

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Authors (3)

  1. G. Yin 
  2. G. A. D. Briggs 
  3. E. A. Laird 

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