O.E. Glukhova − Dr.Sc. (Phys.-Math.), Professor, 

Head of Department of Radiotechnique and Electro-dynamics, 

Saratov National Research State University named after N. G. Chernyshevsky

E-mail: glukhovaoe@info.sgu.ru 

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

Department of Radiotechnique and Electrodynamics, 

Saratov National Research State University named after N. G. Chernyshevsky 

E-mail: slepchenkovm@mail.ru

D.A. Kolosov − Post-graduate Student, Junior Research Scientist, 

Department of Radiotechnique and Electrodynamics,

Saratov National Research State University named after N. G. Chernyshevsky E-mail: demkol.93@mail.ru