Wang, Yi, Su, Hieng Tiong, Huang, Frederick and Lancaster, Michael J. (2007) Measurement of YBCO Thin Film Surface Resistance Using Coplanar Line Resonator Techniques From 20 MHz to 20 GHz. Applied Superconductivity, IEEE Transactions on, 17 (2). pp. 3632-3639. ISSN 1051-8223 (doi:10.1109/TASC.2007.899369)

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Abstract

The surface resistances of YBCO thin films are measured over a wide and continuous frequency range from 20 MHz to 20 GHz, by characterizing more than 1000 harmonics of two 20 MHz high-temperature superconductor resonators. One resonator is based on the conventional coplanar waveguide (CPW) and the other based on the conductor-backed CPW (CBCPW). The quality factors and resonant frequencies are measured. The attenuation and group-delays of the coplanar lines are estimated and surface resistances of the superconductors are extracted using a transmission-line model. The wideband frequency-dependence of the surface resistance is investigated. The sources of experimental errors are analyzed. This paper also reports some temperature-dependent and power-dependent measurement results.

Item Type:	Article
Additional Information:	[1] Journal has other title: IEEE Transactions on Applied Superconductivity. [2] Date of current version: 23 July 2007.
Uncontrolled Keywords:	coplanar transmission lines, high-temperature superconductors, microwave measurements, resonators
Subjects:	T Technology > TK Electrical engineering. Electronics Nuclear engineering
Pre-2014 Departments:	School of Engineering > Mobile & Wireless Communications Research Laboratory
Related URLs:	Publisher
Last Modified:	14 Oct 2016 09:24
URI:	http://gala.gre.ac.uk/id/eprint/9724

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