Title :
Accurate design of high Tc superconducting microstrip filter at UHF band for radio astronomy front end
Author :
Zhang, Guoyong ; Lancaster, Michael J. ; Huang, Frederick ; Zhu, Meihong ; Cao, Bisong
Author_Institution :
Univ. of Birmingham, UK
Abstract :
An eight-pole high temperature superconducting (HTS) microstrip bandpass filter with 1.3% bandwidth at 600 MHz UHF band for a radio astronomy front end is presented. Effective efforts have been made to eliminate the discrepancies between measured and computed responses in the design and packaging. The untuned measurement results of this filter at 30 K show a maximum insertion loss 0.22 dB, a minimum passband return loss 15 dB, and minimum out-of-band rejection 70 dB.
Keywords :
UHF filters; band-pass filters; barium compounds; high-temperature superconductors; microstrip filters; radioastronomy; superconducting filters; superconducting thin films; ytterbium compounds; 0.22 dB; 15 dB; 30 K; 600 MHz; 70 dB; UHF band; YBa2Cu3O7; band rejection; eight-pole high temperature superconducting microstrip bandpass filter; packaging; passband return loss; radioastronomy; untuned measurement; Band pass filters; Bandwidth; Extraterrestrial measurements; High temperature superconductors; Loss measurement; Microstrip filters; Packaging; Radio astronomy; Superconducting filters; UHF measurements;
Conference_Titel :
Microwave Symposium Digest, 2004 IEEE MTT-S International
Print_ISBN :
0-7803-8331-1
DOI :
10.1109/MWSYM.2004.1339181
