00800naa#a2200205#i#450# EN\\bibl\52893 20241007011057.1 2587-9936 20191225b2019####ek#y0engy0150####ca RUS RU Low-noise tunable narrow bandpass filter designed based on combined use of discrete variable capacitor and discrete variable inductor Journal article Sevastopol Federal State Educational Institution of Higher Education Sevastopol State University 2019 7 с. Journal article local Радиотехника. Техника электромагнитных колебаний. 621.37 RUS Posnyi Oleg A Dolgushev Sergey V Posnaya Elena A rusjbpc.ru