Effects of Spread in Critical Currents for Series- and Parallel-Coupled Arrays of SQUIDs and Bi-SQUIDs

Author

Berggren, Susan ; de Escobar, Anna Leese

Author_Institution

SPAWAR Syst. Center Pacific, San Diego, CA, USA

Volume

25

Issue

3

fYear

2015

fDate

Jun-15

Firstpage

1

Lastpage

4

Abstract

High-temperature-superconductor (HTS) superconducting quantum interference devices (SQUIDs) have a much greater variance in the values of the critical currents than their low-temperature-superconductor counterparts. To explore the effects of this increased variance, we add a noise term into the critical current of each junction. We perform numerical simulations of previously derived phase equations from series- and parallel-coupled arrays of SQUIDs, and series-and parallel-coupled arrays of bi-SQUIDs. These results support ongoing work to design an electrically small magnetic field antenna and low-noise amplifier with high bandwidth using HTS SQUIDs.

Keywords

SQUIDs; antennas; critical currents; high-temperature superconductors; Bi-SQUIDs; critical current spread; high temperature superconductor superconducting quantum interference devices; low noise amplifier; magnetic field antenna; parallel coupled arrays; series coupled arrays; Critical current density (superconductivity); Equations; Josephson junctions; Junctions; Linearity; Mathematical model; SQUIDs; Numerical simulations; superconducting quantum interference devices (SQUIDs); superconducting quantum interference filter (SQIF); superconductors;

fLanguage

English

Journal_Title

Applied Superconductivity, IEEE Transactions on

Publisher

ieee

ISSN

1051-8223

Type

jour

DOI

10.1109/TASC.2014.2359375

Filename

6905774