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

作　　者：XIA HouHai ZHOU ChunXia ZUO Tao HE Ming JI Lu ZHOU TieGe ZHAO XinJie FANG Lan YAN ShaoLin 

机构地区：[1]Deptartment of Electronics, Nankai University, Tianjin 300071, China

出　　处：《Chinese Science Bulletin》2009年第19期3596-3599,共4页

基　　金：Supported by the National Basic Progrom of China (Grant No. 2006CB601006);Hi-Tech Research & Development Program of China (Grant No. 2006AA12Z206);Specialized Research Fund for Doctoral Program of Higher Education in China (Grant No. 200800551009)

摘　　要：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 (Tl2Ba2CaCu2O8) 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.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.

关 键 词：HTS 低温物理学 进展 研究 发展 

分 类 号：O4[理学—物理]