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

E-mail: GlukhovaOE@info.sgu.ru

D.S. Shmygin – Assistant, 

Department of Radiotechnique and Electrodynamics, Saratov State University named after N.G. Chernyshevsky

E-mail: shmygin.dmitriy@gmail.com

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