Robots and autonomous systems are an evolving industry for the military. Although the military's interest in autonomous systems has been existed for decades, the use and application of such systems in experiments and in on the ground operations is relatively new and growing. One of the basic functions of the autonomous unmanned ground vehicle (UGV) is "Follow me", where the UGV follows a person or another vehicle (object). The basic sensor used to determine the position of the UGV in relation to the object is the ultra-wideband sensor (UWB). UWB wireless technology consists of tag which is worn by person and anchors on the UGV and has high precision and transmission rate. It is of fundamental interest that the UGV follows exactly the path followed by the person. At the same time, the UGV has to avoid static and dynamic obstacles that are on the way. This paper presents the impact of dynamic and static obstacles, which can be found in real situations, between the UGV and the person. The results of measuring the angle and distance between the tag and the anchor using obstacles of different dimensions and in different positions are given. Also, different distances between tag and anchor were considered, in order to find the optimal distance.