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

Volume

9

Issue

10

fYear

1999

fDate

10/1/1999 12:00:00 AM

Firstpage

407

Lastpage

409

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;

fLanguage

English

Journal_Title

Microwave and Guided Wave Letters, IEEE

Publisher

ieee

ISSN

1051-8207

Type

jour

DOI

10.1109/75.798031

Filename

798031