C4.1 - A Programmable 7GHz Frequency Divider in a SiGe Bipolar Technology for Highly Linear Fractional-N Ramp Generation

G. Hasenäcker, N. Pohl, Th. Musch & H. Knapp
Millimeter wave radar systems are well suited for applications in automotive and industrial distance measurement sensors. The precision of FMCW radar systems notably depends on the bandwidth and the linearity of the generated frequency ramps. Thus, high precision and high speed measurement systems are in need of highly linear frequency ramps. The realization requires a phase-locked loop (PLL) with an adjustable output frequency. The PLL’s output frequency is determined by the division ratio of a...