K.V. Mashinsky – Junior Research Scientist,
Saratov Branch of Kotelnikov Institute of Radio Engineering and Electronics of RAS
E-mail: konstantin-m92@yandex.ru
V.V. Popov – Dr.Sc. (Phys.-Math.), Head of Laboratory,
Saratov Branch of Kotelnikov Institute of Radio Engineering and Electronics of RAS
D.V. Fateev – Ph.D. (Phys.-Math.), Senior Research Scientist,
Saratov Branch of Kotelnikov Institute of Radio Engineering and Electronics of RAS; Saratov State University