S.N. Kirillov - Dr. Sc. (Eng.), Professor, Ryazan State Radio Engineering University. E-mail: kirillov.lab@gmail.com P.S. Pokrovsky - Ph. D. (Eng.), Associate Professor, Ryazan State Radio Engineering University. E-mail: paulps@list.ru A.A. Lisnichuk - Post-graduate Student, Engineer, Ryazan State Radio Engineering University. E-mail: a.a.lisnichuk@gmail.com