Current distribution in superconducting thin-film strips

Author

Lee, L.H. ; Orlando, T.P. ; Lyons, W.G.

Author_Institution

Dept. of Electr. Eng. & Comput. Sci., MIT, Cambridge, MA, USA

Volume

4

Issue

1

fYear

1994

fDate

3/1/1994 12:00:00 AM

Firstpage

41

Lastpage

44

Abstract

A closed-form expression is presented for the current distribution in an isolated strip made from a superconducting thin film with thickness less than a few penetration depths. This equation gives a good approximation within certain limits for the resistance and inductance per unit length of superconducting striplines and microstrip lines. Both the ac resistance of an isolated superconducting strip and the resistance per unit length of a superconducting stripline calculated using this closed-form expression agree well with the numerical results generated by the modified Weeks´ method. The possibility of using this expression along with the integral equation method to develop an efficient full-wave method for analyzing superconducting planar transmission lines is discussed.<>

Keywords

current distribution; electric resistance; integral equations; microstrip lines; penetration depth (superconductivity); strip lines; superconducting microwave devices; superconducting thin films; ac resistance; closed-form expression; current distribution; efficient full-wave method f; inductance; integral equation method; isolated strip; microstrip lines; penetration depths; resistance; resistance per unit length; superconducting planar transmission lines; superconducting striplines; superconducting thin-film strips; thickness; AC generators; Closed-form solution; Current distribution; Equations; Inductance; Microstrip; Stripline; Strips; Superconducting thin films; Superconducting transmission lines;

fLanguage

English

Journal_Title

Applied Superconductivity, IEEE Transactions on

Publisher

ieee

ISSN

1051-8223

Type

jour

DOI

10.1109/77.273063

Filename

273063