 |
Journal articles
Tunable microwave impedance matching to a high impedance source using a Josephson metamaterial
Abstract : We report the efficient coupling of a 50 Ω microwave circuit to a high impedance conductor. We use an impedance transformer consisting of a λ/4 co-planar resonator whose inner conductor contains an array of superconducting quantum interference devices (SQUIDs), providing the resonator with a large and tunable lineic inductance L ∼ 80µ 0 , resulting in a large characteristic impedance Z C ∼ 1 kΩ. The impedance matching efficiency is characterized by measuring the shot noise power emitted by a dc biased high resistance tunnel junction connected to the resonator. We demonstrate matching to impedances in the 15 to 35 kΩ range with bandwidths above 100 MHz around a resonant frequency tunable in the 4 to 6 GHz range.
Cited literature [29 references]
https://hal-cea.archives-ouvertes.fr/cea-01479016
Contributor : Dominique Girard <>
Submitted on : Tuesday, February 28, 2017 - 3:32:16 PM
Last modification on : Monday, February 10, 2020 - 6:12:22 PM
Long-term archiving on: : Monday, May 29, 2017 - 3:41:07 PM
Contributor : Dominique Girard <>
Submitted on : Tuesday, February 28, 2017 - 3:32:16 PM
Last modification on : Monday, February 10, 2020 - 6:12:22 PM
Long-term archiving on: : Monday, May 29, 2017 - 3:41:07 PM
File
1404.1792.pdf
Files produced by the author(s)