Investigation on Mutual Coupling Suppression Using Polygon Structure of Microstrip Patch Antenna Array

In recent times, microstrip and patch antenna research has progressed rapidly. The challenges of design and meeting expectations of today's high speed communication have been overcome through advanced research in this field. However, the area of mutual coupling amongst large number of antennas in an array is yet to be explored at its fullest extent. This research paper is focused on a particular structure such as polygon to reduce the mutual coupling in an array of two microstrip patch antenna. Two microstrip patch antennas, located on common substrate in close proximity of each other are designed and simulated for the performance of the system. Next, the system is analyzed for mutual coupling. Through repeated design trials and measurement, the mutual coupling is reduced to about 2 dB. The other performance parameters of the system are estimated at -45 dB of return loss and 6 dBi of gain. The result is simulated and analyzed using advanced software tool.