The bandwidth of microstrip antennas is usual small due the thickness of the substrate is very thin in terms of wavelengths. To enhance the bandwidth, a new design of rectangular microstrip patch antenna is presented. The proposed geometry consists of a rectangular shaped ground plane structure which has T-slot inside a U- slot loaded patch layer. The antenna is simulated using ADS, advanced design system software. A bandwidth of 44.64 % was a archived with return loss of -44dB.The resultant bandwidth of our antenna is compared with the results of non-slotted rectangular microstrip patch antenna