In this paper, the authors present design of body phased array using optimized dual frequency patch antenna for C band focusing on 5 and 8GHz frequency band. Rat race coupler or hybrid coupler will work as a phase shifter. Simulation is done using IE3D for antenna and using Serenade for complete design for various parameters. Return loss of final design is -16.34dB for 5GHz frequency and VSWR (Voltage Standing Wave Ratio) of 1.37 and -15.49dB and VSWR of 1.43 for 8GHz frequency. Proposed antenna gives dual band operation and shows good bandwidth and simulated results for two frequency bands.