In this paper, we have developed a microwave imaging experimental set up using a 1-D beamforming algorithm for the detection of buried object using UWB antenna operating at 1-11 GHz, and done the experimental validation. The experiment consists of a mechanical scanner with 3.6mm resolution in the X and Y directions, UWB horn antenna which sweeps over the frequency range. The antenna transmits the microwave signal and receives the backscatters from all the objects. These backscatters are passed through the 1-D bean former designed to image the backscatter energy as a function of location. Object of size 4mm embedded in the sand bath has been detected using the developed microwave imaging set up.