title: Two-port microwave calibration at millikelvin temperatures.
abstract: In this work we introduce a system for 2-port microwave calibration at millikelvin temperatures operating at the coldest stage of a dilution refrigerator by use of an adapted thru-reflect-line algorithm. We show that this can be an effective tool for characterizing common 50 Ω microwave components with better than 0.1 dB accuracy at temperatures that are relevant to many current experiments in superconducting quantum information.
authors.affiliation: National Institute of Standards and Technology, Boulder, Colorado 80305, USA. leonardo.ranzani@colorado.edu
authors.forename: Leonardo
authors.initials: L
authors.lastname: Ranzani
authors.forename: Lafe
authors.initials: L
authors.lastname: Spietz
authors.forename: Zoya
authors.initials: Z
authors.lastname: Popovic
authors.forename: José
authors.initials: J
authors.lastname: Aumentado