A.G. Gudkov1, V.G. Tikhomirov2, S.V. Chizhikov3
1,3 Bauman Moscow State Technical University (Moscow, Russia)
2 St. Petersburg State Electrotechnical University «LETI» (St. Petersburg, Russia)
1 profgudkov@gmail.com; 2 vv11111@yandex.ru; 3 chigikov95@mail.ru