1. Department of Microelectronics, Brno University of Technology, Brno, Czech Republic
2. Department of Telecommunications Engineering, School of Engineering, King Mongkut’s Institute of Technology Ladkrabang, Bangkok, Thailand
3. Department of Electrical Engineering, Czȩstochowa University of Technology, Czȩstochowa, Poland
4. Institute of Electronics and Photonics, Faculty of Electrical Engineering and Information Technology, Slovak University of Technology in Bratislava, Bratislava, Slovakia
5. Physics Department, Electronics Laboratory, University of Patras, Patras, Greece