A.V. Smirnov – Ph.D. (Phys.-Math), Senior Research Scientist, 

Kotel’nikov Institute of Radioengineering and Electronics of RAS (Moscow)

E-mail: andre-smirnov-v@yandex.ru

I.E. Kuznetsova – Dr.Sc. (Phys.-Math), Principal Research Scientist, 

Kotel’nikov Institute of Radioengineering and Electronics of RAS (Moscow)

E-mail: kuziren@yandex.ru