1. Microelectronics research unit, University of Oulu,Oulu,Finland
2. Centre for Wireless Communications, University of Oulu,Research Unit of Health Sciences and Technology
3. University of Oulu,Research Unit of Health Sciences and Technology,Oulu,Finland
4. Ericsson Antenna Technology, Germany GmbH
5. University of Oulu,Research unit of Medical Imaging, Physics and Technology, Optoelectronics and Measurement, Techniques Research Unit,Oulu,Finland