A.A. Zabolotnykh - Post-graduate Student, Trainee Researcher, Kotelnikov IRE RAS (Moscow). E-mail: zabolotnyh_andre@mail.ru V.A. Volkov - Dr.Sc. (Phys.-Math.), Chief Research Scientist, Kotelnikov IRE RAS (Moscow)

A.A. Zabolotnykh - Interne Researcher, Kotelnikov Institute of Radio Engineering and Electronics of the RAS (Moscow) E-mail: zabolotnyh_andre@mail.ru V.A. Volkov - Dr.Sc. (Phys.-Math.), Chief Research Scientist, Kotelnikov Institute of Radio Engineering and Electronics of the RAS (Moscow)