Title :
Superconducting frequency tunable SAW filter and dispersion line
Author :
Baum, H.-P. ; Sarma, B.K. ; Levy, M.
Author_Institution :
Dept. of Phys., Wisconsin Univ., Milwaukee, WI, USA
Abstract :
It is shown that the superconducting transition of a thin film with a high sheet resistivity can change the attenuation of surface acoustic waves (SAW) by as much as 30 dB/cm at 700 MHz. Preliminary experimental results are presented for an NbN superconducting film. It is suggested that the observed effect could be used to produce variable-bandwidth SAW filters, reflective array compressor dispersion lines, and switches in SAW delay lines.<>
Keywords :
niobium compounds; passive filters; superconducting junction devices; surface acoustic wave devices; NbN; attenuation; delay lines; dispersion line; frequency tunable SAW filter; reflective array compressor dispersion lines; sheet resistivity; superconducting transition; surface acoustic waves; switches; variable-bandwidth SAW filters; Acoustic waves; Attenuation; Conductivity; Dispersion; Frequency; SAW filters; Superconducting films; Superconducting filters; Superconducting thin films; Surface acoustic waves;
Conference_Titel :
Microwave Symposium Digest, 1989., IEEE MTT-S International
Conference_Location :
Long Beach, CA, USA
DOI :
10.1109/MWSYM.1989.38807
