The Distributed Josephson Inductance Phase Shifter

Dale J. Durand, James Carpenter, Eric Ladizinsky, L. Lee, Charles M. Jackson, Arnold Silver, Andrew D. Smith

Research output: Contribution to journalArticlepeer-review

20 Scopus citations


We report on a novel microwave phase shifter featuring rapid electronic adjustment, continuous phase control, true time delay operation, high device fault tolerance, and very broad-band operation. By coupling a large number of superconducting quantum interference devices (SQUID’s) to a superconducting microstrip transmission line, we create a variable magnetic medium in which the wave velocity is controlled electronically. We have measured 60° phase shift at 10 GHz, and wideband operation from 5 to 15 GHz for an 8-cm long Nb transmission line coupled to 1600 SQUID’s, each containing a single Nb/A!Ox/Nb tunnel junction. The observed phase shift corresponds to a change in wave velocity of about 1 part in 60.

Original languageEnglish
Pages (from-to)33-38
Number of pages6
JournalIEEE Transactions on Applied Superconductivity
Issue number1
StatePublished - Mar 1992


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