O.V. Melnik1, S.I. Babaev2, M.N. Saraev3

1–3 FSBEI HE «Ryazan State Radio Engineering University named after V.F. Utkin» (Ryazan, Russia)

1 omela111@yandex.ru, 2 babaev.s.i@gmail.com, 3 mixailr@mail.ru