In this paper, the authors give a compact analysis and design of S-shaped microstrip patch antenna which is best suited for WiMAX application. The analysis and design is simulated over IE3D software Ver. 15.2. They have taken a definite ground plane of 50x70mm and patch size of 30x50mm. The substrate thickness is taken as 1.6mm and dielectric constant of 4.2 and loss tangent of 0.0013. The simulated result shows that the bandwidth is obtained in triple band- 7.79% at 0.262921GHz band, 13.45% at 1.53034GHz band and 28.0056% at 2.2382GHz band. The obtained gain is 3.96dBi at 2.33945GHz.