A.A. Skvortsov - Ph. D. (Eng.), Associate Professor, Department «Electronics and Telecommunications», Yuri Gagarin State Technical University (Saratov). E-mail: sotrudniki.1@yandex.ru E.A. Torgashev - Engineer, NIKA-Microwave, Ltd (Saratov), Post-graduate Student, Department «Radioengineering and Electrodynamics», Saratov State University named after N.G. Chernyshevsky. E-mail: eatorgashov@mail.ru