“…This is due to the fact that doing so would enhance the mutual coupling and result in high correlation coefficients [10]- [12]. These antennas, which may be implemented using a variety of techniques [13]- [17], even if they are closely spaced, need to be capable of receiving signals independently, and the signals that are received need to be uncorrelated in order to attain a high capacity [18], [19]. Therefore, in order to get a higher MIMO channel capacity, it is necessary to have both adequate isolation between the antennas and appropriate radiation patterns.…”