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Telecommunications and Radio Engineering
SJR: 0.202 SNIP: 0.2 CiteScore™: 0.23

ISSN Imprimir: 0040-2508
ISSN On-line: 1943-6009

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Telecommunications and Radio Engineering

DOI: 10.1615/TelecomRadEng.v57.i12.40
6 pages

Investigation of HTS Microstrip Bandpass Filters for Extreme Working Conditions

I. V. Korotash
Institute for Metal Physics, National Academy of Sciences of the Ukraine, Kyiv-03142, Ukraine
M. Lorenz
institute for Experimental Physics II, University of Leipzig, D-04103, Germany
E.M. Rudenko
Institute for Metal Physics, National Academy of Sciences of the Ukraine, Kyiv-03142, Ukraine
T.V. Stepanova
Physics Technology Institute of Metals and Alloys, Kyiv-03142, Ukraine

RESUMO

The microstrip bandpass filter based on YBCO thin films for 1.7 GHz with low insertion loss, passband-width about 3 % and high steepness has been developed, manufactured and tested. The technology for an encapsulated housing of filter, which should be cyclical cooled down to the liquid nitrogen temperature has been developed. The filter has been designed and manufactured from double-sided YBCO film on sapphire substrate with CeO2 buffer sublayer. The characteristics of the designed HTS bandpass filter in a housing were stables after 5 cycles of rapid cooling and heating (300 K ↓ 77 K ↑ 300 K) and more than a year of usage. The degradation of characteristics of the unhermetized filters under effect of moisture and at a storage in the atmosphere is explored.


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