V.I. Anisimkin – Dr.Sc.(Phys.-Math.), Main Research Scientist, Kotel'nikov IRE of RAS (Moscow) E-mail: anis@cplire.ru

N.V. Voronova – Kotel'nikov IRE of RAS (Moscow); Head of Laboratory, Elpa Corporation (Moscow) E-mail: vonavl@mail.ru

A.S. Kuznetsova – Ph.D.(Phys.-Math.), Research Scientist, Kotel'nikov IRE of RAS (Moscow)

V.A. Osipenko – Ph.D.(Phys.-Math.), Senior Research Scientist, Elpa Corporation (Moscow) E-mail: npk1elpa@mail.ru