Title :
Performance of hybrid HTS filter/GaAs low noise amplifier and microwave characterization of YBCO HTS resonators on R-plane sapphire
Author :
Toncich, S.S. ; Miranda, F.A. ; Bhasin, K.B. ; Kascak, T.J.
Author_Institution :
Bird Electronic Corporation, Solon, OH 44139, USA
Abstract :
Research efforts are underway at NASA-Lewis in High-Transition-Temperature-Superconductor (HTS) system level design and development as well as in new materials. For the first time, YBa2Cu3O7-¿ (YBCO) and Tl2Ba2CaCu2Ox (TBCCO) double-sided HTS filter/GaAs low noise amplifier (LNA) hybrid circuits have been realized. The HTS/GaAs hybrid circuit exhibited higher gain and lower noise figures than gold filter/GaAs LNA circuits. X-band microstrip linear resonators have been fabricated on YBCO HTS films on R-plane sapphire (R-A12O3). Linear resonators patterned on films with Yttria Stabilized Zirconia (YSZ) buffer layers performed poorly while the unloaded quality factor (Q0) of those patterned on films deposited on Cerium Oxide (CeO2) buffer layers were 50% higher than those of similar all-gold resonators at 77 K.
Keywords :
Buffer layers; Circuits; Gallium arsenide; High temperature superconductors; Low-noise amplifiers; Microwave amplifiers; Microwave filters; Resonator filters; System-level design; Yttrium barium copper oxide;
Conference_Titel :
Microwave Conference, 1993. 23rd European
Conference_Location :
Madrid, Spain
DOI :
10.1109/EUMA.1993.336835
