R.A. Torgashov – Research Trainee, 

Saratov Branch of Kotelnikov Institute of Radio Engineering and Electronics;

Post-graduate student, Saratov State University n.a. N.G. Chernyshevskii

E-mail: torgashovra@gmail.com

G.V. Torgashov – Ph.D. (Phys.-Math.), Leading Research Scientist, 

Saratov Branch of Kotelnikov Institute of Radio Engineering and Electronics 

N.M. Ryskin – Dr.Sc. (Phys.-Math.), Professor, Head of Laboratory, 

Saratov Branch of Kotelnikov Institute of Radio Engineering and Electronics

A.G. Rozhnev – Ph.D. (Phys.-Math.), Senior Research Scientist, 

Saratov Branch of Kotelnikov Institute of Radio Engineering and Electronics