1. Dept. Radioelectronics, Faculty of Electrical Engineering and Communication, Lerch Laboratory of EM Research, Brno University of Technology, Technická 3082/12, Brno, The Czech Republic
2. UAq EMC Laboratory, University of L’Aquila, L’Aquila, Italy
3. Faculty of Electrical Engineering, Mathematics and Computer Science, Terahertz Sensing Group, Delft University of Technology, Delft, The Netherlands