Angular measurements in azimuth and elevation with 77 GHz radar sensors

摘要

An antenna concept for direction of arrival estimation in azimuth and elevation is proposed for 77 GHz automotive radar sensors. This concept uses the amplitude information of the radar signal for the azimuth angle and the phase information for the elevation angle. The antenna consists of a combination of a series-fed-array structure with a cylindrical dielectric lens. This concept is implemented into a radar sensor based on SiGe MMICsfor validation. A two- and a four-beam configuration are presented and discussed with respect to angular accuracy and ambiguities.