A novel approach in calculating V-I curves of a DC-SQUID coupled to a planar input coil

Author

Hildebrandt, G. ; Uhlmann, F.H. ; Daalmans, G.M. ; Bommel, F.R.

Author_Institution

Tech. Univ. of Ilmenau, Germany

Volume

6

Issue

1

fYear

1996

fDate

3/1/1996 12:00:00 AM

Firstpage

19

Lastpage

23

Abstract

The influence of a planar input coil on the V-I characteristics of a dc-SQUID (superconducting quantum interference device) has been analyzed by means of computation and experimental investigation. An extended electrical model of the input coil based on transmission lines has been proposed. The frequency behavior of this model has been validated with an expanded copper model. The V-I characteristics of DC-SQUIDs have been calculated with this extended circuit model using a SPICE-type circuit analysis program. The results have been compared with measurements of niobium dc-SQUIDs. In this paper the relationship between the V-I characteristics of the SQUID and the coupling impedance of the washer is demonstrated.

Keywords

SPICE; SQUIDs; characteristics measurement; niobium; superconducting coils; superconducting device testing; DC-SQUID; Nb; SPICE-type circuit analysis program; V-I curves; coupling impedance; electrical model; planar input coil; superconducting quantum interference device; transmission line model; Couplings; Distributed parameter circuits; Frequency; Interference; Planar transmission lines; Quantum computing; SQUIDs; Superconducting coils; Superconducting devices; Superconducting transmission lines;

fLanguage

English

Journal_Title

Applied Superconductivity, IEEE Transactions on

Publisher

ieee

ISSN

1051-8223

Type

jour

DOI

10.1109/77.488276

Filename

488276