D.A. Usanov - Dr. Sc. (Phys.-Math.), Professor, Head of Department of Solid State Physics, Saratov State University named after N.G. Chernyshevsky, Academic of RANS, Honored Scientist of RF. E-mail: UsanovDA@info.sgu.ru A.V. Skripal - Dr. Sc. (Phys.-Math.), Professor, Department of Solid State Physics, Saratov State University named after N.G. Chernyshevsky. E-mail: Skripala_v@info.sgu.ru D.V. Ponomarev - Ph. D. (Phys.-Math.), Associate Professor, Department of Solid State Physics, Saratov State University named after N.G. Chernyshevsky. E-mail: Ponomarev87@mail.ru E.V. Latysheva - Post-graduate Student, Department of Solid State Physics, Saratov State University named after N.G. Chernyshevsky. E-mail: Ekatushka@list.ru

M.A. Medvedev – Engineer, NIKA-Microwave, Ltd (Saratov)

E-mail: medmixal@yahoo.com

I.G. Svechnikov – Ph.D.(Phys.-Math.), Research Scientist, NIKA-Microwave, Ltd (Saratov)

E-mail: svechnikovig@yandex.ru

E.A. Torgashov – Leading Engineer, NIKA-Microwave, Ltd (Saratov)

E-mail: eatorgashov@mail.ru

A.S. Oleynik – Dr.Sc.(Eng.), Professor, Department «Electronic Instruments and Devices», Yuri Gagarin State Technical University of Saratov

E-mail: anatoly.semenovich@gmail.com

N.A. Koplevatskii – Leading Engineer, NIKA-Microwave, Ltd (Saratov) E-mail: naumkopl@gmail.com