O.V. Melnik1, V.A. Sablina2, N.V. Yakovlev3

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

1 omela111@yandex.ru, 2 sablina.v.a@evm.rsreu.ru, 3 nikgutendorf@gmail.com