P.V. Yakshankin - Post-graduate Student of Ulyanovsk State Technical University. E-mail: yakspavel@yandex.ru
I.V. Voronov - Post-graduate Student of Ulyanovsk State Technical University. E-mail: ilvo1987@gmail.com

P.V. Smirnov - Post-graduate Student, Ulyanovsk State Technical University A.G. Tashlinskii - Dr. Sc. (Eng.), Professor, Head of Department «Radio Engineering», Ulyanovsk State Technical University