# The UWB Radar Application in the Aviation Security Systems
## 5 Conclusions  
In our work, we present a new method for location of the person's movement behind the obstacle using the UWB radar, which we called the straight-line method. This method is fairly accurate and allows determining the position of the person behind the obstacle using UWB radars. It uses the intersections of the ellipses created by each radar set as well as combinations of the intersections of the ellipses created by using two radar sets. In principle, the presented method of lines is a combination of the method of direct calculation and calculation using the Bezout theorem. The measurement results show that the UWB radar can be used to locate people in the houses. Obviously, the use of a radar is limited by the thickness of the obstacle behind which the person is positioned. From the technical data of UWB systems, which are given in Section 2.1.1. of this work, it is clear that these systems use a very wide frequency band for operation. The width of this band exceeds several frequency bands in the very high frequency range. UWB systems have a small range in most cases. This feature is due to the fact that the transmission of a very broadband signal is characterized by high energy consumption. Obviously, if we use smaller transmission powers; thus, the reduced range corresponds to this. The advantage of using lower power in UWB systems is the suppression of artificial interference that these systems can cause. This fact limits the interference to other systems operating in the same frequency band. It is clear from the analysis that UWB systems can be used as communication devices. Due to the possibility of tracking people behind obstacles, UWB systems can be used in security applications and in the military. Due to their accuracy, UWB systems can be used in transport. Recently, research into the use of UWB systems has focused on their application in medicine in the diagnosis of oncological diseases. UWB systems are characterized by the high resolution of targets that are close to each other. They can measure distance very accurately. Due to the large width of the frequency band, they are very resistant to interference. Therefore, research in the field of synthesis of UWB systems is focused on the creation of new algorithms enabling the processing of their signals under interference conditions. Typical examples of such interference are reflections on ships, buildings, or the propagation of measurement signals through walls. The new method of determining the coordinates of the goal, which we present in our paper, allows us to determine the coordinates of the goal behind the obstacle with sufficient accuracy. Therefore, this method of processing UWB radar signals can be used in the security applications of UWB systems. Our further research in the field of UWB radar signal processing will be focused on determining the coordinates of targets using two transmitting sensors in interference conditions. The straight-line method was not verified for the accuracy of determining the position of the person behind the obstacle because the measured data were not synchronized with the exact position of the person during the measurement. Our contribution is the design of a new method of processing radar signals UWB, which allows us to monitor the movement of a person behind the obstacle. Although this method of processing UWB radar signals is not more accurate than the methods presented in the introduction of this work, we can use it in security applications, where we do not require high accuracy of determining the position of a person behind an obstacle but only his/her identification. The advantage of this method is its use for processing UWB radar signals in real time. The co-authors had together contributed to the completion of this article. Specifically, it follows their individual contribution: [PERSON] and [PERSON] equally contributed to writing original drafts, conceptualization, data collection and analysis, and methodology.