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Recently, the development of advanced automotive technology for excellent safety and convenience has become more active. Efforts have focused on the development of active safety technology. Pre-Crash Systems, such as passenger protection systems activated before a collision or collision speed reduction system, which are categorized between active safety systems and passive safety systems, have been a subject of focus. In such systems, surround sensing technology to predict a collision is the key issue. We developed an electronically scanning millimeter-wave (MMW) RADAR, which uses Digital Beam Forming (DBF) technology, as one of the first in the world for automotive applications.