[1] Brno Univ Technol, Dept Radioelect, Lerch Lab EM Res, FEEC, Brno 61600, Czech Republic
[2] Lulea Univ Technol, Dept Comp Sci Elect & Space Engn, S-97187 Lulea, Sweden
[3] Univ Aquila, Dept Ind & Informat Engn & Econ, UAq EMC Lab, I-67100 Laquila, Italy