Title :
A tunable high temperature superconducting bandpass filter using semiconductor varactors
Author :
Chunguang Li ; Jia Wang ; Yongbo Bian ; Guoqiang Li ; Yun Wu ; Qiang Zhang ; Na Li ; Xu Wang ; Xueqiang Zhang ; Liang Sun ; Hong Li ; Yusheng He
Author_Institution :
Nat. Lab. for Supercond., Inst. of Phys., Beijing, China
Abstract :
A narrow band 4-pole varactor tuned high temperature superconducting (HTS) filter was design and fabricated. The center frequency of the filter can be tuned from 430 MHz to 720 MHz with a direct voltage up to 20V. The return loss is better than 10 dB in the whole tuning range. Insertion loss is in a range of 0.8~3.8 dB with 3dB fractional bandwidth about 3%.
Keywords :
UHF filters; active filters; band-pass filters; superconducting filters; varactors; HTS filter; four pole varactor; frequency 430 MHz to 720 MHz; high temperature superconducting band-pass filter; high temperature superconducting filter; narrow band varactor; semiconductor varactor; Band-pass filters; Couplings; Insertion loss; Loss measurement; Resonator filters; Superconducting filters; Varactors; HTS; tunable filter; varactor;
Conference_Titel :
Superconductive Electronics Conference (ISEC), 2013 IEEE 14th International
Conference_Location :
Cambridge, MA
Print_ISBN :
978-1-4673-6369-3
DOI :
10.1109/ISEC.2013.6604296
