High gain linear polarization microstrip antenna with four element electromagnetically coupled patch

A high gain linear polarization antenna with four element electromagnetically coupled patch is presented in this paper. This antenna may be used to limited scan phased array. Two-layer patch is employed to broad impedance band and feeding network with exponential taper line transformer and coax to microstrip transition power divider is employed. Single element of electromagnetically coupled patch compared with array antenna with four elements. Finally, the effect of two types EBG of hole etched ground and SRR DGS to antenna property is studied.