Analysis of the electromagnetic degrees of freedom in multi-antennas communications systems

The channel capacity enhancement is of great interest in broadband wireless communications. The spatial dimension is being investigated with the use of multi-antennas systems. The role of the antennas, their numbers and their positions are to be understood through an electromagnetic analysis. The degrees of freedom of an electromagnetic system are related to the capacity of a transmission channel. In this paper, we investigate all these notions through different case studies using full-wave electromagnetic simulations. The capacity of a multi-antennas system is thus being analyzed on a physical ground.