O.E. Glukhova – Dr.Sc.(Phys.-Math.), Professor, Head of the Department of Radiotechnique and Electrodynamics,  Saratov State University named after N.G. Chernyshevsky 

E-mail: GlukhovaOE@info.sgu.ru

D.A. Kolosov – Post-graduate Student, 

Department of Radiotechnique and Electrodynamics, Saratov State University named after N.G. Chernyshevsky  E-mail: demkol.93@mail.ru

M.M. Slepchenkov – Ph.D.(Phys.-Math.), Associate Professor, 

Department of Radiotechnique and Electrodynamics, Saratov State University named after N.G. Chernyshevsky  E-mail: slepchenkovm@mail.ru