GHZ RANGE VEHICULAR RADARS

Abstract

Traffic accidents have become one of the most serious problems of global scale, for whose solution, a search for ways of improving the traffic safety is carried out. The basic principles of the use and implementation of radar sensors in transport technologies, types of the used radars and prospects of their use are investigated. In practice, a number of driver assistance systems, operating on the basis of radars are already used. So far, their functions have been aimed main- ly at improving the ease of driving, such as the adaptive speed maintenance, the hazard warn- ing system of a collision, the control system of "dead zones", the assistance when changing lanes, warning of objects moving in the transverse direction behind the vehicle, and assistance at parking. Undoubtedly, these systems, to a certain extent, improve the traffic safety, but the technical progress achievements now allow to introduce active safety systems such as the colli- sion mitigation system, and identify vulnerable trafficsections. To perform these essential safe- ty functions of driving, the systems should be able to better distinguish the objects on the road. It is known that to handle a large volume of information, it is required to have a wider band of frequencies. The currently known radars operate in a narrow frequency range 24 GHz or 76 GHz. Wide bandwidth and limitations by the high level of capacity will enhance the resolu- tion and distinguish the objects better. This is necessary for new features such as pedestrian detection and autonomous emergency braking in urban areas.