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A novel customized &#x03C0;-shaped split-ring resonator metasurface arranged in two configurations is presented to decouple 1&#x00D7;2 and 1&#x00D7;4 Millimeter-Wave (MMW) Magneto-Electric (ME) Dipole in the H-Plane with 1.6 mm (0.32&#x03BB; at 60 GHz) inter-element spacing. The metamaterial unit cell is first designed to inhibit the propagation of coupled surface waves within the bandwidth of interest. A 5&#x00D7;2 arrangement of this unit cell is carefully positioned on the top and bottom of the superstrate with 1 mm spacing (0.2&#x03BB; at 60 GHz) between the antenna and the superstrate. In the 1&#x00D7;2 array, a maximum measured mutual coupling reduction of 53 dB is observed within the 52-66 GHz bandwidth (23.7%). To further demonstrate the uniqueness of the metasurface, an 11&#x00D7;2 configuration of this unit cell is arranged as a superstrate for the 1&#x00D7;4 ME-dipoles. A maximum measured mutual coupling reduction of 40 dB is achieved without a considerable effect on the radiation characteristics. Parametric analysis is performed to confirm the uniqueness of this new decoupling structure. The proposed antenna exhibits measured high total efficiency (&#x003E; 89%), high gain (&#x003E; 8 dB), low envelope correlation coefficient (&#x003C;0.0003), and very good radiation characteristics throughout the entire bandwidth. The fabricated prototype antenna is measured to validate the simulation results. The proposed antenna is a good recommendation for V-band millimeter-wave MIMO applications like radar research.

Millimeter-wave ME-Dipole Array Antenna Decoupling Using a Novel Metasurface Structure