Modification of a Commercial Phase Shifter for Cryogenic Applications

  • Richard F. BradleyEmail author
Part of the Springer Proceedings in Physics book series (SPPHY, volume 211)


Conventional radio frequency matching techniques using silicon-based phase shifters operate well at ambient temperatures, but will perform poorly in cryogenic environments due to carrier freeze-out. However, varactors made from gallium arsenide retain carrier mobility at such temperatures. This paper describes the modification and evaluation of a commercial phase shifter operating in the UHF frequency range for cryogenic applications.


Cryogenic Coupling Phase shifter Electronic Silicon-based Germanium-based Axion Commercial Impedance matching Antenna Dark matter 


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Copyright information

© Springer International Publishing AG, part of Springer Nature 2018

Authors and Affiliations

  1. 1.National Radio Astronomy ObservatoryNRAO Technology CenterCharlottesvilleUSA

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