61 GHz Six-Port radar frontend for high accuracy range detection applications

Range detection is an challenging task, especially if high accuracy has to be reached. The hereby proposed 61 GHz continuous wave radar system is based on a phase detector using Six-Port technique. For accuracy enhancement an improved isolation radar coupler has been introduced for broadband frequency modulated continuous wave radar as well as narrow band radar techniques. Furthermore, a Six-Port network based on four hybrid couplers is presented. Finally, the most important system sub-components have been validated by measurements.