1. University of Nottingham,George Green Institute for Electromagnetics Research, Faculty of Engineering,Nottingham,UK,NG7 2RD
2. RELS Limited,Wrocław,Poland,54-128
3. Warsaw University of Technology,Faculty of Electronics and Information Technology,Warszawa,Poland,00-665
4. University of Wroclaw,Institute of Experimental Physics,Wrocław,Poland,50-204
5. University of Leeds,School of Physics and Astronomy,Leeds,UK,LS2 9JT