V.S. Vedeneev - Lecturer, Department of Radio Physics and Electronics, Chelyabinsk State University E-mail: ingafen@gmail.com I.V. Bychkov - Dr.Sc. (Phys.-Math.), Professor, Head of the Department of Radio Physics and Electronics, Chelyabinsk State University E-mail: bychkov@csu.ru)

E.N. Gorlacheva¹, N.P. Goncharova²

1,2 Bauman Moscow State Technical University (Moscow, Russia), 

  1 gorlacheva@yandex.ru, 2 nataly.gonn79@gmail.com