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NbN hot electron superconducting mixers for 100 GHz operation
Gol'tsman, G. N., Karasik, B. S., Okunev, O. V., Dzardanov, A. L., Gershenzon, E. M., Ekstrom, H., et al. (1995). NbN hot electron superconducting mixers for 100 GHz operation. IEEE Trans. Appl. Supercond., 5(2), 3065–3068.
NbN is a promising superconducting material for hot-electron superconducting mixers with an IF bandwidth larger than 1 GHz. In the 1OO GHz frequency range, the following parameters were obtained for 50 /spl Aring/ thick NbN films at 4.2 K: receiver noise temperature (DSB) /spl sim/1000 K; conversion loss /spl sim/10 dB; IF bandwidth /spl sim/1 GHz; and local oscillator power /spl sim/1 /spl mu/W. An increase of the critical current of the NbN film, increased working temperature, and a better mixer matching may allow a broader IF bandwidth up to 2 GHz, reduced conversion losses down to 3-5 dB and a receiver noise temperature (DSB) down to 200-300 K.
NbN hot electron superconducting mixers for 100 GHz operationGol'tsman, G.N.Karasik, B.S.Okunev, O.V.Dzardanov, A.L.Gershenzon, E.M.Ekstrom, H.Jacobsson, S.Kollberg, E.info:doi/10.1109/77.403239openurl:?ctx_ver=Z39.88-2004&rfr_id=info%3Asid%2Fhttps%3A%2F%2Fdb.rplab.ru%2Frefbase%2F&genre=article&atitle=NbN%20hot%20electron%20superconducting%20mixers%20for%20100%20GHz%20operation&title=IEEE%20Trans.%20Appl.%20Supercond.&stitle=IEEE%20Trans.%20Appl.%20Supercond.&issn=1051-8223&date=1995&volume=5&issue=2&spage=3065&epage=3068&aulast=Gol%27tsman&aufirst=G.%20N.&au=Karasik%2C%20B.%20S.&au=Okunev%2C%20O.%20V.&au=Dzardanov%2C%20A.%20L.&au=Gershenzon%2C%20E.%20M.&au=Ekstrom%2C%20H.&au=Jacobsson%2C%20S.&au=Kollberg%2C%20E.&id=info%3Adoi%2F10.1109%2F77.403239&sid=refbase%3ARpLabcitekey:Goltsman_etal1995Gol'tsman, G. N., Karasik, B. S., Okunev, O. V., Dzardanov, A. L., Gershenzon, E. M., Ekstrom, H., et al. (1995). NbN hot electron superconducting mixers for 100 GHz operation. IEEE Trans. Appl. Supercond., 5(2), 3065-3068.1995JournalArticletextNbN HEB mixersurl:http://ieeexplore.ieee.org/document/403239/1051-8223IEEE Trans. Appl. Supercond.19955230653068