Development of high-temperature superconducting filters operating at temperatures above 90 K

This paper represents the development of a high temperature superconducting （HTS） filter, the highest operating temperature of which is up to 93 K. The filter is designed for S band with 4% fractional bandwidth and fabricated using thallium-barium-calcium-copper oxide （TI2Ba2CaCu2O8） thin films. At...

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Bibliographic Details
Published in:Chinese science bulletin 2009-10, Vol.54 (19), p.3596-3599
Main Authors: Xia, HouHai, Zhou, ChunXia, Zuo, Tao, He, Ming, Ji, Lu, Zhou, TieGe, Zhao, XinJie, Fang, Lan, Yan, ShaoLin
Format: Article
Language:English
Subjects:
Articles/Automatic Control Technology
Chemistry/Food Science
Earth Sciences
Engineering
HTS
Humanities and Social Sciences
Life Sciences
multidisciplinary
Physics
Science
Science (multidisciplinary)
低温物理学
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Summary:This paper represents the development of a high temperature superconducting （HTS） filter, the highest operating temperature of which is up to 93 K. The filter is designed for S band with 4% fractional bandwidth and fabricated using thallium-barium-calcium-copper oxide （TI2Ba2CaCu2O8） thin films. At 93 K, the measurements of the filter show that the insertion loss in the passband is less than 0.22 dB, the return loss is better than 20 dB, and the out-of-band rejection is more than 80 dB. The analysis on the characteristics of the filter operating at different temperatures shows that the filter can work well at temperatures around 90 K. The temperature of 93 K is the highest among the previous reports for HTS filters. The result reported in this paper is significant for HTS filters to be used in the field of microwave communication requiring high sensitivity.
ISSN:1001-6538
2095-9273
1861-9541
2095-9281
DOI:10.1007/s11434-009-0347-4