High-Temperature Superconducting Coplanar Left-Handed Transmission Lines and Resonators

Author

Wang, Yi ; Lancaster, Michael J.

Author_Institution

Sch. of Eng., Univ. of Birmingham

Volume

16

Issue

3

fYear

2006

Firstpage

1893

Lastpage

1897

Abstract

This paper implements wideband, low-loss, and via-free left-handed transmission lines (LH-TLs) using superconductor thin films. Introducing superconductors greatly reduces the loss inherited in the constituent series capacitors and shunt inductors of such planar LH-TLs. The measured results agree very well with design expectations. The bandwidth of left-handed characteristics is 4.9-10.9 GHz, with a minimum insertion loss of 0.03 dB at 30 K. Open-ended LH-TL resonators are also characterized at the different harmonics; of special interest are those with zero or negative phase constants, which are not possible when using any conventional transmission lines. Temperature-dependence measurements of the LH-TLs reveal the effect of the superconductor kinetic inductance

Keywords

coplanar transmission lines; high-temperature superconductors; metamaterials; superconducting resonators; superconducting thin films; 30 K; 4.9 to 10.9 GHz; capacitors; coplanar left-handed transmission lines; high-temperature superconducting thin films; phase constants; resonators; shunt inductors; superconductor kinetic inductance; Capacitors; Coplanar transmission lines; High temperature superconductors; Planar transmission lines; Shunt (electrical); Superconducting thin films; Superconducting transmission lines; Thin film inductors; Transmission line measurements; Wideband; Coplanar waveguides (CPWs); left-handed transmission lines (LH-TL); resonators; superconducting microwave devices;

fLanguage

English

Journal_Title

Applied Superconductivity, IEEE Transactions on

Publisher

ieee

ISSN

1051-8223

Type

jour

DOI

10.1109/TASC.2006.873992

Filename

1687908