V.S. Gurov - Dr.Sc. (Eng.), Professor, Head of Department «Industrial Electronics», Rector of the Ryazan State Radio Engineering University. E-mail: gurov.v.s@rsreu.ru M.V. Dubkov - Ph.D. (Eng.), Associate Professor, Head of Department «General and Experimental Physics», Deputy Rector for Academic Work of the Ryazan State Radio Engineering University. E-mail: dubkov.m.v@rsreu.ru M.A. Burobin - Ph.D. (Eng.), Associate Professor, Deputy Head of Department «General and Experimental Physics», Ryazan State Radio Engineering University. E-mail: burobin.mikhail@yandex.ru A.V. Nikolaev - Senior Lecturer, Department «General and Experimental Physics», Ryazan State Radio Engineering University. E-mail: arniell@mail.ru