Reduction of mutual coupling by desegregated with EBG structure for microstrip antenna array radar applications

The development and the employment of methods to reduce the mutual coupling between the elements of a array antennas is become a hot topic in the design of array antennas. The use of electromagnetic band-gap (EBG) structures is a good way to reduce the excitation of surface waves in geometries of printed antenna in order to alleviate the problem of mutual coupling. This paper examines the performance of a microstrip antenna integrated phased array in an EBG. A novel EBG array configuration is proposed, the bandgap characteristic of mushroom-like EBG has been studied, its spacing of characteristic band of the deletion of the surface wave is demonstrated by plotting the variations of the transmission coefficient S₁₂ with the frequency and scatter diagram. The design of the antenna is verified by High Frequency Structural Simulator (HFSS), the simulation HFSS results show that the design approach EBG is a good candidate for a reduction of mutual coupling to certain frequencies between elements of the radiator, which in turn increases the directivity of the antenna.