Title :
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
fDate :
6/1/1996 12:00:00 AM
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;
Journal_Title :
Microwave Theory and Techniques, IEEE Transactions on
