High-power HTS planar filters with novel back-side coupling

Author

Shen, Zhi-Yuan ; Wilker, Charles ; Pang, Philip ; Carter, Charles, III

Author_Institution

Du Pont, Wilmington, DE, USA

Volume

44

Issue

6

fYear

1996

fDate

6/1/1996 12:00:00 AM

Firstpage

984

Lastpage

986

Abstract

Novel back-side coupling was used to produce high-power high temperature superconducting (HTS) filters. Several 2.88 GHz, 0.7% equal-ripple bandwidth, 2-pole TE₀₁ mode filters were fabricated using Tl₂Ba₂CaCu₂O₈ HTS thin films on 20-mil LaAlO₃ substrates. The calibrated, measured performance of the filter at 77 K was <0.1 dB in-band insertion loss and 0.2 dB ripple up to 8 W. The uncalibrated measured performance of the filter was unchanged up to 21 W. This represents a significant advance in the power handling of planar HTS filters. These high-power, high-performance, compact HTS filters were designed to be used in transmitters for satellite communications

Keywords

UHF filters; barium compounds; calcium compounds; high-temperature superconductors; microwave filters; passive filters; superconducting microwave devices; superconducting thin films; thallium compounds; 0.1 dB; 2.88 GHz; 77 K; 8 to 21 W; HTS thin films; HTSC; LaAlO₃; LaAlO₃ substrates; TE₀₁ mode filters; Tl₂Ba₂CaCu₂O₈; TlBaCaCuO; back-side coupling; high temperature superconducting filters; high-power HTS planar filters; satellite communications; transmitters; Bandwidth; High temperature superconductors; Insertion loss; Loss measurement; Performance loss; Power measurement; Superconducting filters; Superconducting thin films; Tellurium; Transmitters;

fLanguage

English

Journal_Title

Microwave Theory and Techniques, IEEE Transactions on

Publisher

ieee

ISSN

0018-9480

Type

jour

DOI

10.1109/22.506642

Filename

506642