Mutual coupling reduction in dielectric resonator MIMO antenna arrays using metasurface orthogonalize wall

An effective technique for reducing the mutual coupling between mm-wave dielectric resonator antennas (DRA) using a novel metasurface is investigated and presented. This is achieved by embedding a metasurface wall between the two DRAs, which are placed in H-Plane. Using the proposed metasurface, the TE modes of the antenna become orthogonal which reduces the mutual coupling between the two DRAs. The proposed metasurface wall is composed of 5×4 unit cells along the E-Plane. The mutual coupling is reduced between 4 to 20 dB when the proposed metasurface wall is placed between the antennas. Moreover, the proposed metasurface wall does not have significant impact on the antenna radiation pattern.