Optimal antenna positions on mobile terminal for 4×4 MIMO systems

The topic on practical implementation of MIMO systems for mobile communications gains a lot of attention, recently. Due to the area constraint on mobile terminal, the number of antennas is limited by antenna layout. The problem of how to design such a system in order to achieve the best benefit is still a huge challenge. In this paper, the attempt to realize the optimal antenna positions on mobile terminal for 4times4 MIMO systems is presented. The analysis is focused on the all possible positions of arranging four antennas on rectangular area. The spatial fading correlation and mutual coupling effects are the main considerations used for examining the maximum MIMO capacity obtained by optimal antenna positions. The simulation results indicate that the best capacity performance can be obtained when four antennas are located at four corners.