V.S. Gurov - Dr. Sc. (Eng.), Professor, Department «Industrial Electronics», Rector of Ryazan State Radio Engineering University. E-mail: gurovvs@mail.ru
M.V. Dubkov - Ph. D. (Eng.), Associate Professor, Head of Department of General and Experimental Physics, Pro-rector, Ryazan State Radio Engineering University. E-mail: dubkov.m.v@mail.ru
A.V. Nikolaev - Senior Lecturer, Department of General and Experimental Physics,
Ryazan State Radio Engineering University. E-mail: arniell@mail.ru
