V.V. Antonov - Ph.D. (Phys.-Math.), Associate Professor, Department "Radioelectronics and Telecommunications", Saratov State Technical University named after Gagarin Yu.A. E mail: Antonov 1946@mail.ru
A.A. Dimitryuk - Dr.Sc. (Eng.), Professor, Department "Radioelectronics and Telecommunications", Saratov State Technical University named after Gagarin Yu.A. E-mail: sansand@mail.ru