DGS based mutual coupling reduction between microstrip patch antenna arrays for WIMAX applications

This paper proposes a technique that is used to decrease the mutual coupling between microstrip patch antenna arrays. The proposed technique involves destructing the ground plane of microstrip patch antenna. Destructive ground structure (DGS) helps to absorb the waves which propagate through ground plane. These waves are known as surface waves. A major contribution of mutual coupling is given by these surface waves. DGS technique is one which reduces the interference of these waves with one other. This technique focuses on reduction of coupling for WIMAX applications at an operating frequency of 3.5 GHZ. This technique seems to be most effective to microstrip patch antennas. The proposed technique leads to the reduced mutual coupling to a greater extent and also results in a reduced antenna size.