O.Ya. Usikov Institute for Radiophysics and Electronics of the National Academy of Sciences of Ukraine 12, Academician Proskura St., Kharkiv 61085, Ukraine
Hayakawa Institute of Seismo Electromagnetics Co. Ltd.(Hi-SEM), The University of Electro-Communications (UEC) Alliance Center #521, Advanced & Wireless and Communications Research Center, UEC, Chofu, Tokyo, 182-8585, Japan