D. A. Bukhtiyarov - Undergraduate Student, Department of Radio receivers and transmitters, Novosibirsk State Technical University. E-mail: ghostandfound@mail.ru A. P. Gorbachev - Dr.Sc. (Eng.), Professor, Department of Radio receivers and transmitters, Novosibirsk State Technical University. E-mail: apgor@ngs.ru A. V. Shvedova - Post-graduate Student, Department of Radio receivers and transmitters, Novosibirsk State Technical University. E-mail: annsh21@mail.ru