A 10 GHz thin film lumped element high temperature superconductor filter

Author

Swanson, D.G., Jr. ; Forse, R. ; Nilsson, B.J.L.

Author_Institution

Watkins-Johnson Co., Palo Alto, CA, USA

fYear

1992

fDate

1-5 June 1992

Firstpage

1191

Abstract

A narrowband thin-film lumped-element filter centered at 10 GHz has been fabricated using thalium-based high-temperature superconductor (HTS) technology. This filter does not suffer from the undesired spurious responses seen in thin-film distributed filters using HTS technology. The measured filter has 2.5-dB insertion loss at band center and 3% bandwidth and is within 50 MHz of the desired center frequency. Measurements were made to confirm the broad spurious free stopbands from 1 GHz to 21 GHz. Because this filter does not generate spurious modes in the substrate, it may be possible to put several filters on the same substrate in microwave systems applications.<>

Keywords

band-pass filters; high-temperature superconductors; lumped parameter networks; microwave filters; passive filters; superconducting devices; superconducting thin films; thin film circuits; 1 to 21 GHz; 10 GHz; 2.5 dB; SHF; Tl/sub 2/CaBa/sub 2/Cu/sub 2/O/sub 8/; high temperature superconductor; high-T/sub c/ superconductor film; lumped element; microwave systems; narrowband filter; thin film; Bandwidth; Frequency measurement; High temperature superconductors; Insertion loss; Loss measurement; Microwave filters; Narrowband; Substrates; Superconducting filters; Superconducting thin films;

fLanguage

English

Publisher

ieee

Conference_Titel

Microwave Symposium Digest, 1992., IEEE MTT-S International

Conference_Location

Albuquerque, NM, USA

ISSN

0149-645X

Print_ISBN

0-7803-0611-2

Type

conf

DOI

10.1109/MWSYM.1992.188211

Filename

188211