Title :
Microwave detectors based on granular high-T/sub c/ thin films
Author :
Konopka, J. ; Sobolewski, R. ; Jung, G. ; Kula, W. ; Konopka, A. ; Gierlowski, P. ; Lewandowski, J.
Author_Institution :
Inst. Fizyki PAN, Warszawa, Poland
Abstract :
The detection and mixing properties of microstrip superconducting YBCO and BCSCO granular thin-film structures were investigated. The microstrips were deposited on various substrates by two different techniques. Device performance was tested in 25-, 55-, and 110-GHz bands at temperatures ranging from 50 to 80 K. Detector response was bias and temperature dependent. The mixing experiments were performed in the 25-GHz frequency band. The intermediate frequency was varied from 50 MHz to 5 GHz without any decrease in the mixer output up to 3 GHz. YBCO and BCSCO thin-film devices are operational in the temperature range from Tc-10 K to about 50 K. The lower limit is imposed by quantum effects which render erratic the output signal.<>
Keywords :
barium compounds; bismuth compounds; calcium compounds; high-temperature superconductors; mixers (circuits); solid-state microwave devices; strip line components; strontium compounds; yttrium compounds; 10 to 50 K; 110 GHz; 25 GHz; 50 to 80 K; 55 GHz; Bi/sub 2/CaSr/sub 2/Cu/sub 2/O/sub 8/; YBa/sub 2/Cu/sub 3/O/sub 7/; granular thin-film structures; high temperature superconductors; intermediate frequency; microstrip; microwave detectors; mixer output; mixing properties; quantum effects; Detectors; Frequency; Granular superconductors; Microstrip; Substrates; Superconducting microwave devices; Superconducting thin films; Temperature dependence; Temperature distribution; Yttrium barium copper oxide;
Conference_Titel :
Microwave Symposium Digest, 1989., IEEE MTT-S International
Conference_Location :
Long Beach, CA, USA
DOI :
10.1109/MWSYM.1989.38806
