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Characteristics of a double sheet that utilizes dual frequency of S-Shaped micro-strip patch antenna FDTD techniques are conveniently used to attain acceptable impedance, depending on the design parameters and technical analysis. Using FDTD techniques, the dielectric constant and substrate height for different antenna parameters were tested. The FDTD approach is used to evaluate the recommended structure on the basis of a differentiation between numerical and experimental testing. The FDTD allows it possible to research and construct the suggested three-dimensional microstrip antenna, and to evaluate related parameters such as gain, VSWR and radiation pattern.