Title :
A new HTS microwave filter using dual-mode multi-zigzag microstrip loop resonators
Author :
Zun Fu Jiang ; Hejazi, Z.M. ; Excell, P.S. ; Xu, Wei Yuan
Author_Institution :
Inst. of Electron., Acad. Sinica, Beijing, China
Abstract :
A new HTS planar microwave filter using dual-mode multi-zigzag square loop resonators is developed. A method for the accurate calculation of the coupling coefficient between two degenerate modes in a resonator is presented. The results of the full wave analysis of the 4-pole filters have shown that the filter has high performance, selectivity, and substantial size reduction. A 4-pole HTS bandpass filter with the bandwidth 1.36% at a central frequency 1.39 GHz is designed and fabricated and measured at 77 K. The agreement between theoretical and experiment results is good
Keywords :
band-pass filters; high-temperature superconductors; microstrip filters; microstrip resonators; microwave filters; resonator filters; superconducting filters; superconducting microwave devices; superconducting resonators; 1.39 GHz; 77 K; HTS planar microwave filter; coupling coefficient; degenerate mode; dual-mode multi-zigzag microstrip loop resonator; four-pole bandpass filter; full-wave analysis; Band pass filters; Bandwidth; Coupling circuits; High temperature superconductors; Microstrip filters; Microstrip resonators; Microwave filters; Narrowband; RLC circuits; Resonator filters;
Conference_Titel :
Microwave Conference, 1999 Asia Pacific
Print_ISBN :
0-7803-5761-2
DOI :
10.1109/APMC.1999.833717
