M.V. Davidovich – Dr.Sc.(Phys.-Math.), Professor,
Department of Radiotechnique and Electrodynamics, Saratov State University named after N.G. Chernyshevsky E-mail: davidovichmv@info.sgu.ru
A.I. Timofeev – Head of Departament,
LLC RPC «Etna Plus» (Saratov)
E-mail: info@etna.su
I.A. Kornev - Head of Research Group,
LLC RPC «Etna Plus» (Saratov)
E-mail: iak.etna@yandex.ru