Mutual Coupling Reduction for Linearly Arranged MIMO Antenna

Abstract

In the present paper, a new technique to reduce mutual coupling between linearly arranged patch antenna array is presented. Antennas are arrange in close space with edge-to-edge separation of 0.096λ and center-to-center spacing of 0.29λ, where λ is the free space wavelength. Two separate rectangular shape and T-shape parasitic elements are used to cancel the surface current (SC) in order to reduce mutual coupling. The parasitic elements are placed in between the antennas with an extension of the T-shape towards the boundary of patches. The obtained results indicate that mutual coupling for two consecutive antennas are less than -15 dB over the entire bandwidth.