Ahighly integrated silicon platform(Hi-Mission) for high frequency applications is introduced.This platformutilizes heterogeneous Multi-Chip Module-Deposited (MCM-D) technology with integrated passive devices together with silicon GaAs Monolithic Microwave Integrated Circuit (MMIC) technology developed for the automotive Ultra Wide B(UWB) radar (short-range radar) frequency bfrom 77 to 81 GHz. Developments are described in the area ofMCM-D process development,MMIC, integrated phased array antenna,module design, assembly process development. The demonstrator is composed of two test vehicles designed for conducted radiated measurements, respectively. Test results are presented at the component module level._x000D_