We focus on the optimized design and characterization of RF/millimeter-wave radar modules using the M3 approach (methods, models, measures). Based on the application requirements, the implementation concept is developed in conjunction with the M3 approach. This consists of hardware, packaging and test concept. In the implementation phase, the influences of the packaging technologies and their process variations on the system properties are already taken into account at the beginning of the development process. This avoids re-design iterations, which helps to shorten development time and reduce development costs.