A.Yu. Parshin – Ph.D.(Eng.), Associate Professor, 

Department «Radio Engineering Devices», Ryazan State Radio Engineering University named after V.F. Utkin E-mail: parshin.a.y@rsreu.ru

Yu.N. Parshin – Dr.Sc.(Eng.), Professor, Head of Department «Radio Engineering Devices»,  Ryazan State Radio Engineering University named after V.F. Utkin E-mail: parshin.y.n@rsreu.ru