M.A. Abelmas1, O.V. Ivanov2

1 Ulyanovsk State Technical University (Ulyanovsk, Russia)

2 Ulyanovsk Branch of the V.A. Kotelnikov Institute of Radio Engineering and Electronics of the RAS (Ulyanovsk, Russia)

1 abelmax1998@mail.ru; 2 olegivvit@yandex.ru