Ahighlyminiaturizedandcommerciallyavailablemillimeterwave(mmw)radarsensorworkinginthefrequencyrangebetween121and127GHzispresentedinthispaper.Itcanbeusedfordistancemeasurementswithanaccuracyinthesingledigitmicrometerrange.Thesensorisbasedonthefrequencymodulatedcontinuouswave(CW)rada