This paper presents rectangular microstrip patch antenna for wireless applications. The proposed microstrip patch antenna has dual frequency band i.e. S and C. Moreover gain has obtained having range 3.41dBi to 7.93dBi. The antenna is fed by co-axial feed line technique and comprises of Roger RT/duroid 5870.To understand the characteristics of the proposed antenna the parametric study is to be performed. In addition, under the operating band good antenna characteristics observed like radiation pattern, gain and return loss. The proposed antenna is simulated and designed using HFSS.