Title :
Influence of the surface gold thin film on HTS filter performance
Author :
Xinxiang, Lu ; Shichao, Jin ; Xiaoping, Zhang ; Bin, Wei ; Bisong, Cao
Author_Institution :
Tsinghua Univ., Beijing
Abstract :
A four-pole high temperature superconducting (HTS) filter was designed and fabricated to investigate the influence of gold (Au) thin film on the HTS filter performance, including the bandwidth, insertion loss and return loss. Due to the resistance of the Au, dissipative loss is an important issue. Simulation showed that the insertion loss was reduced with the Au film being gradually thinner. The experimental results of 0.2 dB insertion loss, -22 dB return loss were achieved and the bandwidth met the design need when the gold film was thinner than 90 nm. Furthermore, a thin Au layer is in favor of the stability for HTS material as well as for the HTS filter.
Keywords :
UHF filters; gold; high-temperature superconductors; metallic thin films; microstrip filters; microstrip lines; radiocommunication; superconducting filters; Au; HTS filter performance; HTS material stability; dissipative loss; four-pole high temperature superconducting filter; gain 22 dB; gold thin film surface; insertion loss; loss 0.2 dB; microstrip configuration; wireless communication system; Bandwidth; Gold; High temperature superconductors; Insertion loss; Performance loss; Stability; Superconducting filters; Superconducting thin films; Surface resistance; Transistors;
Conference_Titel :
Microwave and Millimeter Wave Technology, 2007. ICMMT '07. International Conference on
Conference_Location :
Builin
Print_ISBN :
1-4244-1049-5
Electronic_ISBN :
1-4244-1049-5
DOI :
10.1109/ICMMT.2007.381400
