J.N. Panasjuk - PhD, associate professor, assistant professor of a radio engineering, Tambov State Technical University. E-mail: pyunikol@rambler.ru A.P. Pudovkin - Dr.Sci.Tech., the professor managing chair of a radio engineering, Tambov State Technical University. E-mail: resbn@jesby.tstu.ru S.N. Danilov - Dr.Sci.Tech., associate professor, professor of a radio engineering, Tambov State Technical University. E-mail: plabz@mail.ru I.V. Knyazev - undergraduate of department of radio engineering, Tambov State Technical University. E-mail: knyazivan@mail.ru