1. Department of Physics, Faculty of Arts and Sciences, Celal Bayar University, 45030 Manisa, Turkey
2. Gebze Institute of Technology, Department of Physics, No: 101, 41400 Cayirova Gebze, Turkey
3. Institute of Radiophysics and Electronics, NAS of Ukraine, 12 Ac. Proskura St., 61085 Kharkov, Ukraine
4. National Technical University, Kharkov Polytechnical Institute, Kharkov, Ukraine