HTS filter subsystem for future mobile communication system

作     者：ZUO Tao FANG Lan ZHAO XinJie ZUO Xu ZHOU TieGe YAN ShaoLin 

作者机构：China Electronics Technology Group Corporation No. 16 Research Institute Hefei 230043 China Department of Electronics Nankai University Tianjin 300071 China 

出 版 物：《Science in China(Series F)》 (中国科学（F辑英文版）)

年 卷 期：2008年第51卷第9期

页      面：1384-1390页

核心收录：

学科分类：080904[工学-电磁场与微波技术] 0810[工学-信息与通信工程] 0809[工学-电子科学与技术（可授工学、理学学位）] 08[工学] 080402[工学-测试计量技术及仪器] 0804[工学-仪器科学与技术] 081001[工学-通信与信息系统] 

基　　金：Supported by the Major State Basic Research Development Program of China (973 Program) (Grant No. 2006CB601006) the National High Technology Research and Development Program of China (863 Program) (Grant No. 2006AA03Z213) 

主　　题：HTS filter self-equalization subsystem group delay 

摘      要：A high-temperature superconducting （HTS） filter subsystem consisting of a 10-pole HTS filter with group delay self-equalization, a cryogenic low noise amplifier （LNA）, and a cooling device is presented in this paper. The HTS filter has a 0.51% fractional bandwidth at 1955 MHz, simulated in Sonnet, and is fabricated using double-sided TI2Ba2CaCu208 films on 0.5 mm thick LaAIO3 substrate. Measured responses show that the minimum insertion loss of the filter is 0.16 dB, and the out-of-band rejection is better than 75 dB. The slope is 27 dB MHz^-1 at the low band edge and 22 dB MHz-1 at the upper band edge. The HTS filter subsystem has a gain of 19.3 dB and a noise figure （NF） of 0.8 dB. Furthermore, the phase distortion of HTS filters is considered, and an efficient design approach for self-equalized HTS filters is proposed.