A.P. Trifonov - Dr.Sc. (Eng.), Professor, Honored Scientist of RF, Head of Department of Radiophysics, Voronez State University; National Researcher University «МEI». E-mail: trifonov@phys.vsu.ru Yu.E. Korchagin - Dr.Sc. (Phys.-Math.), Associate Professor, Department of Radiophysics, Voronez State University; National Researcher University «МEI». E-mail: korchagin@phys.vsu.ru S.V. Korolkov - Post-graduate Student, Department of Radiophysics, Voronez State University. E-mail: sergeik1991@rambler.ru