Adjustable multilayer HTS filters

Author

Chen, Kouth ; Chen, Ming-Jye ; Chen, Jau-Han ; Yang, Hong-Chang ; Wang, Li-Min ; Huang, Chao-Yuan ; Wang, Bert

Author_Institution

Adv. Technol. Co. Ltd., Taipei, Taiwan

Volume

11

Issue

2

fYear

2001

fDate

6/1/2001 12:00:00 AM

Firstpage

4010

Lastpage

4013

Abstract

An adjustable multilayer high-temperature superconductor (HTS) bandpass filter has been fabricated. Taped comb-line filters with multilayer structures were designed, YBa₂Cu₃O_7-δ (YBCO) thin films deposited on LaAlO₃ were used to construct the packaged multilayer HTS filter. The electrical length of the resonators in the filter was smaller than a quarter-wave length. The frequency responses of the filter were measured at liquid nitrogen temperature 77 K. The insertion loss of the packaged filter was determined to be less than 0.5 dB. By mechanically adjusting the multilayer structure, the center frequencies of the filter changed from 1.78 to 1.92 GHz, and the variations of the bandwidth from 60 to 150 MHz were also obtained

Keywords

UHF filters; band-pass filters; barium compounds; comb filters; frequency response; high-temperature superconductors; losses; superconducting filters; superconducting thin films; yttrium compounds; 1.78 to 1.92 GHz; 60 to 150 MHz; 77 K; LaAlO₃; YBa₂Cu₃O_7-δ; YBa₂Cu₃O₇-LaAlO₃; bandpass filter; bandwidth variations; center frequencies; frequency responses; insertion loss; multilayer HTS filters; resonator electrical length; taped comb-line filters; Band pass filters; Frequency; High temperature superconductors; Nonhomogeneous media; Packaging; Resonator filters; Sputtering; Superconducting filters; Superconducting thin films; Yttrium barium copper oxide;

fLanguage

English

Journal_Title

Applied Superconductivity, IEEE Transactions on

Publisher

ieee

ISSN

1051-8223

Type

jour

DOI

10.1109/77.947376

Filename

947376