Measurement of YBCO Surface Resistance Using Coplanar Line Resonator Techniques from 20 MHz to 20 GHz

Yi Wang; HT Su; Frederick Huang; Michael Lancaster

doi:10.1109/TASC.2007.899369

Measurement of YBCO Surface Resistance Using Coplanar Line Resonator Techniques from 20 MHz to 20 GHz

Yi Wang, HT Su, Frederick Huang, Michael Lancaster

Electronic, Electrical and Systems Engineering

Research output: Contribution to journal › Article › peer-review

11 Citations (Scopus)

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.

Original language	English
Pages (from-to)	3632-3639
Number of pages	8
Journal	IEEE Transactions on Applied Superconductivity
Volume	17
Issue number	2
DOIs	https://doi.org/10.1109/TASC.2007.899369
Publication status	Published - 1 Jun 2007

Keywords

resonators
high-temperature superconductors
coplanar transmission lines
microwave measurements

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10.1109/TASC.2007.899369

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title = "Measurement of YBCO Surface Resistance Using Coplanar Line Resonator Techniques from 20 MHz to 20 GHz",

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.",

keywords = "resonators, high-temperature superconductors, coplanar transmission lines, microwave measurements",

author = "Yi Wang and HT Su and Frederick Huang and Michael Lancaster",

year = "2007",

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doi = "10.1109/TASC.2007.899369",

language = "English",

volume = "17",

pages = "3632--3639",

journal = "IEEE Transactions on Applied Superconductivity",

publisher = "Institute of Electrical and Electronics Engineers (IEEE)",

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TY - JOUR

T1 - Measurement of YBCO Surface Resistance Using Coplanar Line Resonator Techniques from 20 MHz to 20 GHz

AU - Wang, Yi

AU - Su, HT

AU - Huang, Frederick

AU - Lancaster, Michael

PY - 2007/6/1

Y1 - 2007/6/1

N2 - 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.

AB - 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.

KW - resonators

KW - high-temperature superconductors

KW - coplanar transmission lines

KW - microwave measurements

U2 - 10.1109/TASC.2007.899369

DO - 10.1109/TASC.2007.899369

M3 - Article

VL - 17

SP - 3632

EP - 3639

JO - IEEE Transactions on Applied Superconductivity

JF - IEEE Transactions on Applied Superconductivity

IS - 2

ER -

Measurement of YBCO Surface Resistance Using Coplanar Line Resonator Techniques from 20 MHz to 20 GHz

Abstract

Keywords

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