A highly modular 77 GHz multi-tone FMCW SiGe radar concept for industrial measurements

In this paper, a modular system for 77 GHz applications and a novel approach to increase the accuracy of distance measurements using angular phase shifts is presented. The sensor itself consists of state of the art MMICs and provides the opportunity to exchange the beam forming component easily. The radiation characteristics of the so far developed beam formers are illustrated and some exemplary distance measurements will be shown. The sensor prototype is integrated in a robust metal case, which is usable for measurements in harsh environments. Applications for the sensor include distance, velocity as well as surface and vibration analysis. The introduced distance measuring approach is based on FMCW multi tone modulation in combination with an innovative correlation evaluation.