Compact Radiator-Shared MIMO Array of Port and Radiation-Pattern Decoupling Magnetoelectric Dipoles

This paper presents a port-decoupled and radiation-pattern-decoupled (RPD) technique for designs of multiple-input multiple-output (MIMO) magnetoelectric-dipole (ME-dipole) arrays. The ME-dipole elements share the patches with each other to obtain a compact design, with the element spacing given by 0.43 λ0. In general, each array element has excited and coupled ME-dipole modes. The proposed design suppresses the coupled ME-dipole mode, leaving only the excited ME-dipole mode. As a result, the RPD characteristics can be obtained for each array element. For demonstration, two 1×3 and one 2×2 MIMO arrays operating in the 10-GHz band are designed, fabricated, and measured. Measured results show that the overlapping -10 dB impedance bandwidth of the elements covers a new 6G frequency range from 10.0 GHz to 10.5 GHz (4.9% bandwidth). Reasonable agreement between the measured and simulated results is observed.