Abstract-Antenna foorprint is an important parameter for good detection result in ground penetrating radar (GPR) surveys and applications. the various condition of soil under which a target is buried may change the footprint of an antenna. an antenna with a capability to adapt with different soil condition is therefore needed. this type of antenna is capable to adjust the footprint due to the problem of variying soil condition. the footprint of an antenna is related to the antenna dimension. in this paper, an UWB array antenna of 5-element for footprint adjusment was investigated and implemented using FR4 substrate materials. the antenna of five UWB elements with different dimension proposed to provide different footprint areas and the resistive loading applied at each end of all antenna element to reduce coupling between antenna element. numerical simulation was conducted and measurements were carried out to validate the result. simulation and measurement show that the footprint of the proposed antenna is directly propotional to the antenna dimension.