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This paper presents the design of 4X1 and 4X2 microstrip array antenna structures for 10GHz applications. The antennas with inset feed structures and micro strip line corporate feeding network is developed and simulated using Advanced Design System (ADS) software. Both the schemes provide better gain, i.e. 12.56dBi and 13.89dBi. However, the 4X2 inset feed antenna shows a 1.3dB improvement in the gain and 50MHz improvement in 10dB bandwidth characteristics, when compared to the 4X1 case.