Title :
High-temperature superconducting bandpass spiral filter
Author :
Ong, C.K. ; Chen, Linfeng ; Lu, Jian ; Tan, C.Y. ; Tan, B.T.G.
Author_Institution :
Dept. of Phys., Nat. Univ. of Singapore, Singapore
fDate :
10/1/1999 12:00:00 AM
Abstract :
We report a new type of microstrip bandpass spiral filter structure, which exhibits much smaller size than other existing miniaturized bandpass filter structures, and is particularly useful in developing high-temperature superconducting (HTS) compact filters for cellular communication systems. A prototype three-stage HTS bandpass spiral filter with center frequency of 633 MHz was designed and fabricated on a 20 mm×8 mm×0.5 mm LaAlO3 substrate. The measurement results of the spiral filter have good agreements with its electromagnetic full-wave simulation results
Keywords :
UHF filters; band-pass filters; high-temperature superconductors; microstrip filters; passive filters; resonator filters; superconducting filters; superconducting microwave devices; superconducting resonators; 633 MHz; HTS compact filters; LaAlO3; LaAlO3 substrate; YBCO thin film; YBaCuO-LaAlO3; bandpass spiral filter; cellular communication systems; dual spiral resonator; high-temperature superconducting filter; microstrip spiral filter; three-stage filter; Band pass filters; Capacitance; High temperature superconductors; Inductance; Microstrip filters; Microstrip resonators; Resonator filters; Spirals; Superconducting filters; Superconducting transmission lines;
Journal_Title :
Microwave and Guided Wave Letters, IEEE
