A novel Microstrip patch antenna with hash shaped slotted ground plane slotted patch is presented. Hash shaped slot in ground plane provides the multiple resonances. Proposed antenna provides wide bandwidth and reduced return loss. In this paper, large bandwidth is achieved by introducing slots in ground plane and conducting patch. Designed antenna cover the WLAN 5.2GHz (5.15-5.35GHz) band. Performance parameters return loss, bandwidth, gain, directivity, and Voltage Standing Wave Ratio (VSWR) have been analyzed for simple rectangular patch antenna and for proposed multiband Microstrip patch antenna by using finite element method based High Frequency Structure Simulator software (HFSS).