Millimeter-wave CMOS Transceiver Techniques For Automotive Radar Systems

Recently, advanced driver assistance systems (ADAS) with the keyword of "safety" have attracted attention in the world. Many mega-suppliers (Tier 1) and the others have been carrying out development for safe systems using cameras, lasers, and millimeter-wave radar to realize a self-driving system in the near future. Fujitsu Laboratories has been developing millimeter-wave monolithic microwave integrated circuits (MMICs) and modules for automotive radar systems, and is now interested in MMICs based on complementary metal oxide semiconductors (CMOS). In this paper, we describe millimeter-wave amplifiers and a 4-ch transmitter based on accurate device measurement and modeling techniques using the on-wafer calibration method. A phased locked loop (PLL) which operates at 0.96 GHz/ps, the world's fastest modulation speed, is also discussed.