V.S. Gurov - Dr. Sc. (Eng.), Professor, Head of the Department of Industrial Electronics, Rector of Ryazan State Radio Engineering University. E-mail: gurovvs@mail.ru
P.I. Kuksa - Student, Department General and Experimental Physics, Ryazan State Radio Engineering University. E-mail: kuksa_p@mail.ru

V.S. Gurov - Dr.Sc. (Eng.), Professor, Head of the Department of Industrial Electronics, Rector, Ryazan State Radio Engineering University. E-mail: gurovvs@mail.ru A.A. Trubitsyun - Dr.Sc. (Phys.-Math.), Professor, Department of Industrial Electronics, Ryazan State Radio Engineering University. E-mail: assur@bk.ru P.I. Kuksa - Student, Department of General and Experimental Physics, Ryazan State Radio Engineering University. E-mail: kuksa_p@mail.ru