This paper aims to evaluate the contribution of micro-structured antennas in MIMO communication systems. This antenna technology is based on hybridization band gaps and presents at the same time a very small form factor and very low correlation coefficients. In order to evaluate this new type of antenna, a comparison of performance with patch antenna type was performed. Both prototypes were used in an indoor measurement campaign in a residential environment. An analysis of the MIMO matrix measurement has been carried out focusing on the MIMO gain capacity of the two types of antennas.