Design and reverberation chamber evaluation of enhanced UMTS multi-antenna systems for mobile phones: report of a COST284 scientific mission between the LEAT and Chalmers Institute
A. Diallo, P. Le Thuc, C. Luxey, R. Staraj, G. Kossiavas, M. Franzén, P.-S. Kildal
Several two and four neutralized UMTS antenna-elements positioned at the top edge of a small ground plane (PCB) for diversity and MIMO purposes have been designed and characterized at the LEAT of the University of Nice in terms of total efficiency and correlation coefficients from their scattering parameters. All these measurements, conducted with traditional equipments such as a VNA and a home-made Wheeler Cap, have proven that these structures had a strong potential for an efficient implementation of a diversity scheme at the mobile terminal side of a wireless link. However, the evaluation of the full diversity and MIMO performance of these prototypes requires some specific measurement tools and the associated expertise.
In April 2006, Aliou Diallo, PhD student from the LEAT of the University of Nice, went to Chalmers University of Technology for a one week COST284 scientific mission. The purpose of this mission was to share capabilities and competencies of both labs by characterizing all the designed prototypes in a rich scattering multi-path propagation environment obtained through a reverberation chamber set-up. This paper is a report of the work conducted during and after this stsm mission (publication in IEEE, IET journals and IEEE AP-S, EuCAP, IWAT, LAPC conferences). We especially focus on: