1. Mathematical Physics Department, O. Usikov Institute for Radiophysics and Electronics of National Academy of Sciences of Ukraine, Kharkiv, Ukraine
2. Département Micro-Ondes, Lab-STICC/Telecom Bretagne, Technopôle Brest-Iroise, Brest Cedex 3, France
3. Radiophysics and Electronics Department, L. Gumilyov Eurasian National University, Astana, Kazakhstan