U.S. flag

An official website of the United States government

Official websites use .gov
A .gov website belongs to an official government organization in the United States.

Secure .gov websites use HTTPS
A lock ( ) or https:// means you’ve safely connected to the .gov website. Share sensitive information only on official, secure websites.

PUBLICATIONS

Broadband S-parameter characterization of a DC-SQUID amplifier

Published

Author(s)

Leonardo M. Ranzani, Lafe F. Spietz, Jose A. Aumentado

Abstract

In this work we characterize the 2-port scattering parameters of a superconducting quantum interference device (DC-SQUID) ampli er at 20 mK in the 2{8 GHz band. The measurement reference plane is positioned on a 6.25 microstrip line situated directly at the input and output of the device by means of a thru-reflect-line cryogenic calibration procedure. From the scattering parameters, we derive the device available power gain, isolation and input impedance over the 2{8 GHz range. This measurement methodology provides a path towards designing wide-band matching circuits for low impedance superconducting ampli ers operating at dilution refrigerator temperatures.
Citation
Applied Physics Letters
Pub Type
Journals

Download Paper

DOI Link
Superconducting electronics

Citation

Ranzani, L. , Spietz, L. and Aumentado, J. (2013), Broadband S-parameter characterization of a DC-SQUID amplifier, Applied Physics Letters, [online], https://doi.org/10.1063/1.48135 (Accessed April 19, 2024)

Created July 8, 2013, Updated October 14, 2020