Mutual coupling reduction between two microstrip patch antennas by using the parasitic elements

Abstract

In this paper, the reduction of mutual coupling between two microstrip patch antennas is presented by implementing a novel parasitic structure. The measured results show that a 21 dB mutual coupling reduction was obtained in the bandwidth of 2.2% without affecting the radiation patterns obviously. This structure can be easily integrated into an adaptive antenna array to improve the null depth, or into a MIMO system to achieve a good isolation between antenna elements with the additional efforts on the mutual coupling reduction in E-plane.