G.I. Nechaev, O.V. Melnik, A.A. Mikheev

V.A. Volkov, D.N. Travkin

V.V. Afanasyev - Dr.Sc. (Eng.), Professor, Department of «Radioelectronic and Quantum Devices» Kazan National Research Technical University named after A.N. Tupolev (KNRTU-KAI). E-mail: nsdx@yandex.ru E.R. Mardanshin - Post-graduate Student, Department of «Radioelectronic and Quantum Devices» Kazan National Research Technical University named after A.N. Tupolev (KNRTU-KAI). E-mail: m.emil89@mail.ru