Title :
High speed microwave filter-limiter based on high-Tc superconducting films
Author :
Keis, V.N. ; Kozyrev, A.B. ; Samoilova, T.B. ; Vendik, Orest G.
Author_Institution :
Electr. Eng. Inst., St. Petersburg, Russia
fDate :
3/18/1993 12:00:00 AM
Abstract :
A new microwave (37 GHz) filter-limiter containing two switching YBCO high-Tc superconductive film elements is presented. Its operating principle is based on the fast film switching from the superconducting (S) state to the normal conducting (N) state under microwave pulses. The measured switching time ( tau S-N), limited by the measuring electronics, was shorter than 2*10-1 ns, with theoretical value tau S-N-2 ns. For small levels of microwave pulse power (P<5 W) insertion losses L were less than 0.2 dB, for P=100-400 W and L>or=18 dB.
Keywords :
electrical conductivity transitions; fin lines; high-temperature superconductors; microwave filters; microwave limiters; passive filters; solid-state microwave devices; superconducting devices; superconducting thin films; switching; waveguide components; 0.2 dB; 100 to 400 W; 18 dB; 2*10 -10 ns; 5 W; EHF; MM-wave type; MgO substrate; YBa 2Cu 3O 7-MgO; high-T c superconducting films; microwave filter-limiter; microwave pulses; millimetre wave operation; switching film elements; switching time;
Journal_Title :
Electronics Letters
DOI :
10.1049/el:19930364
